JP2907705B2 - Main reflector support - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflection telescope used for astronomical observation and the like, and more particularly to an apparatus for supporting a main reflection mirror.

[0002]

2. Description of the Related Art At present, most of optical telescopes used for astronomical observation are large-diameter reflective telescopes. This is because, compared to a refracting telescope of the same magnification, there are advantages such as a shorter length in the axial direction and less chromatic aberration.

[0003] The main reflecting mirror of the reflecting telescope is a concave mirror, and the concave mirror collects light from the observation object. FIGS. 13 to 1 show a conventional device of this main reflector and its supporting device.
It is shown in FIG. 13 and 14, the main reflecting mirror 101 has a concave mirror 101 on the upper surface in the figures. This reflecting mirror 101 is fixed to a support base 102 via a support structure 103. A detailed view of the support structure 103 is shown in FIG.
It is shown in FIG. The support structure 103 includes a thin rod 104. The thin rod 104 is used to absorb a difference in elongation due to a difference in the coefficient of thermal expansion between the support 102 and the reflecting mirror 101.
01 in the radial direction. Further, the reflecting mirror 101 is a counterweight for reducing deformation of the reflecting mirror due to its own weight when the main reflecting mirror is tilted so as to be directed to an observation target.

[0004]

Since the conventional main mirror supporting device is constructed as described above, when a large force is applied to the reflecting mirror due to an earthquake or the like, the thin rod is deformed and the reflecting mirror is deformed. There has been a problem that it may move greatly from a predetermined position and may be damaged by interfering with other structures. In particular, this is an important problem when the main reflecting mirror has a thin structure in order to reduce the weight of the entire apparatus.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has a function of protecting a main reflector from being damaged when a large force is applied to the reflector due to an earthquake or the like. It is intended to provide a device.

[0006]

Means for Solving the Problems (1) In order to achieve the above-mentioned object, a main reflector supporting device according to the present invention comprises a main mirror.
A support for supporting the mirror via a support member, and the support
An auxiliary support provided on the upper surface, an outer peripheral surface of the main reflecting mirror,
It is interposed between the sub-supports and controls the radial movement of the main reflector.
And a buffer means for suppressing the hydraulic pressure.
Includes damper .

(2) Another main reflecting mirror according to the present invention
The supporting device supports the main reflecting mirror via a supporting member.
A support, and a sub-support provided on the support,
Buffer hand interposed between the outer periphery of the main reflector and the sub support
And a step. And further, the buffer means
The first buffer installed between the outer peripheral surface of the main reflector and the sub support
Means, provided on the outer peripheral portion facing the front direction of the main reflecting mirror
Second buffer installed between the first contact surface and the sub-support
Means, provided on the outer peripheral portion facing the rear direction of the main reflecting mirror
Third buffer installed between the second contact surface and the sub-support
Means, wherein the first buffer means is provided in a radial direction of the main reflecting mirror.
Direction, and the second and third buffering means
Suppress movement of the reflector in the optical axis direction .

(3) Still another embodiment according to the present invention
The reflecting mirror support device supports the main reflecting mirror via a supporting member.
A supporting base to be held, and a sub-supporting base provided on the supporting base
Between the outer periphery of the main reflector and the sub-support.
Buffer means. And furthermore, the main counter
On the outer circumference of the mirror, the optical axis of the main reflector and the radial direction
A first contact surface that is arranged obliquely to the front of the reflecting mirror,
It is arranged obliquely to each of the optical axis and the radial direction of the main reflector.
A second contact surface facing the rear surface of the reflecting mirror;
The means is provided between the first contact surface and the auxiliary support.
(1) a cushioning means, provided between the second contact surface and the sub-support
And second buffer means, wherein the first and second buffer hands are provided.
The step allows the main reflector to move in the radial and optical directions.
Suppress .

Further, the buffer means (2) and (3)
It may include a hydraulic damper. In addition,
The cushioning means of (2) and (3) shall be made of rubber.
Can be. Further, the buffer means of (2) and (3)
May be included .

Further, the cushioning means made of rubber is mainly
A ring-shaped object provided around the entire circumference of the reflecting mirror;
Can be done .

In addition, the buffer means is less at the outer periphery of the main reflecting mirror.
And three can be arranged .

Further, the buffer means including the hydraulic damper may be
Each block that equally divides the outer periphery of the mirror into three
The hydraulic pipes of the pumps may be connected .

[0013] Further, the sub-support may be located from a main reflecting mirror.
It is possible to have an evacuation mechanism that moves to the home position.
I can .

Further, the retracting mechanism is provided on the support table.
On the rail provided in the radial direction of the main reflecting mirror,
A mechanism in which the support base slides and retracts can be used .

[0015] In the retracting mechanism, the sub-support may be provided at a front side.
The sub-support is supported by a rotating shaft fixed on the support table.
A mechanism in which the table rotates and retracts may be used .

[0016]

The present invention has the above-described configuration and has the following functions.

In the present invention, the buffer means can prevent the main reflector from hitting other structures and being damaged. Further, the main reflector can be prevented from being damaged in response to the movement of the main reflector in the radial direction. Further
Buffer means for suppressing the movement of the main reflecting mirror in the optical axis direction.
By doing so, it is possible to oppose the movement in this direction. Further, by arranging obliquely to the optical axis and radially loose衝部material, it can be pressed together radially and the optical axis direction of the movement of the main reflector.

[0018] In addition, in the case where the loose opposition means a rubber material,
A simple configuration can be provided. Further, when a spring is used as the buffering means, it is possible to take a sufficient stroke and to cope with a large movement of the main reflecting mirror. Also, a hydraulic damper was used as a buffer means .
If also effectively primarily in the case of small strokes
The movement of the reflector can be suppressed.

Furthermore, by forming the cushioning member made of rubber material in a ring shape, it can correspond to any force. Also, by at least three placing gentle collision means may correspond to any force. Further, by dividing the hydraulic damper into three groups, by sharing hydraulic pipes for each group, the configuration is simplified.

Furthermore, by <br/> be made retractable sub support base, maintenance of the main reflecting mirror is facilitated.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show a first embodiment of a supporting device for a main reflecting mirror according to the present invention. FIG. 1 is a plan view, and FIG. 2 is a view showing in detail a portion relating to a buffer means of the present invention. The main reflector 11 is supported by a support 12 via a support structure 13 and an overload prevention device 14. The upper surface of the main reflecting mirror 11 is a mirror surface 11a in FIG. 2, and forms a concave mirror. In this apparatus, it can be seen that the main reflecting mirror 11 is configured to be thinner than the conventional apparatus. Therefore, sufficient consideration should be given to the strength of the main reflecting mirror 11 as compared with the conventional apparatus. The support structure 13 has a thin rod 13 as in the conventional device.
a, and the thin rod absorbs the difference in the coefficient of thermal expansion between the main reflecting mirror 11 formed of glass and the support 12 formed of steel. However,
In this configuration, when a large load is applied due to an earthquake or the like, the thin rod 13a is broken, and the thin rod 13a has to be replaced with a new one in order to return. Therefore, an overload prevention mechanism 14 is provided, and when a load equal to or more than a predetermined value is applied to the support structure 13, the coupling between the support base 12 and the main reflecting mirror 11 is released to prevent the thin rod 13a from being damaged. doing.

The main reflection mirror 1 is provided by the overload prevention mechanism 14.
When 1 is no longer fixed to the support base 12,
There is a possibility that the main reflector moves greatly and hits other components of the reflector telescope. In particular, the main reflecting mirror 11 is manufactured very precisely, and even if the collision does not lead to damage, the mirror 11a will not be usable if the mirror surface 11a is distorted.

Therefore, in the present apparatus, a sub-support 15 fixed to the support 12 so as to surround the outside of the main reflector 11 and a space between the sub-support 15 and the outer periphery of the main reflector are arranged. And a cushioning mechanism including the cushioning member 16. The buffer member 16 is formed of an elastic material such as rubber, and comes into contact with the main reflecting mirror 11 when the main reflecting mirror 11 moves as indicated by a dashed line 11 ′, and the main reflecting mirror 11 is sufficiently buffered. To prevent it from colliding with other structures. In the present apparatus, eight buffer mechanisms are arranged on the outer periphery of the main reflecting mirror. However, if at least three are arranged at equal intervals, the movement of the main reflecting mirror 11 can be suppressed. The reason why there are many shock absorbing mechanisms as in the present apparatus is to reduce the load that each shock absorbing mechanism bears, and thereby it is possible to prevent locally large stress from being generated in the main reflecting mirror 11. Further, the buffer member 16 may be arranged in a ring shape around the main reflecting mirror instead of being divided and arranged.

FIG. 3 shows a second embodiment according to the present invention. In the present embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
The second embodiment is different from the first embodiment in that the main reflecting mirror 11 is provided.
In the optical axis direction.

As shown in the figure, in the second embodiment,
The cushioning members 26a, 26b, 26
c is arranged. The first buffer member 26a corresponds to the radial movement of the main reflecting mirror as in the first embodiment, but the second and third buffer members 26b and 26c correspond to the movement of the main reflecting mirror 11 in the optical axis direction. Correspondingly, for example, when the main reflecting mirror is moved to a position 21 ′ indicated by a dashed line in the drawing, the main reflecting mirror is configured to come into contact with the second buffer member 26 b.

In the second embodiment, the second and third cushioning members 26b and 26c are arranged obliquely with respect to both the optical axis direction and the radial direction. It has the effect of suppressing movement. Therefore, the first
The second and third buffer members 2 are removed.
It is also possible to suppress the movements in the radial direction and the optical axis direction only by 6b and 26c. In addition, the second and third
The buffer members 26b and 26c can be arranged in the optical axis direction without being arranged diagonally so as to suppress only movement in the optical axis direction. Regarding these arrangements, the main reflector 1
1 should be selected according to the weight and the load capacity of the cushioning member.

FIGS. 4 and 5 show a third embodiment according to the present invention. In this embodiment, the same components as those in the above-described embodiments are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, the cushioning members 26a, 26b, 26c made of rubber according to the second embodiment are connected to the cushioning device 36 having a spring.
a, 36b, and 36c. Then, the main reflecting mirror 11 comes into contact with these buffering devices 36a, 36b, 36c at a position 31 'indicated by a one-dot chain line in the figure. By using a spring, the stroke can be lengthened, so that the shock applied to the main reflecting mirror 11 can be sufficiently buffered. Further, the supporting force can be easily changed by changing the elastic coefficient and the overall length of the spring.

FIG. 6 shows a fourth embodiment according to the present invention. In this embodiment, the same components as those in the above-described embodiments are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, the cushioning member 26 made of rubber of the second embodiment is used.
a, 26b, 26c are provided with a shock absorber 46 having a hydraulic damper.
a, 46b, and 46c. When the main reflecting mirror 11 moves to a position 31 'shown by a dashed line in FIG.
b, 36c. The hydraulic damper can support the movement of the main reflecting mirror 11 at a low speed with a small impact.

FIGS. 7 and 8 show a fifth embodiment according to the present invention. Also in this embodiment, the same components as those in the above-described embodiments are denoted by the same reference numerals, and description thereof will be omitted. In the present embodiment, the buffer member 16 of the device of the first embodiment is replaced by a buffer device 56 having a hydraulic damper, and a plurality of buffer members arranged on the outer periphery of the main reflecting mirror 11 as shown in FIG. Three blocks 57
a, 57b, and 57c. The piping 58 of the hydraulic damper is connected to each of the divided groups, and the supporting force of each hydraulic damper in the group is kept constant. This prevents the load from being concentrated on one hydraulic damper.

FIGS. 9 and 10 show a sixth embodiment of the present invention.
Is shown. Also in this embodiment, the same components as those in the above-described embodiments are denoted by the same reference numerals, and description thereof will be omitted. This embodiment is different from the fourth embodiment in that the shock absorbers 46a, 46b, and 46c having the hydraulic dampers are replaced by the shock absorbers 66a, 66b, and 66c having the hydraulic dampers provided with the common piping for each of the three blocks. . A hydraulic pipe 68a led from a first hydraulic damper 66a installed in the radial direction of the main reflector 11 is connected to a hydraulic damper installed in the same block, for example, a radial direction in the block 67a. A uniform oil pressure is generated in the damper. Further, the second and third hydraulic dampers 66b and 66c arranged obliquely are respectively connected to the second and third hydraulic dampers in the block.

The piping 58 of the hydraulic damper is connected to each of the divided groups so that the supporting force of each hydraulic damper in the group is constant. This prevents the load from being concentrated on one hydraulic damper.

FIG. 11 shows a seventh embodiment of the present invention. The structure of the shock absorber of the present embodiment has substantially the same structure as that of the fourth embodiment, and the same components are denoted by the same reference numerals and the description thereof will be omitted. What is characteristic in this embodiment is that the sub-support 75 can be moved in the radial direction of the main reflecting mirror. The sub support 75 can slide on a slide rail 79 provided on the support 12. Therefore, it is normally fixed at a position close to the main reflecting mirror 11 shown in the figure, and is retracted in the direction of the arrow C when performing maintenance and maintenance of the main reflecting mirror 11. by this,
Work such as maintenance and maintenance becomes easy.

FIG. 12 shows an eighth embodiment of the present invention. The structure of the shock absorber of the present embodiment has substantially the same structure as that of the fourth embodiment, and the same components are denoted by the same reference numerals and the description thereof will be omitted. The feature of this embodiment is that the sub-support 75 is rotatably provided on a rotation shaft 89 fixed to the support 12. Normally, it is fixed at a position close to the main reflecting mirror 11 shown in the figure, and is rotated in the direction of arrow D in FIG. . This facilitates operations such as maintenance and maintenance.

In the seventh and eighth embodiments, the fourth embodiment
Although only the case where the present embodiment is applied has been described, it goes without saying that the embodiment can be easily implemented in combination with the other embodiments.

[0036]

As described above, according to the present invention, even if the main reflecting mirror moves greatly due to an earthquake or the like, the action of the buffer mechanism prevents the main reflecting mirror from hitting another structure and being damaged or deformed. This can be prevented.

In particular, according to the third and fourth aspects of the present invention, it is possible to suppress not only the movement of the main reflecting mirror in the radial direction but also the optical axis direction. Further, according to the fifth to seventh aspects of the present invention, desired performance can be obtained by appropriately selecting the cushioning member. Further, in the shape, by adopting a shape suitable for the cushioning member according to the inventions of claims 7 to 10, the range of choices worth more performance is expanded.

Further, according to the inventions described in claims 11 to 13, the workability can be improved at the time of maintenance / inspection / maintenance by making it possible to retract the auxiliary support provided with the buffer mechanism.

[Brief description of the drawings]

FIG. 1 shows a preferred first embodiment of a main reflector supporting device according to the present invention.
It is a top view of an example.

FIG. 2 is a detailed explanatory view of a buffer mechanism of the device of the first embodiment.

FIG. 3 is a view showing a second preferred embodiment according to the present invention, particularly a detailed explanatory view of a buffer mechanism;

FIG. 4 is a view showing a third preferred embodiment according to the present invention, particularly a detailed explanatory view of a buffer mechanism.

FIG. 5 is a plan view of a third embodiment.

FIG. 6 is a view showing a fourth preferred embodiment according to the present invention, particularly a detailed explanatory view of a buffer mechanism.

FIG. 7 is a plan view of a fifth preferred embodiment according to the present invention;

FIG. 8 is a detailed explanatory view of a buffer mechanism according to a fifth embodiment.

FIG. 9 is a plan view of a sixth preferred embodiment according to the present invention;

FIG. 10 is a detailed explanatory view of a buffer mechanism according to a sixth embodiment.

FIG. 11 is a view showing a seventh preferred embodiment according to the present invention, particularly a detailed explanatory view of a buffer mechanism.

FIG. 12 is a view showing a preferred eighth embodiment according to the present invention, in particular, a detailed explanatory view of a buffer mechanism.

FIG. 13 is a view showing a supporting device for a main reflecting mirror of a conventional reflecting telescope, particularly showing a front sectional view thereof.

14 is a view of the main reflecting mirror support device shown in FIG.

FIG. 15 is a diagram showing details of a support structure of the main reflector support device shown in FIG. 13;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 Main reflection mirror 12 Support stand 13 Support structure 13a Thin rod 15, 25, 35, 45, 55, 65, 75, 85 Sub support stand 16, 26a, 26b, 26c Buffer member (rubber) 36a, 36b, 36c Buffer member (Spring) 46a, 46b, 46c, 56, 66a, 66b, 66
c Buffer member (hydraulic damper) 68, 68a, 68b, 68c Hydraulic piping 79 Sliding rail 85 Rotating shaft

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G02B 7/18 G02B 7/00

Claims (12)

(57) [Claims] 1. A main reflector supporting device for supporting a main reflector of a reflecting telescope, comprising: a support for supporting the main reflector via a support member; and a sub-support provided on the support. Interposed between the outer peripheral surface of the main reflector and the sub-support ,
And suppressing damping means radial movement of the reflecting mirror, the possess, the buffer unit, the main reflector, characterized in that it comprises a hydraulic damper supporting device. 2. A main reflection supporting a main reflection mirror of a reflection telescope.
A mirror support device, comprising: a support for supporting the main reflector via a support member; a sub-support provided on the support; and an outer peripheral portion of the main reflector and the sub-support. Intervening loose
And a buffering means , wherein the buffering means is provided between the outer peripheral surface of the main reflecting mirror and the sub-support, and is provided on the outer peripheral portion in a front direction of the main reflecting mirror. A second buffering means provided between the first contact surface and the sub-support, and a second buffer means provided between the second contact surface and the sub-support provided on the outer periphery toward the back of the main reflector. And third buffer means provided. Wherein the first buffer means suppresses the radial movement of the main reflector, and the second and third buffer means move the optical axis of the main reflector in the optical axis direction. A main reflector supporting device, characterized in that the main mirror is suppressed. 3. A main reflection supporting a main reflection mirror of a reflection telescope.
A mirror support device, comprising: a support for supporting the main reflector via a support member; a sub-support provided on the support; and an outer peripheral portion of the main reflector and the sub-support. Intervening loose
Comprises a shock unit, and the outer periphery of the main reflector has a first abutment surface which is arranged obliquely with respect to each of the optical axis and the radial direction of the main reflecting mirror facing the reflector front side, the main reflection A second abutting surface disposed obliquely to each of the optical axis and the radial direction of the mirror and facing the back side of the reflecting mirror; and the buffer means is provided between the first abutting surface and the sub-support. A first buffering means, and a second buffering means installed between the second contact surface and the sub-support, wherein the first and second buffering means allow the main reflecting mirror to move in the radial direction. A main reflecting mirror support device, which suppresses movement and movement in an optical axis direction. 4. The main reflecting mirror support device according to claim 2 or 3, wherein the buffer means main reflecting mirror supporting device which comprises a hydraulic damper. 5. The main reflector supporting apparatus according to claim 2 or 3, wherein the buffer means main reflecting mirror supporting device characterized by comprising a rubber. 6. The main reflecting mirror supporting device according to claim 2 or 3, wherein the buffer means main reflecting mirror supporting device which comprises a spring. 7. The main reflector supporting device according to claim 5, wherein the buffering means has a ring shape provided over the entire circumference of the main reflector. 8. The main reflecting mirror support device according to any one of claims 1 to 6, wherein the buffer means main reflector main reflecting mirror supporting apparatus characterized by being at least three disposed around the . 9. The main reflecting mirror support device according to claim 1 , wherein the buffer means including the hydraulic damper comprises a hydraulic pipe of each damper for each block which equally divides the outer periphery of the main reflecting mirror into three. A main reflector supporting device, wherein 10. wherein the main reflector supporting apparatus claim 8 or 9, wherein the auxiliary support stand main reflecting mirror supporting device, characterized in that a retraction mechanism away from the main reflecting mirror to a predetermined position. 11. The main reflector supporting device according to claim 10 , wherein the retreat mechanism slides the sub-support on a rail provided on the support in a radial direction of the main reflector. A main reflector supporting device, which is a retracting mechanism. 12. The main reflecting mirror support device according to claim 10 , wherein the retracting mechanism is configured such that the sub-support is supported by a rotating shaft fixed on the support, and the sub-support rotates. A main reflecting mirror support device, wherein the main reflecting mirror support device is a retracting mechanism.