JP2601425B2 - Variable optical system controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field The present invention relates to a variable magnification area which includes a variable power lens group and a focusing lens group, and has a variable focal length. The present invention relates to a variable-magnification optical system control device having a variable-magnification optical system that can be arbitrarily set to any one of a plurality of regions such as a storage region for storing a lens group at a predetermined position and a macro region capable of macro photography. is there.

(B) Technical Field In recent years, computerization and electrification of a photographing lens used for a camera body and a camera have been remarkably advanced. For example, in a photographing lens, a lens group constituting the photographing lens is driven by a motor or the like, and a focal length is reduced. In multiple areas such as a variable magnification area that can be changed and a macro area that allows macro photography,
It is configured so that it can be set by one-touch switch operation. On the other hand, the photographing lens includes a variable power lens group, a macro lens group, and a focusing lens group. The set area is updated by moving the variable power lens group. It is configured such that the focusing operation can be performed by updating the distance and moving a part of the zoom lens group independently of the zooming operation for updating the focal length. In the case of a so-called varifocal lens,
The in-focus position for the same subject in the zooming area changes according to the focal length, and generally draws a hyperbola. More specifically, for example, when an infinity position (∞ position) on the optical axis corresponding to a subject distance at infinity is set as a reference (invariant), the closest position and the closest position on the optical axis corresponding to the closest subject distance are determined. As for the focusing position on the position side, as the focal length approaches the longest focus (tele) side, the amount of extension from the ∞ position increases, and as the focal length approaches the shortest focus (wide) side, the steering amount decreases. A focusing curve represented by a hyperbola that becomes smaller. Therefore, the movable range of the focusing lens group is between the above-mentioned position か ら and the above-mentioned closest position. Further, a stopper having a shape equivalent to the focusing curve for stopping the movement of the focusing lens group is formed at the end of the movable range at the closest position side, and the ∞ position is provided with a focal length change. In this way, an invariable, that is, a linear stopper is formed. Therefore, when the focusing lens group is in the vicinity of the close position on the telephoto side, the focusing lens group is also driven as a part of the zoom lens group by the zooming operation and the area updating operation of updating the setting area. Therefore, assuming that the storage area is contiguous on the wide side, if an attempt is made to update the set area from the variable power area to the storage area, a part of the variable power lens group will impact on the hyperbolic stopper. There is a problem that the area update operation is blocked in the middle of the variable magnification area.

(C) Object The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to execute a region updating operation with a simple configuration at a low cost by using a focusing lens group stopping means to perform variable power optics. An object of the present invention is to provide a highly operable variable power optical system control device that automatically and reliably avoids blocking movement of a system.

(D) Configuration In order to achieve the above object, in the first invention (the invention described in claim 1), a variable power lens group and a focusing lens disposed on the same optical axis are used. A variable magnification area comprising a group and a macro lens group, the focal length of which can be changed, a storage area for storing each of the lens groups at a predetermined position,
In a variable power optical system control device having a variable power optical system that can be arbitrarily set to any one of a plurality of regions such as a macro region where macro shooting is possible, a variable power driving unit that drives the variable power optical system; Focus driving means for driving the focusing lens group, variable power control means for controlling the variable power driving means to set the variable power optical system in any of the regions, and controlling the focus driving means Focusing control means and a focusing lens group are provided at both ends of a movable range in which the focusing lens group can be moved, and the movement of the focusing lens group is suppressed. A focusing lens group stopping means having an invariable stopping portion in which the stopping position is invariable and does not hinder the movement of the zoom lens group or the macro lens group, and updates a setting area of the zoom optical system. Prior to performing the region update operation Wherein the focusing lens group is driven in the vicinity of the invariable stop. Further, in the second invention (the invention described in claim 2), the focusing lens group is arranged on the same optical axis. A variable power lens area, a focusing lens group, and a macro lens group, and a variable power area whose focal length can be changed by the variable power lens group. In a variable power optical system control device having a variable power optical system that can be arbitrarily set in any of a plurality of areas such as a storage area of a camera, a macro area capable of macro photography, a variable power drive for driving the variable power optical system, Means, a focus driving means for driving the focusing lens group, a variable power control means for controlling the variable power driving means to set the variable power optical system in any one of the regions, and the focus driving Focusing control means for controlling the means; The focusing lens group is provided at one end of a movable range in which the focusing lens group can move, and the movement of the focusing lens group is stopped. By the stop, the movement of the variable power lens group is prevented, and the change in the focal length is prevented. Accordingly, the movement of the focusing lens group cannot be restrained within the blocking area where the stopping position and the blocking position change together and the movable area connected to the blocking area, and the variable power lens group or the macro Focusing lens group restraining means having a non-blocking area in which movement of the lens group cannot be blocked, and a variable power system area determining means for determining whether the variable power optical system is in the blocking area or the non-blocking area Prior to performing an area update operation for updating the setting area of the variable power optical system, when the variable power optical system is determined to be in the blocking area by the variable power system area determination means. The focusing lens group Serial-focus control means so as to move to a non stopband is characterized in that it has configured to drive controls the focusing drive means.

Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the overall configuration of a variable power optical system control device according to the present invention. In FIG. 1, reference numeral 1 denotes an optical axis of a variable power optical system, and 2 denotes the variable power optical system arranged on the optical axis 1 so as to be movable along the optical axis 1. 2a, 2b, 2c, Reference numerals 2d and 2e denote a first group lens, a second group lens, a third group lens, a fourth group lens, and a fifth group lens, each of which includes a single lens or a plurality of lenses. The fifth lens group 2e forms a focus lens group 3, and the first lens group 2a to the fifth lens group 2e, including the fifth lens group 2e, form a variable power lens group and a macro lens group.
Note that the focal length of the variable power lens group is f. Numeral 4 drives the variable power optical system 2 to set each of a storage area for making the variable power optical system 2 compact, a variable power area where the focal length can be changed, and a macro area where macro photography is possible. A variable power driving unit including a variable power motor Mz as a variable power driving means and a mechanism unit (not shown). Particularly in a variable power region, the focal length f is the longest focal length on the telephoto side focal length (hereinafter simply referred to as the ) To the wide-angle focal length as the shortest focal length (hereinafter simply referred to as “wide position”).
In order to set the focal length to an arbitrary focal length between the variable magnification optical system 2 and the variable magnification optical system 2, the variable magnification optical system 2 is driven as a variable magnification lens group. In the macro area, the variable power optical system 2 functions as a macro lens group. Reference numeral 5 denotes an identification pattern section for generating area identification information, which will be described in detail later, 5a, 5b, 5c.
Is a first pattern, a second pattern, a third pattern, 5d is a power supply terminal connected to a power supply + V, 5e is an output terminal for outputting focal length information (Zp) proportional to the focal length f,
5f, 5g and 5h are output terminals for outputting identification information.
Each is configured to output a magnification area signal (a), a macro area signal (b), and a storage area signal (c). 5i is a grounded ground terminal, 6 is driven by the variable power drive unit 4 together with the variable power optical system 2, and contacts 6a, 6b and 6c made of integrally formed conductors are respectively connected to the first pattern 5a and the second pattern 5a. A brush 7 slidably in contact with the 5b and the third pattern 5c receives the focal length information (Zp), converts the focal length information (Zp) by an internal A / D converter, and then performs a shift correction operation. And a focus correction calculation unit 8 for outputting the result as a correction amount (Dfp). The focus correction calculation unit 8 performs the above-described region signals (a), (b),
In response to (c), the variable magnification optical system 2 detects which area is located, and outputs an area signal (d) indicating the detected area. The lens group position detector 11 is moved to an infinite distance position (∞) on the optical axis 1 corresponding to a subject distance from infinity to a close distance.
At any position of the movable range from a position) to the closest position, the focus driving unit consisting of the focus motor M _F and a mechanism (not shown) of the focusing drive means to independently drive the driving by the zoom driving unit 4 , 10 will be described later in detail, but a focus stopper as focusing lens group restraining means for restraining the movement of the focus lens group 3 driven by the focus driving unit 9 at the above-mentioned position お よ び and the above-mentioned closest position, and 11 has already been described. However, a focus lens group position detector (hereinafter abbreviated as “FPM”) that outputs the position of the focus lens group 3 on the optical axis 1 as focus position information (Sx) by voltage, and 12 is the correction amount (Dfp) ), A focus control unit 13 as focus control means for controlling the focus driving unit 9 receives the focus position information (Sx), performs A / D conversion, and further performs The area signal (d)
A non-blocking area in which the movement of the variable magnification optical system 2 is not blocked in response to the state signal (e) described later is determined by the data non-blocking area DS, the safe range MD, and the blocking area SH stored in advance, and the execution signal (f ) To the focus control unit 12, a non-blocking area determining unit 14 as a variable power system area determining unit, receives the area signal (d) and the state signal (e), and controls the variable power driving unit 4. Magnification control unit as magnification control means, 15 to 19 are all momentary switches that can be operated externally and close only when pressed, 15 is a storage switch, 16 is a magnification switch, 17 is a macro switch, 18 Is a magnification up switch (hereinafter simply referred to as an "up switch"), 19 is a magnification down switch (hereinafter simply referred to as a "down switch"), and 20a is a variable magnification area composed of the magnification switch 16 and the macro switch 17. Magnification / macro selector switch for switching between an area and a macro area, 20b is composed of an up switch 18 and a down switch 19, and a magnification switch for starting a magnification operation for updating the focal length in the magnification area, 21 is The switches 15, 16, 17, 18, and 19 are connected, a switch determiner that determines the state and outputs the state as the above-described state signal (e), and + V is a power supply. The input signals (a),
The input terminals of (b) and (c) are all pulled up internally. In addition, the input / output relationship of each of the above parts shows only the main signal.

FIG. 2 is a pattern diagram showing the identification pattern section 5 of FIG. 1 in detail. The same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 2, 22 to 24 constitute a part of the first pattern 5a, 22 is a focal length information generating pattern (hereinafter referred to as "Zp pattern") composed of a resistor, and 23 and 24 are composed of conductors and are both grounded. A ground pattern connected to the terminal 5i, 25 to 27 constitute a part of the second pattern 5b, and 25 is a conductor connected to the output terminal 5e, which is connected to the Zp pattern 22 through the contacts 6a and 6b of the brush 6. A current collecting pattern for detecting the generated voltage (focal distance information Zp), non-magnifying patterns 26 and 27 both formed of conductors connected to the output terminal 5f, and 28 to 31 constituting a part of the third pattern 5c. Conductors, 28 and 29, are a storage position pattern and a brake pattern made of a conductor connected to the output terminal 5h, and 30 and 31 are a macro position pattern and a brake pattern made of a conductor connected to the output terminal 5g. P ₀ is the position of one end of the ground pattern 23 and the non-denaturing pattern 26 and the storage position pattern 28, and P ₁ is the storage position pattern
28 position of the other end of, P ₂ is located at one end of the brake pattern 29, P ₃ is located at the other end of the non-scaling pattern 26, P ₄ is located at one end of the collector pattern 25, P ₅ is ground pattern 23 And the other end of
Position of the other end position and the brake pattern 29 one end of Zp patterns are in contact, P ₆ is located at one end of the brake pattern 31, P ₇ is a position where power is applied at the other end of Zp pattern 22,
P ₈ is located at one end of the ground pattern 24, P ₉ is located at the other end of the collector pattern 25, P ₁₀ is located at one end of the non-scaling pattern 27, P ₁₁ is the position of the other end of the brake pattern 31, P ₁₂ the position of one end of the macro location pattern 30, P ₁₃ is the position of the respective other end of the ground pattern 24 and the non-scaling pattern 27 and the macro location pattern 30. Incidentally, P ₇ to P _8, the first pattern 5a, P ₃ to P ₄ and P ₉ to P ₁₀ is the second pattern 5
of b, by P ₁ to P ₂ and P ₅ to P ₆ and P ₁₁ to P ₁₃ insulating portions constituting respectively part of the third pattern, except for the insulating portion of the P ₅ to P _6, the interval Is so narrow that it is not short-circuited by the respective contacts 6a, 6b, 6c of the brush 6. The movable range of the brush 6 is, of course, P _{0 to} P
It is ₁₃ . Hereinafter, P ₀ to P ₃ of the housing area, zooming range and P ₃ to P _10, it referred to as P ₁₀ to P ₁₃ to the macro area, further housed P ₀ to P ₁ position, P ₃ to P ₅ and P ₈ to P ₁₀ to the wide-angle position and the telephoto position, referred to as P ₁₂ to P ₁₃ and macro location.

FIG. 3 is a timing chart showing the change of the waveform of each part in FIG. The first
In FIG. 2 and FIG. In FIG. 3, the focal length information Zp is an analog signal, and the other signals (a), (b), and (c) are all H and L level signals.

Furthermore, when explaining the generation principle of the position and the waveform of the brush 6, for example, brush 6 when there between P ₀ to P ₁ of FIG. 2, the ground pattern 23, non-scaling pattern 26 and the stored position patterns 28 Are short-circuited by the brush 6 via the contacts 6a, 6b and 6c, respectively, and the ground pattern 23 is
Is grounded, so that the variable area signal of the output terminal 5f (a)
Is at L level, the storage area signal (c) at the output terminal 5h is also at L level, and the macro area signal (b) at the output terminal 5g is pulled up by the pull-up resistor in the area detection unit 8, and the brush 6
H since the position of because it is as P ₀ to P ₁ described above, the brake pattern 31, the macro position pattern 30 is open
Level. The output terminal 5e potential (focal length information (Zp)) is zero potential since the collector pattern 25 and the ground pattern 23 is short-circuited by the brush 6 when brush is in P ₄ to P _5, and from P ₅ potential rises with the movement of the P _6, is substantially the power supply voltage + V is between P ₆ to P _8.

FIG. 4 is a cam diagram showing characteristics of the variable power optical system 2 of FIG. In FIG. 4, reference numerals 32 to 36 denote cam lines indicating the movement of the first group lens 2a to the fifth group lens 2e, respectively, 36 denotes a cam line at the position ∞, and 36a denotes a cam line at the close position. Is shown. 37 is stowed position corresponding to P ₀ to P ₁ of FIG. 2, 38a and 38b are P ₃ of the second views, respectively, a position corresponding to P _5, of 39a and 39b are second views, respectively P _8, P ₁₀ , 40 is a macro position corresponding to P _{12 to} P ₁₃ in FIG. 2,
theta ₁ focus variable section corresponding to the P ₅ to P _8, is θ ₂ P ₁₀ ~P ₁₃
, ₃ is a storage area corresponding to P _{0 to} P ₃ , and θ ₄ and θ ₅ are a wide side and a tele side corresponding to the wide positions P _{3 to} P ₅ and the tele positions P _{8 to} P ₁₀ , respectively. Is the equilibrium region of

FIG. 5 is a development view of a cam groove specifically showing the cam wire of FIG. The same parts as those in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 5, reference numerals 41 to 45 denote cam grooves corresponding to the cam wires 32 to 36, respectively, and reference numerals 46 to 49 denote first group lenses.
This is a straight cam groove for converting the second lens group 5a to the fifth lens group 5e into movement in the optical axis direction. Numeral 50 corresponds to the moving cam frame, and the equilibrium areas θ ₄ and θ _{5 of the} above-described wide position and tele position.
Is a region where the positions of the respective group lenses 2a to 2e do not change and the focal length does not change even if the moving cam frame 50 moves (rotates).

FIG. 6 is a diagram for explaining the characteristics of the focus stopper 10 of FIG. 1 and the operation of each unit in FIG. 1. The vertical axis indicating the characteristics of the variable magnification area is Zp, the horizontal axis is Sx, and the teleposition of the graph is shown. Graphs showing characteristics of the macro area and the storage area are added to the side and the wide position side, respectively. In FIG. 6, reference numeral 51 denotes a と し て position stopper as an invariable stop provided on the ∞ position side of the focus stopper 10; 52, a closest position stopper that changes with a change in the focal length f or the focal length information (Zp); DS is the non-blocking area, MD is the safe range in the macro area, SH is the blocking area, 53 is the closest stopper on the closest side in the macro area, 54 is an arbitrary focusing curve, and 55 and 56 are both on the focusing curve 54. Points 57 and 58 along with point 56
Zp = Zp points on _1, 59 and 60 and 60a is an arrow indicating the moving direction of the focus lens group 3, 61～67,66A the arrow indicating the direction of movement of the variable power optical system 2 including a focusing lens group 3, 68,6
8a is a point on the storage position, and 69, 69a and 69b are points on the macro position.

7 to 10 are flowcharts showing the operation sequence of FIG. 1. FIGS. 7 and 8 are used in the main routine, and FIGS. 9 and 10 are used in the main routine of FIG. This is a subroutine “focus drive”.
FIG. 9 shows the operation of the focus drive according to the first invention, and FIG. 10 shows the operation of the focus drive according to the second invention. In addition, the configuration of these flowcharts will be described together in the following description of the operation, and will not be repeated here.

Now, regarding the operation of the present embodiment thus configured, the operation according to the first invention will be described first with reference to the main routine of FIGS. 7 and 8 and the subroutine of FIG.

(I) Operation for updating the area to the storage area (a) In the case of being in the variable power area It is assumed that the variable power optical system 2 including the focus lens group 3 is located at a point 56 on the focusing curve 54 in FIG. The third position corresponding to Zp = Zp ₁ of made to correspond to FIG. The focal variable interval P ₅ to P _8,
That is, it is assumed that it is in the variable magnification area. Here, the storage switch 15
Is operated (closed), the flowchart starts from START in FIG. In the first conditional branch “magnification area?”, The area detection unit 8 checks the signal level of the magnification area signal (a). Since H-level case, reach the branches to YES because it is understood that the variable power optical system 2 is in the zooming range P ₃ to P ₁₀ proceeds to Figure 8. The next condition branch “storage switch closed?” Branches to YES, and the next subroutine “focus drive” is reached. The contents of this subroutine are shown in FIG. 9 as described above. In the first conditional branch “∞ position?” In FIG.
After reading the output Sx of the FPM 11 and performing A / D conversion, it is checked whether or not the focus lens group 3 is positioned near the position stopper 51 in FIG.

In the present case, since it is on the focusing curve 54, the process branches to NO, and in the next “drive to the ∞ position”, the non-blocking zone determination unit 13 indicates that the storage switch 15 from the switch determination unit 21 is ON. After confirming the state signal (e), the execution signal (f) is output, and the focus control unit 12 that has received the execution signal (f) drives the focus lens group 3 in the direction of the arrow 60 via the focus drive unit 9. Then, it passes through the point 57, is further driven in the direction of the arrow 59, and drives the focus lens group 3 to a point 58 near the ス ト ッ パ position stopper 51. Here again, return to “∞ position?”
Branches to YES to stop the focus motor M _F in the next "focus drive stop", returns to Figure 8 of the main routine in RTS, moving from "focus driving" for the next operation. In the next “drive to wide position”, the driving direction is determined with reference to the variable power control area signal (d) and the state signal (e), and the variable power optical system 2 is driven to the wide position. That is, it is driven in the direction of arrow 66. Housing area signal (c) is falling at P _5, which outputs a region signal (d) indicating that the variable power optical system 2 to detect the region detecting unit 8 is in the wide-angle position P ₃ to P _5, In response to this, the magnification control unit 14 proceeds to the next “drive to storage position”, and further drives the variable magnification optical system 2 from the wide position to the storage positions P _{0 to} P ₁ . That is, in FIG. 6, the drive is performed in the direction of arrow 67, and the drive is completed at point 68, which is the storage position. Then, in the flowchart, the next conditional branch “storage switch closed?” Branches to YES, and the area update operation to the storage area ends with END. Note that the “focus drive”, “drive to the wide position”, and “drive to the storage position” are collectively referred to as “storage setting operation via zooming”.

(B) In the macro area Next, the variable power optical system 2 moves the macro position P _{12 to} P _{13 in the} macro area.
In FIG. 6, the operation at the point 69a will be described with reference to FIG. 6, but the other conditions are the same as (i) of (i). When the storage switch 15 is operated and closed, the third conditional branch “macro position?” In the flowchart of FIG.
It branches to YES and moves to FIG. In FIG. 8, the “subject switch closed?” Branch to YES, and in the next subroutine “focus drive”, the subroutine of FIG. 9 is executed to move the focusing lens group 3 to the vicinity of the ∞ position stopper 51 (point 6).
9) Drive. In the next “drive to tele position”, the variable power optical system 2 at the macro position (point 69) is moved to tele positions P _{8 to} P ₁₀ . Then, the next “storage switch closed?” Is branched to YES, and the above-mentioned storage setting operation via scaling is executed. This operation is the same as that described above. Note that the above "focus drive"
And "driving to the tele position" are collectively referred to as a tele position setting operation.

(C) when when in the storage area variable magnification optical system 2 in the example a point 68 in FIG. 6 when in the stored position P ₀ to P ₁ of the housing area, the second conditional branch Figure 7 "housing "?" Branching to YES, and moving to FIG. 8, branching to "YES?" And ending the operation by END. That is, since the variable power optical system 2 is already in the storage position, the area update operation to the storage area is not performed.

(Ii) Operation for updating the area to the macro area (a) When the area is in the magnification area The magnification optical system 2 is at the point 56 in FIG. 6, and the macro switch 17 of the magnification / macro switch 20a is operated (closed). ), The first conditional branch “zoom area?” In FIG. 7 is branched to YES, and the process proceeds to FIG. "" Is branched to NO, and the next "is the switching macro?" Is branched to YES to reach "focus drive". Then, similarly to the above, the focus lens group 3 is driven in the direction of arrows 60 and 59 from the point 56 to the point 58 by the subroutine of FIG. By the next “drive to the tele position” and the next “move to the macro position”, the variable power optical system 2 is driven in the direction of the arrow 65 and reaches the point 69 which is the macro position. Then, the next “storing switch closed?” Branches to NO, and the next “switching is macro?” Branches to YES, and executes the predetermined operation (description omitted) at the next “macro focus” and ENDs. , And the operation of updating the area to the macro area ends. The “focus driving”, “driving to the tele position”, and “driving to the macro position” are collectively referred to as “magnification via macro setting operation”.

(B) In the macro area When the variable power optical system 2 is in the macro position in the macro area, it is already at the position to be updated, as described above.
Nothing is done.

When the variable power optical system 2 when in (c) storage position is in the storage position P ₀ to P ₁ of the housing area (point 68 in FIG. 6), when the macro switch 17 is operated, the Figure 7 " The storage position? "Is branched to YES, the process proceeds to FIG. 8, and the" storage switch closed? "Is branched to NO to reach" focus drive ". The subroutine of FIG. 9 is executed in the same manner as described above, and the focus lens group 3 is
Drive to near 51. Then, in the next “drive to wide position”, the variable power optical system 2 is driven to the wide position, and the following operation is the same as (ii) of (ii).

(Iii) Operation for updating the area to the variable-magnification area Since it can be inferred from the above (i) and (ii), the description is omitted.

Next, the operation according to the second invention is divided into cases in the same manner as described above, and the differences from the above-described operation are emphasized, and the main routine in FIGS. 7 and 8 and the subroutine in FIG. explain.

(I) Updating the area to the storage area (a) In the case of being in the variable power area It is assumed that the variable power optical system 2 is located at the point 56 in FIG. That is, it is a variable magnification area. Here, it is assumed that the storage switch 15 is operated and closed. The flowchart is shown in the STAR of FIG.
Starting from T, the "magnification area?" Branch to YES, the process moves to FIG. 8, and the next "storage switch closed?" Branches to YES, and the subroutine "focus drive" is reached. Where the
10, first, in “Sx reading”, the non-blocking area determination unit 13 reads the position on the optical axis of the focus lens group 3 at the point 56, that is, the focus position information Sx output from the FPM 11, and reads the A / D. After the conversion, in the next conditional branch “in the non-blocking zone?”, The data non-blocking zone DS stored in advance is referred to, and in this case, it is outside the non-blocking zone DS, that is, NO Branch to The next conditional branch, "Is the switching macro?", Branches to NO, drives the focus lens group 3 in the direction of arrow 60 at the next "drive to the side", and moves at the next "Sx read". While monitoring the output Sx of the FPM11 that has begun to change, the next “In the non-blocking range?”
In, it is checked whether or not the focus lens group 3 has entered the non-blocking area DS. If not, the process branches to NO. The branches YES when it reaches the point 57, and stops the focus motor M _F in the next "focus drive stop", the flow returns to the main routine of FIG. 7 in RTS. After the next “drive to the wide position”, in the same manner as in the operation (i) above, the variable magnification optical system is driven in the direction of arrow 66a to drive to the storage location point 68a of the storage area and to the storage area. Terminates the region update operation.

(B) In the macro area When the variable power optical system 2 is located at the macro position (point 69a) in the macro area, it is the same as (b) in (i) above, except that each subroutine " Only the content of the “focus drive” shown in FIG. 10, ie, the focus lens group 3 is not driven to the vicinity of the
The only difference is that the drive is stopped when the vehicle enters the DS (point 69b).

(C) In the storage area As in (i) of (i), nothing is performed because the storage position has already been updated.

(Ii) Updating the area to the macro area (a) In the case of the variable magnification area When the variable magnification optical system 2 is at the point 56, the switch 17
Is operated, from the start in FIG. 7 to the macro setting operation via the magnification change in FIG. 8 is the same as (a) in (ii) above, and in FIG. Then, execute “Sx read”, branch “NO in non-blocking area?” To NO, and branch to the next “Is switching macro?” To YES.
Then, in the next conditional branch “within the safe range?”, The non-blocking area determination unit 13 checks whether or not the focus lens group 3 is within the data safe range MD stored in advance, and in this case, branches to YES. After "stop of focus driving" (in this case, nothing is performed on this operation), the process returns to the main routine of FIG. 8 by RTS, and "drive to telephoto position" and thereafter are executed in the same manner as described above. The variable power optical system 2 is driven in the direction of arrow 63, and a point 69a which is a macro position of a macro area is specifically set.
Set to and finish the operation.

Also, if the variable power optical system 2 is located at the point 55 in FIG. 6 and the macro switch 17 is operated here, the "in the safe range?" Branch to NO in FIG. Driving ”starts driving the focus lens group 3 in the direction of the arrow 61a, returns to“ within the safe range? ”, Branches to YES when the arrow 63 intersects, and focus motor M at the next“ stop focus driving ”. Stop _F and return to FIG. Thereafter, the variable power optical system 2 is driven in the direction of arrow 63 in the same manner as described above to
Set to a.

(C) In the storage area Since the variable power optical system 2 is within the non-blocking area DS at any of the points 68 and 68a, the first conditional branch “non-blocking area?” In FIG. If the process branches to YES, that is, nothing is performed in the subroutine "focus drive", and as shown in FIG. 6, when the vehicle goes straight on directly in the figure, the macro position reaches the point 69 or 69b.

(Iii) Updating the area to the variable-magnification area The description is omitted because it can be inferred from the above description.

The operation after "macro position?" Is branched to NO in the flowchart of FIG. 7 is not directly related to the gist of the present invention, and therefore the description is omitted.

When the magnification changeover switch 20b is operated in the magnification change area, the magnification change control unit 14 receiving this state signal (e) starts the magnification change operation, and the magnification change optical system 2 switches the varifocal lens. In this case, a focus shift occurs due to the zooming operation. Therefore, the focus control unit 12 receives the correction amount Dfp for correcting the focus shift from the focus correction calculation unit 7 and performs a correction operation along the focus curve 54. Since this is not directly related to the gist of the present invention, the description of this point is omitted.

As described above, according to the present embodiment, as the operation according to the first invention, the focus lens group 3 is moved to the close position stopper 52 before performing the area update operation for updating the set area of the variable power optical system 2. The movement is not hindered by the closest stopper 53. Since the drive is performed in the vicinity of the position stopper 51, the movement of the variable power optical system 2 including the focus lens group 3 is as shown by arrows 64, 62 and 61. The area update operation can be automatically performed without being blocked by the nearest position stopper 52 and the nearest stopper 53,
There is an advantage that operability is improved.

Further, as an operation according to the second invention, before executing the area update operation, the focus lens group 3 is driven into the non-blocking area DS. When the close position stopper 52 is in the positional relationship as shown in FIG. 6, if the focus lens group 3 is within the safe range MD when performing the area update operation from the variable magnification area to the macro area, Since the variable power optical system 2 can be immediately driven to the macro area without driving the focus lens group 3 to the stop area DS, not only the operability is improved as described above, but also the driving time can be shortened. is there.

It should be noted that the present invention is not limited to the above-described embodiment,
Various modifications can be made without departing from the scope of the invention.

For example, the macro area and the storage area can each be modified.

For example, the macro area and the storage area are not limited to being connected to the tele position side and the wide position side of the variable magnification area, but may be connected in opposite directions.

The focus lens group 3 is not limited to the fifth lens group 2e, but may be the first lens group 2a or the first lens group 2a.
And the combination of the second group lens 2b. The point is that any part of the variable power optical system 2 may be used as long as it is configured as the focus lens group 3.

Further, the setting area is not limited to the three areas of the macro area, the scaling area, and the storage area, and the macro area may be omitted to be two areas, or a new area may be added to be four areas. The point is that a plurality of areas may be used.

When the variable power optical system 2 is composed of a zoom lens, the focus correction calculation unit 7 may be omitted.

(E) Effects As described above in detail, according to the present invention, the position where the focusing lens group is stopped does not change due to a change in the focal length at one end of the movable range of the focusing lens group. The optical system has an invariable stop that does not prevent the area update operation of updating the setting to any of a plurality of setting areas that can be set, and moves the focusing lens group to the inside of the movable area on the other end side. Stop it,
The stop prevents the area updating operation of the variable power optical system, and the stop and the stop position change with the change of the focal length. In spite of being restricted by a focusing lens group blocking means having a non-blocking region that cannot block the focusing lens group and cannot block the variable power optical system, the first invention The focusing lens group is driven to the vicinity of the invariable stop before the area updating operation is performed. As a second invention, the focusing lens group is driven before the area updating operation is performed. Since the group is configured to be driven into the non-blocking area, the inexpensive and simple configuration is used for the area updating operation by the focusing lens group stopping means that tends to occur in a variable power optical system having a plurality of setting areas. Prevention (b H) can be automatically avoided, particularly second
In the present invention, it is possible to provide a variable power optical system control device capable of shortening the operation time required for the avoidance and improving operability.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the overall configuration of a variable power optical system control device according to the present invention, FIG. 2 is a pattern diagram showing the identification pattern portion of the embodiment shown in FIG. 1 in detail, and FIG. FIG. 4 is a timing chart showing operation waveforms output from the identification pattern portion, FIG. 4 is a cam diagram showing characteristics of the variable power optical system of FIG. 1, and FIG. 5 is an enlarged cam diagram of FIG. FIG. 6 is a development view of the cam groove specifically shown, showing the characteristics of the focus stopper shown in FIG. 1, and illustrating the operation of FIG. 1, and FIGS. FIGS. 7 and 8 show a main routine, and FIGS. 9 and 10 show a subroutine "focus drive" used in the main routine.
FIG. 9 shows the operation of the main part according to the first invention, and FIG.
2 shows the operation of the main part according to the invention. DESCRIPTION OF SYMBOLS 1 ... Optical axis, 2 ... Magnification optical system, 2a, 2b, 2c, 2d, 2e ... 1st group lens-5th group lens, 3 ... Focusing lens group, 4 ... Magnification drive part , 5... Identification pattern portion, 5a, 5b, 5c... First, second, third patterns, 5d... Power supply terminal, 5e, 5f, 5g, 5h... Output terminal, 5i. ... brush, 6a, 6b, 6c ... contact, 7 ... focus correction calculation unit, 8 ... area detection unit, 9 ... focus drive unit, 10 ... focus stopper, 11 ... focus lens group position detection Unit (FPM) 12: Focus control unit, 13: Non-blocking area judgment unit, 14: Magnification control unit, 15: Storage switch, 16: Magnification switch, 17: Macro switch, 20a ... Magnification / macro changeover switch, 20b Magnification changeover switch, 21 Switch decision section, 22 Focal length information generation pattern, 23,24 Ground pattern, 25 Current collection pattern , 26, 27 ...... non zooming pattern, 28 ...... storage position patterns, 29, 31 ...... brake pattern 30 ...... macro location pattern, Mz ...... zooming motor, M _F ...... focus motor, + V ...... Power supply, 51: Position stopper, 52: Close position stopper, 53: Closest stopper, DS: Non-blocking area, MD: Safety area, SH: Blocking area.

Claims (2)

(57) [Claims] 1. A variable magnification area including a variable power lens group, a focusing lens group, and a macro lens group disposed on the same optical axis, the focal length of which can be changed. The variable magnification optical system is driven in a variable magnification optical system control device having a variable magnification optical system that can be arbitrarily set to any one of a plurality of regions such as a storage region for storing and a macro region capable of macro photography. Zoom drive means, focus drive means for driving the focusing lens group, zoom control means for controlling the zoom drive means to set the zoom optical system in any of the regions, Focus control means for controlling the focus driving means, and the focusing lens group are provided at both ends of a movable range in which the focusing lens group can move, and the movement of the focusing lens group is stopped. With the change of the focal length, the position of the above stop does not change. Focusing lens group stopping means having an invariable stopping portion that does not hinder the movement of the variable power lens group or the macro lens group, and executes an area updating operation for updating a setting area of the variable power optical system. A variable-magnification optical system control device, characterized in that the focusing lens group is configured to be driven near the invariable stop portion beforehand. 2. A variable magnification area, comprising a variable power lens group, a focusing lens group, and a macro lens group, disposed on the same optical axis, wherein a focal length can be changed by the variable power lens group. A storage area for storing each group in a predetermined position,
In a variable power optical system control device having a variable power optical system that can be arbitrarily set to any one of a plurality of regions such as a macro region where macro shooting is possible, a variable power driving unit that drives the variable power optical system; Focus driving means for driving the focusing lens group, variable power control means for controlling the variable power driving means to set the variable power optical system in any of the regions, and controlling the focus driving means Focusing control means, provided at one end of a movable range in which the focusing lens group is movable, for stopping the movement of the focusing lens group, and by stopping the movement, the movement of the zoom lens group is prevented; and The movement of the focusing lens group cannot be stopped in the stop area where the stop position and the stop position change together with the change of the focal length, and the movement of the focusing lens group cannot be stopped within the movable area connected to the stop area. Double lens group or the above macro lens Focusing lens group stopping means having a non-blocking area in which movement of the lens group cannot be prevented; and a variable power system area determining means for determining whether the variable power optical system is in the blocking area or the non-blocking area. Prior to performing an area update operation for updating the set area of the variable power optical system,
When the variable power system area determining means determines that the variable power optical system is in the non-blocking area, the focus control means controls the focus driving means to move the focusing lens group to the non-blocking area. A variable-magnification optical system control device, which is configured to perform drive control.