JPH0830850B2 - Micro film camera - Google Patents

Description

The present invention relates to a microfilm photographing device.

(Prior Art) Conventionally, as a device for photographing a document such as a bill or a check in which characters and the like are written on both the front surface and the back surface on a microfilm, as shown in FIG. And a rear surface 1b of the original film 1 which is placed between the photographing lens 3 and the original 1 and is illuminated by the illumination system. As shown in FIG. 13 (a), the front surface 1a and the back surface 1b are arranged on the photographing lens 3 so that the microfilm 2 is photographed in a format in which the lengthwise direction of the microfilm 2 is vertically aligned. It has been proposed to provide a guiding mirror system 4, 5, 6.

By the way, when the photographed microfilm is housed in a cassette, the cassette is set in a projection device (microreader), and a desired image on the microfilm is retrieved and enlarged and projected, the surface of the original 1 1a and back 1b
And, as shown in FIG. 13 (b), the microfilm 2
It is preferable that the microfilm 2 is photographed in the vertically arranged format with the width direction of the above as the vertical position.

(Problems to be Solved by the Invention) However, in the photographing apparatus shown in FIG.
Even if the image is taken at an angle of 90 degrees, as shown in FIG. 13 (c), one surface (1a or 1b) is in an inverted state, which makes it difficult to read during magnified projection.

Further, in the above-mentioned device, both sides of the original can be photographed (duplex) at the same time, but in the case of an original in which characters or the like are described only on the front side, the front side is enlarged to an area (double) corresponding to both sides and photographed (simplex). There was a problem that I could not do it.

The present invention has been made in view of the above problems, and it is possible to photograph on a microfilm in a format in which the front surface and the back surface of a document are vertically arranged with the width direction of the microfilm as a vertical position. In addition to using the scan exposure method, both sides of the original can be shot at the same time (duplex), and with a simple mode switching structure, only the front side is enlarged to the area equivalent to both sides (about 2 times) The basic object is to provide a micro film photographing device capable of (simplex).

The specific object of the present invention is to eliminate the difference in the exposure amount of the microfilm, the exposure time, and the power consumption of the original illumination lamp between the double-sided shooting and the single-sided shooting, and the exposure control can be rationalized. It is to provide a device.

(Means for Solving the Problem) Therefore, according to the present invention, a photographing lens for imprinting the front surface and the rear surface of a document on a microfilm, and a photographing lens arranged between the photographing lens and the document and illuminated by an illumination system are provided. A reflection mirror system that guides the front and back light fluxes of the original to the photographing lens so that they are vertically aligned with each other in the vertical direction, an original moving mechanism that moves the original, and a front and back light flux of the moving original. A slit plate that allows a part of the document to pass therethrough, and a photographing lens moving mechanism that moves the photographing lens in synchronization with the movement of the document. The illumination system includes two illumination lamps that illuminate the surface of the document and the document. One illumination lamp for illuminating the back side of the document, and a shield plate that can shield the back side light flux of the document is provided. Only one illumination lamp on the front side of the document and the illumination lamp on the back side of the document when shooting both front and back sides. Lights up, When only the front side is being photographed, only the two illumination lamps on the front side of the document are turned on, and at the same time the back-side light flux of the document is blocked by the shield plate, and the document moving speed and the moving amount and feed amount of the photographing lens are approximately doubled. It is characterized in that a control circuit for controlling is provided.

(Operation and Effect of the Invention) According to the present invention, the front surface light flux and the back light flux of the original are aligned in the vertical direction (upright state) by the reflection mirror system,
Since it is designed so that it is guided to the shooting lens so that it will be in the vertical position (format arranged vertically), the front and back sides of the document are arranged vertically, and both images are taken upright on the microfilm. become able to.

Therefore, it becomes easy to read at the time of magnified projection by the projection device, and the read workability is improved.

Further, according to the present invention, the slit plate allows a part of the front light flux and the back light flux of the document moved by the document moving mechanism to pass therethrough, and the photographing lens moving mechanism moves the photographing lens in synchronization with the movement of the document. In this way, while scanning exposure is performed on the micro film, only one illumination lamp on the front side of the original and the illumination lamp on the back side of the original are turned on by the control circuit during double-sided shooting, and the two on the front side of the original during single-sided shooting. Since only the individual illumination lamps are turned on, the back side light flux of the original is shielded by the shielding plate, and the moving speed of the original and the moving amount and the moving amount of the photographing lens are controlled to be approximately doubled. By simple mode switching of electrical control by the control circuit, both sides of the original can be photographed (duplex) at the same time, and only the front side has an area equivalent to both sides (about 2 times). It is possible to zoom in for shooting (simplex) to. Furthermore, compared to double-sided shooting,
During single-sided photography, the number of illumination lamps on the front side of the document is doubled and the illuminance is doubled.
Therefore, the exposure amount is the same, and the moving feed amount and the feed amount of the original and the photographing lens are about twice, so the exposure time is the same and the number of lighting lamps is 2 in 3 so that the consumption power is low. Therefore, exposure control can be rationalized.

Furthermore, during single-sided shooting, by blocking (cutting) the back-side light flux with a blocking plate, it is possible to prevent the back-side image from overlapping the front-side image, and only the front-side image can be clearly shot on the microfilm.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, a microfilm photographing device 10
Is a photographing lens 3 for imprinting the front surface 1a and the rear surface 1b of the original 1 on the microfilm 2, and the photographing lens 3 and the original 1
And a reflection mirror system M for guiding the front surface light flux a and the back surface light flux b of the document 1 illuminated by the illumination system L to the photographing lens 3 so that they are vertically aligned with each other.
An original moving mechanism 17 for moving the original 1, slit plates 51, 52 for passing a part of the front side light flux a and the rear side light flux b of the moving original 1, and the photographing lens 3 in synchronization with the movement of the original 1. And a photographing lens moving mechanism 53 for moving the lens.

As shown in FIG. 11, the microfilm photographing device 10
Is provided with a case 11 in the shape of a square dark box, and a document insertion tray 12 is provided on an upper part of one side (left side) of the front surface of the case 11,
A document take-out tray 13 is provided in the lower part, and a cover 15 for loading / unloading a cassette 14 (see FIG. 1) containing the unexposed microfilm 2 is provided on the other side (right side) of the front surface of the case 11. Is openable and closable.

-Document Moving Mechanism- As shown in FIGS. 1 and 2, the case 1 is fed horizontally from the inserting tray 12 with the front surface 1a facing upward, and the original 1 is fed vertically, and vertically downward. Back side 1b.
A document moving mechanism 18 is disposed which forms a substantially U-shaped document feeding system path c for feeding to the take-out tray 13 with the sheet facing upward.

As shown in detail in FIGS. 3 and 5, the document moving mechanism 18 includes a series of document guide plates 19, ..., 19 having a gap for guiding the document 1 along the document feeding path c. , And the drive shafts 21 having rubber rollers 20, ..., 20 projecting into the gaps at appropriate positions of the respective document guide plates 19 ,.
, 21 and driven shafts 22, ..., 22 are arranged, and each driven shaft 22, ..., 22 is biased by a spring (not shown) toward the opposing drive shafts 21 ,. Drive shaft 21, ...,
The pulleys 23, ..., 23 provided at the ends of the belt 21 are stretched with timing belts 24 ,.
A timing belt 27 is stretched between 23 and a pulley 26 of a document moving motor 25.

Then, when the motor 25 rotates, the timing belt 2
The driving shafts 21, ..., 21 are simultaneously rotated in the document feeding direction via 4, ..., 24, and the document 1 is guided by the document guide plates 19, ..., 19 by the feeding force of the rubber rollers 20 ,. Meanwhile, the document is fed at a predetermined feeding speed along the document feeding path c.

-Exposure Unit (Illumination System L) -As shown in FIGS. 1 to 3, the document guide plate 1 is provided at a vertically downward portion of the document feeding system path c of the document moving mechanism 18.
A transparent glass plate 30 that guides the original 1 together with 9, ..., 19,
31 is disposed, the front surface 1a of the original 1 faces the glass plate 30 on the right side (back side of the case), and the glass plate 31 on the left side (front side of the case) 31.
The back surface 1b of the document 1 is exposed to the inside.

A first illumination lamp 32 and a second illumination lamp 33 which illuminate the front surface 1a of the original 1 are provided obliquely from below and above the front glass plate 30, respectively. A third illumination lamp 34 that illuminates the back surface 1b of the document 1 from above is provided.

Each of the illumination lamps 32 to 34 has a front surface 1a and a rear surface 1a even when one light is turned on for the front surface 1a and the back surface 1b of the original 1.
It is set so that each 1b can be uniformly illuminated.

Reflecting umbrellas 32a to 34a and sockets 32b to 34b are provided for the respective illumination lamps 32 to 34, and a light shielding plate for guiding the illumination light of the respective illumination lamps 32 to 34 to the surface 1a and the surface 1b.
35, ..., 35 are provided in place.

-Reflection Mirror System M- A first (second) illumination lamp 32 is provided on the rear side of the rear side of the first slit plate 51 arranged so as to face the front glass plate 30.
A first reflecting mirror 37 for reflecting the surface luminous flux a of the surface 1a of the original 1 illuminated by (33) downward is provided, and the first reflecting mirror 37 facing the first reflecting mirror 37 and reflecting the surface luminous flux a forwardly. A two-reflecting mirror 38 is provided, and a third reflecting mirror 39 that faces the second reflecting mirror 38 and reflects the surface light beam a obliquely laterally is provided.

In addition, the second glass which is arranged to face the back glass plate 31.
A fourth reflecting mirror 40 is provided behind the slit plate 52 on the rear side of the slit plate 52 to reflect the back side light flux b of the back side 1b of the original 1 illuminated by the third lighting lamp 34 downward. A fifth reflecting mirror 41 is arranged facing the rear side light flux b backward, and a sixth reflecting mirror 42 facing the fifth reflecting mirror 41 and reflecting the rear surface light flux b obliquely sideways. ing.

The sixth reflecting mirror 42 and the third reflecting mirror 39 are located at the same position so that the front light flux a and the back light flux b can be reflected at different heights in the vertical direction and in the same direction. Are arranged in an X-shape so that is at the upper position and the sixth reflecting mirror 42 is at the lower position (see FIG. 4).

The fourth reflection mirror 40 is arranged so that the back surface light flux b between the back surface 1b of the original 1 and the fourth reflection mirror 40 is tilted slightly downward.

A seventh reflection mirror 43 is provided to face the third reflection mirror 39 and the sixth reflection mirror 42, and to reflect the front surface light beam a in the upper part and the back surface light beam b in the lower part, respectively, obliquely rearward, Opposed to the seventh reflection mirror 43, there is disposed an eighth reflection mirror 44 which reflects the front surface light beam a in the upper part and the back surface light beam b in the lower part, respectively.

A photographic lens 3 having a process head 45 is disposed so as to face the eighth reflection mirror 44, and a cassette 14 accommodating an unexposed microfilm 2 is loaded at an image forming position of the photographic lens 3. ing.

Therefore, the surface luminous flux a on the surface 1a of the document 1 is
The back side light flux b of the back side 1b of the original 1 is reflected by the second, third, seventh, and eighth reflection mirrors 37, 38, 39, 43, 44, and is photographed by the microfilm 2 through the photographing lens 3. 4th, 5th, 6th, 7th,
The light is reflected by the eighth reflection mirrors 40, 41, 42, 43, 44 and is photographed by the microfilm 2 via the photographing lens 3.

The surface light flux a and the back light flux b between the original 1 and the microfilm 2 are set to have the same optical path length.

Due to the arrangement structure of the reflection mirrors 37 to 44, as is apparent from FIG. 1 showing the normal / inverted state of the image in each reflection mirror, the front light flux a and the back light flux b of the original 1 are shown.
Are guided to the taking lens 3 so that they are vertically aligned (upright state) and are in a vertical position (format arranged vertically). Therefore, the front surface 1a and the back surface 1b of the original 1 are shown in FIG. As shown in (b), in the vertically arranged format,
Moreover, both can be photographed on the microfilm 2 in the upright state.

Therefore, it becomes easy to read at the time of magnified projection by the projection device (micro reader), and the reading workability is improved.

In the arrangement structure of each of the reflection mirrors 37 to 44,
The seventh and eighth reflection mirrors 43 and 44 are omitted, and the seventh reflection mirror 4
It is also possible to adopt a configuration in which the taking lens 3 is arranged at the position 3 or a configuration in which the eighth reflecting mirror 44 is omitted and the taking lens 3 is arranged at the position of the eighth reflecting mirror 44.

-Slit Exposure System- As shown in FIGS. 1 to 3, a first slit plate for passing a part of the surface light flux a of the document 1 between the front side glass plate 30 and the first reflection mirror 37. 51 is provided, and a second slit plate 52 is provided between the back glass plate 31 and the fourth reflection mirror 40 to allow a part of the back side light flux b of the document 1 to pass therethrough.

On the other hand, the photographing lens 3 is photographed in detail in FIGS. 6 and 7 so as to be moved from the lower side to the upper side in synchronization with the movement of the document 1 from the upper side to the lower side by the document moving mechanism 18. It is supported by the lens moving mechanism 53.

The photographing lens moving mechanism 53 includes a base 54 attached to the case 11, and a lens block 55 having the photographing lens 3 attached to the base 54 slides up and down while being pressed by pressing springs 65, 65. It is supported freely, and the top plate 56 of the base 54 is also supported.
A screw shaft 58 rotatably supported by a bearing case 57 mounted on one side is screwed to the lens block 55, and a photographing lens moving motor 59 is mounted on the other side of the top plate 56. A timing belt 62 is stretched between the pulley 60 and the pulley 61 of the screw shaft 58.

The movement start position of the photographing lens 3 is the base 54
Is determined by detecting the light shielding plate 64 of the lens block 55 with the photo interrupter 63 of, and when the motor 59 rotates,
The screw shaft 58 is rotated via the timing belt 62, and the screw shaft 58 causes the lens block 55 and the photographing lens 3 to move from the lower side to the upper side to scan-expose the microfilm 2.

As a circuit for synchronizing the movements of the original 1 and the photographing lens 3 in order to perform the scan exposure, as shown in FIG. 10 (a), the reference frequency of the oscillator 68 is set to the PLL control circuit 6
Input to 9,70 and PLL of FG (FREQUENCY GENERATOR) signals of original moving motor 25 and shooting lens moving motor 59.
A control circuit 69, 70 may be used for feedback control of the rotation speed of each motor 25, 59.

Further, as shown in FIG. 10B, the first reference frequency of the oscillator 68 is input to the PLL control circuit 69, and the FG signal of the document moving motor 25 is input to the PLL control circuit 6.
9 to feed back the rotational speed of the motor 25 while inputting the FG signal of the document moving motor 25 to the PLL control circuit 70 as the second reference frequency, and controlling the FG signal of the taking lens moving motor 59 to the PLL control. Circuit 7
It is also possible to employ one that inputs 0 to feedback control the rotation speed of the motor 59.

As described above, the first and second slit plates 51, 52 allow a part of the front side light flux a and the back side light flux b of the document 1 moved by the document moving mechanism 18 to pass therethrough, and from the upper side to the lower side of the document 1. Since the photographic lens moving mechanism 53 moves the photographic lens 3 from the lower side to the upper side in synchronism with the movement so that the microfilm 2 is scan-exposed, the light fluxes a and b are thinned by the scan exposure method. Therefore, the bending of the light fluxes a and b can be made more compact, the entire device 10 can be made smaller, and the components such as the exposure unit (3,30 to 34) and the reflection mirror system (37 to 44) can also be made smaller. Can contribute to cost reduction.

Further, the scanning exposure can be performed not only in the same direction as the feeding direction of the microfilm 2 but also in a right angle direction, and
Scan exposure can be performed while the cassette 14 and the film drive unit are fixed, and the scan exposure can be performed on a predetermined frame on the microfilm 2 in the cassette 14.

Furthermore, by adopting such a scanning exposure method, both sides 1a and 1b of the original 1 are simultaneously photographed (duplex), and only the front surface 1a is cut by the back side light flux b and the scanning of the front surface 1a is extended to correspond to both sides. Area (about 2
It is also possible to enlarge (double) and shoot (simplex).

-Simplex photographing system- That is, as shown in FIG. 3, a backside rotating white frame plate (shielding plate) 76 is disposed in the vicinity of the rear glass plate 31, and the rotating white frame plate is provided.
The white frame plate rotation motor 78 rotates the 76 to a shielding position (solid line position) where the rear surface light flux b of the original 1 can be shielded and a retracting position (two-dot chain line position) where it is not shielded. The back side rotating white frame plate 76 will be described later in detail.

Further, as shown in FIG. 10 (c), while controlling the lighting of the first to third illumination lamps 32 to 34, and controlling the document moving motor 25 and the photographing lens moving motor 59, the double-sided mode is set for single-sided photographing. A control circuit 71 is provided which doubles the moving speed of the document 1 and the moving speed of the photographing lens 3 and the feed amount as compared with the case of photographing.

Then, at the time of duplex imaging (duplex), the control circuit 71 causes the back side white frame plate rotation motor 78 to rotate the back side white frame plate 76 to the retracted position, and at the same time
Among the second illumination lamps 32 and 33, only the first illumination lamp 32 is turned on, and the third illumination lamp 34 on the back side of the document 1 is turned on (two of three lamps).

Then, the front light flux a and the back light flux b of the document 1 moved by the document moving mechanism 18 pass through the first and second slit plates 51 and 52 and are reflected by the first to eighth reflection mirrors 37 and 44. , The microlens 2 is scanned and exposed by the taking lens 3 moved by the taking lens moving mechanism 53, and both sides 1a, 1 of the document 1 are exposed.
b is shot at the same time.

Next, during single-sided shooting (simplex), the control circuit
By the 71, the back side white frame plate rotation motor 78 rotates the back side white frame plate 76 to the shielding position, and only the first and second illumination lamps 32, 33 on the front side of the document 1 are turned on (two lights in three lights). ).

Then, the original 1 which is moved at the double speed by the original moving mechanism 18
Surface light flux a passes through the first slit plate 51, and the first to third,
The taking lens 3 which is reflected by the seventh and eighth reflecting mirrors 37 to 39, 43, 44 and is moved by the taking lens moving mechanism 53 at double speed and double amount.
Then, the microfilm 2 is scanned and exposed, and the surface 1a of the original 1 is magnified by about 2 times and photographed (see FIG. 13 (d)).

In this way, double-sided shooting and single-sided shooting can be selected by a simple mode switching of electrical control by the control circuit 71.

Further, during single-sided shooting, by blocking (cutting) the back side light flux b with the back side white frame plate (shielding plate) 76, the front side image can be prevented from overlapping the back side image, and only the front side image can be clearly displayed on the microfilm 2. You will be able to shoot.

Furthermore, compared with double-sided shooting, the number of illumination lamps on the front side of the original is doubled and the illuminance is doubled during single-sided shooting, but since the scan speed is doubled and the exposure time is halved, the exposure amount is reduced. Are the same, and the moving speed and the feed amount of the original 1 and the photographing lens 3 are about twice, so the exposure time is the same and the number of lighting lamps is 2 in 3 so that the power consumption is the same.
The exposure control can be rationalized.

-White frame photographing system-As shown in FIGS. 1 to 3, fixed white frame plates 74, ..., 74 are provided at both ends of the front glass plate 30 and the back glass plate 31 in the moving direction of the original 1. Are provided respectively.

Further, a front side rotating white frame plate 75 which is rotatable in the moving direction of the original 1 is arranged in the vicinity of the front glass plate 30, and a rotating direction in the moving direction of the original 1 is arranged in the vicinity of the rear glass plate 31. A back side rotating white frame plate 76 is provided.

The rotation of the rotating white frame plates 75, 76 is controlled by the white frame rotating motors 77, 78 between the position shown by the solid line and the position shown by the chain double-dashed line in FIG.

At the beginning, the lower end of the front side rotating white frame plate 75 is the original 1
The back side rotating white frame plate 76 is located at a position that coincides with the tip of the back side light shielding plate b (see the solid line in FIG. 3). This position is detected by a sensor (not shown).

Therefore, the white frame plate rotation motors 77, 78 are controlled by the control circuit 79 shown in FIG. 10 (d) so that the back side rotation white frame plate 76 is synchronized with the movement of the document 1 during double-sided photography. The front side rotating white frame plate 75 is controlled so as to follow the rear end portion of the original 1 and is rotated so as to lead the front end portion of 1.
During single-sided shooting, the back side rotating white frame plate 76 is controlled so as not to rotate, that is, to stop at the position indicated by the solid line in FIG.

Thus, the fixed white frame plates 74, ..., 74 provided on both sides of the original 1 in the moving direction and the rotating white frame plates 75, 76 provided on the front side and the back side of the original 1 are controlled as described above. As a result, conventionally, as shown on the left side of FIG. 8 (b), a background (black due to the dark box shape) inside the apparatus is imprinted around the image photographed on the microfilm 2, and a black frame f ( It is unpleasant to see, but in this proposal, as shown on the right side of FIG. 8 (b), a white frame g is displayed around the image taken by the microfilm 2 in both double-sided shooting and single-sided shooting. Therefore, it is possible to improve the visibility when magnified and projected by the projection device (micro reader).

As shown in FIG. 8 (a), the rotating white frame plates 75, 7
It is also possible to omit 6 and shift the exposed portions of the front surface 1a and the back surface 1b of the original 1 vertically and provide fixed white frame plates 81 and 82 behind them.

In this case, since the scanning timings of the front surface 1a and the back surface 1b of the document 1 are slightly deviated, a shutter for each of the light fluxes a and b is provided, and opening / closing control is performed at different times.

-Density Adjustment System-On the other hand, as shown in FIG. 9 (a), on the extension of the optical axis of the surface luminous flux a to the back side of the original and on the extension of the optical axis of the back luminous flux b to the front side of the original. In addition, the density plate 82,8 with moderate reflection density
You may make it provide 3 respectively.

As described above, by providing the reflection density plates 82 and 83 on the extensions of the respective optical axes of the front surface light beam a and the back surface light beam b, conventionally,
Since the density around the image taken on the microfilm 2 varies, it was unsightly when magnified and projected.
As shown in FIG. 9B, by selecting the densities of the density plates 82 and 83, the peripheral densities (see dots) of the image photographed on the microfilm 2 can be made uniform, and the projection device (micro The visibility at the time of enlarged projection by the reader is improved.

The main purpose of the micro film 2 of the present invention is monochrome photography, and the density adjusting plates 82 and 83 are plates (white to gray to black) having a reflectance such that the film is photographed at an appropriate density at the time of photographing. An achromatic plate is usually used, and the reflectance is higher as it gets closer to white), so long as it is made of any material. When color photography is taken into consideration, a plate having a desired color and darkness on the film 2 may be used as a density adjusting plate.

With the above configuration, the front surface 1a and the back surface 1b of the document 1 moved by the document moving mechanism 17 are illuminated by the illumination system L, and the surface light flux a and the back light flux b are passed through the slit plates 51 and 52 and reflected. The mirror system M aligns the vertical direction so that the light is reflected so as to be in the vertical position, and the photographing lens 3 moved by the photographing lens moving mechanism 53 projects the image on the microfilm 2 by slit exposure.

Therefore, the front surface 1a and the back surface 1b of the original 1 are arranged vertically, and the microfilm 2 is in an upright state.
Can be photographed (see Fig. 13 (b)).

Also, by switching the mode by the control circuit 71, double-sided shooting (duplex) and single-sided shooting (simplex) can be selected.

Furthermore, the rotating white frame plates 75 and 76 allow the white frame g to be imprinted around the image photographed on the microfilm 2, and the density adjusting plates 82 and 83 adjust the peripheral density of the image. be able to.

[Brief description of drawings]

FIG. 1 is a perspective view of a microfilm photographing apparatus according to the present invention, FIG. 2 is a side view of the apparatus shown in FIG. 1, and FIG.
FIG. 4 is a plan view of FIG. 2, FIG. 5 is a perspective view of an original moving mechanism, FIG. 6 is a perspective view of a photographing lens moving mechanism, and FIG. 7 is a perspective view of FIG. FIG. 8A is a sectional view of a modified example of the white frame imprinting mechanism, and FIG. 8B is a front view of a microfilm in which a black frame and a white frame are imprinted, and FIG. FIG. 9A is a sectional view of the density adjusting mechanism, and FIG. 9B is a front view of the density-adjusted microfilm.
10 (a) and 10 (b) are respectively a synchronous control circuit diagram of the original and the photographing lens, FIG. 10 (c) is a switching control circuit diagram of double-sided photographing and single-sided photographing, and FIG. 10 (d) is White frame imprinting control circuit diagram, FIG. 11 is a perspective view of a microfilm photographing device, FIG. 12 is a perspective view of a conventional microfilm photographing device, and FIGS. 13 (a) and 13 (c) are conventional devices. The front view of the microfilm photographed in Fig. 13, and Figs. 13 (b) and 13 (d) are front views of the microfilm photographed by the device of the present invention. 1 ... Original, 1a ... Front, 1b ... Back, 2 ... Microfilm, 3 ... Shooting lens, 10 ... Microfilm photographing device, 11 ... Case, 14 ... Cassette, 17 ... Move original Mechanism, 19 ... Original guide plate, 22 ... Original moving motor, 30, 31 ... Glass plate, 32-34 ... Illumination lamp, 37-3
4 …… Reflecting mirror, 51,52 …… Slit plate, 53 …… Shooting lens moving mechanism, 89 …… Shooting lens moving motor, 71,79…
... Control circuit, 74 ... Fixed white frame plate, 75,76 ... Rotating white frame plate, 77, 78 ... White frame plate rotation motor, 82, 83 ... Density adjusting plate, a ... Surface luminous flux, b ... … Backside luminous flux, c …… Document feed path.

Claims (1)

[Claims] 1. A photographing lens for imprinting a front surface and a back surface of a document on a microfilm, and a front light flux and a back light flux of a document which are arranged between the photographing lens and the document and which are illuminated by an illumination system. A reflection mirror system that guides the photographing lens so that the top and bottom directions are aligned so as to be in a vertical position, a document moving mechanism that moves the document, a slit plate that allows a part of the front light flux and the back light flux of the moving document to pass through, A lighting lens moving mechanism that moves the shooting lens in synchronization with the movement of the document, and the illumination system includes two illumination lamps that illuminate the front surface of the document and one illumination lamp that illuminates the back surface of the document. Since there is a shield plate that can block the back side light flux of the original, only one illumination lamp on the front side of the original and the illumination lamp on the back side of the original are lit when shooting both front and back sides, and the front side of the original when shooting only the front side. Side 2 Is provided with a control circuit for simultaneously illuminating only the illuminating lamp of the document and blocking the back-side light flux of the document with the shielding plate, and controlling the document moving speed and the moving amount and the feeding amount of the photographing lens to approximately double. Characteristic micro film photographing device.