JPH0813086B2 - Imaging device - Google Patents

Description

The present invention relates to a photographing device for projecting an image of a document on a microfilm and a reading means.

(Prior Art) As a photographing device as described above, there is a rotary camera. Hereinafter, the camera will be described as an example.

Rotary cameras are used to reduce the size of images of objects such as documents, drawings, bills, checks, stock certificates, and drawings, and record them on microfilm. The images recorded on the microfilm have excellent storability, high density and proof ability, but they require development processing after shooting, and in order to immediately search and edit the input information, electronic files such as electronic files can be used. The combined use of microfilm and electronic files has become necessary due to the superiority of signal-based record retrieval.

Then, the conventional rotary type camera feeds the subject to the photographing position, moves the subject and the microfilm,
The light image is photographed by a film photographing means through an imaging lens, and the optical path is optically divided on the way to the reading means.

(Problems to be Solved by the Invention) Not only can a document as a subject be photographed on a microfilm, but an image of the document can be read by an image sensor, converted into a digital signal, and recorded on a recording medium such as an optical disk. It became so.

In this way, it is possible to record an original in two formats. However, since images of various sizes are projected on the microfilm and the image sensor, the image is projected on a part of the microfilm and the image sensor. There is a problem in that the entire effective recording area of the microfilm and the entire effective reading area of the image sensor are not effectively utilized due to projection outside the area.

An object of the present invention is to solve the above problems and to project an image of a certain size on the microfilm and the reading means regardless of the size of the original document, and the effective recording area of the microfilm and the effective reading area of the reading means. An image can be efficiently projected on the whole, and two kinds of recording formats can easily obtain recorded images with substantially the same resolution.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, in a photographing device that projects an image of a document onto a microfilm and also onto a reading unit, the document is passed through a predetermined path. Along with the transfer means, an optical means for projecting an image of a document being transferred onto the microfilm and the reading means, a magnification changing means for changing the projection magnification of the optical means, and a detecting means for detecting the size of the original. A magnification adjusting means for adjusting the projection magnification of the magnification changing means based on the projection magnification detected by the detecting means so that an image of a certain size is projected on the microfilm and the reading means; and the detecting means. And a control unit for controlling the document transfer speed of the transfer unit based on the projection magnification detected by.

(Operation) In the present invention, the size of the original is detected by the detecting means, and the projection magnification of the optical means for projecting on the microfilm and the reading means is changed based on the size of the original,
The document transfer speed is determined by the projection magnification, and documents of various sizes are projected on the microfilm and the reading means in the same size.

(Example) The present invention will be described below based on the illustrated experimental example.
FIG. 1 shows a rotary camera to which the present invention is applied.
In FIG. 1, reference numeral 1 denotes a camera unit for photographing an image of an original on a microfilm, and an automatic original feeder 2 is installed on the upper portion of the camera unit 1. The automatic original feeder 2 has a check, a bill, and a stock certificate. , Documents 3 such as slips, drawings, and documents are stacked and stored in a container. When the original 3 is present, the original 3 is sent out one by one from the original delivery port 4 by belt feeding or the like, and then on the original size sensor 30 as a detection means arranged in the original delivery port 4. After passing, the width of the original 3 is detected. FIG. 3 is a schematic diagram of the document size sensor 30. When the document 3 passes over the document size sensor 30, both ends of the document 3 are detected, and the detection signals are sent to the signal processing device 32. Then, the detection signal is processed by the signal processing device 32,
It is output as a document horizontal size signal. As shown in FIG. 4, this original document lateral size signal is sent to a magnification variable circuit 41 as a magnification adjusting means, and the magnification variable circuit 41 causes the zoom lenses 13a on the microfilm photographing section side and the reading section side to move. The projection magnification of 13b (hereinafter, simply referred to as magnification) is determined. That is, in order to change the magnification of the zoom lens 13a on the microfilm photographing unit side and the zoom lens 13b on the reading unit side based on the signal from the magnification variable circuit 41, the respective motors 42a and 42b, which are magnification changing means, are used. Drive gear 4
Set to the determined magnification through 5a and 45b. At the same time, the feed speed determination circuit 44 as a control means for controlling the transport speed of the original 3 based on the magnification determined by the variable magnification circuit 41 controls the feed roller drive motor 43 to move the original 3 to a predetermined path. The rotation speed of the feed roller 7 as a moving means for moving along is determined. The feeding speed of the microfilm F as a recording medium can be varied in synchronization with the original feeding speed.

Then, the original 3 is sent to a shooting position between the glass flat plates 8 and 9 in the shooting unit 5 by the pair of feed rollers 7, and then discharged to the tray 10 by the pair of discharge rollers 6. Here, when it is detected that the document 3 is at the photographing position by a document detection unit (not shown), the discharge roller 6 and the feed roller 7
Thus, the original 3 is fed at a constant speed and is illuminated by the lamp 11 that illuminates the original 3. Further, 14 is a slit and 21 is a shutter.

On the other hand, the microfilm F is wound around a reel 16 and is supplied to the take-up reel 20 at a constant speed by a capstan roller 17, a pinch roller 18 and a pair of feed rollers 19 arranged at a photographing position. The capstan roller 17 and the feed roller 19 are connected to a document feeding drive unit (not shown), and supply the microfilm F at a speed equal to the moving speed of the image of the document 3 on the surface of the capstan roller 17. Thereby, the microfilm F as a recording medium
The original is reduced in size.

At the same time when the microfilm F is photographed, the optical image split by the half mirror 12 for optically splitting in the optical path is guided to the reading unit 15 as a reading unit having a solid-state image sensor, and the original is read here. The light information of the image of No. 3 is converted into a corresponding electric signal. That is, the half mirror 12 is an optical unit that projects the image of the document 3 being transferred onto the microfilm F and the reading unit 15. Then, the signal is transmitted to the signal processing device 23 by the signal transmission cable 22.
As the signal processing device 23, an external storage device such as an optical disk or an electronic editing system including a CPU can be considered. As described above, according to the rotary type camera having the reading unit 15, the preservation property of the microfilm and the effectiveness as the official document can be utilized, the image information is read, and the manuscript is immediately edited,
It becomes possible to process classifications on the spot. If a high-density external storage medium such as an optical disk is used, mutual backup with the microfilm can be achieved and the safety can be further improved.

FIG. 2 is a block diagram of the reading unit 15 in the same embodiment. In FIG. 2, reference numeral 26 is a solid-state image sensor (CCD) as a sensor, and a signal electrically converted from light by the solid-state image sensor 26 is amplified by an amplifier 27. And is converted into a digital signal by the binarization circuit 28. 29 is Microfilm F
It is a branch circuit for sending out a synchronizing signal to. Photographing on the microfilm F and the solid-state image pickup device by the synchronization signal
After the completion of both the image capturing by 26, the next document is photographed.

In the above embodiment, the zoom lens 13a,
Although 13b is used, the invention is not limited to this, and an optical system of another type may be used as long as it has sufficient resolution and can change the magnification.

Further, in the above embodiment, the solid-state image sensor is used to obtain the electric information of the image, but a planar sensor or an image pickup tube may be used as long as photoelectric conversion is possible and sufficient resolution is obtained. Further, the optical means for projecting the image of the document being transferred onto the microfilm and the reading means may not be divided by a half mirror or the like, but the microfilm and the reading means may be arranged side by side on the same optical path.

Further, in the above-described embodiment, first, the electric information of the image by the solid-state image pickup device is simply stored in the storage device (signal processing device), and when the image is photographed on the microfilm, only the necessary information is later converted from the electric signal to the optical signal. A configuration in which the reproduction is performed can be considered. In this case, the external connection cable is
It is necessary to be bidirectional, and by doing so, it is possible to capture information after editing with the electronic editing device.

In the above embodiment, the original is moved to perform the exposure scanning, but the original may be stopped and the optical system or the photoconductor and the image pickup device may be moved to perform the scanning.

(Advantages of the Invention) The image pickup apparatus according to the present invention has the above-described configuration and operation, and is configured so that an image of a certain size is projected on the detection unit that detects the size of the document and the microfilm and the reading unit. A magnification adjusting means for adjusting the projection magnification of the magnification changing means for changing the projection magnification of the optical means based on the projection magnification detected by the detecting means; and a document passage in a predetermined path based on the projection magnification detected by the detecting means. Since it has a control unit that controls the document transfer speed of the transfer unit that moves along the document, the document can always be read accurately in the same size when capturing images of various sizes, and the resolution can be set even for small size documents. Is improved, and the efficiency at the time of editing an electronic file or the like can be significantly improved.

Further, the image can be efficiently projected on the effective recording area of the microfilm and the entire effective reading area of the reading means, and the recorded images having substantially the same resolution can be easily obtained by the two types of recording formats.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment in which the image pickup apparatus according to the present invention is applied to a rotary camera, FIG. 2 is a block diagram showing a reading unit in the same embodiment, and FIG. 3 is a document size in the same embodiment. FIG. 4 is a schematic diagram of the sensor, and FIG. 4 is a block diagram for determining the document feeding speed of the reading unit in the embodiment. 1 ... Camera section, 3 ... Original 7 ... Feed roller (transporting means) 12 ... Half mirror (optical means) 13a, 13b ... Zoom lens 15 ... Reading section (reading means) 30 ... Original size sensor (Detection means) 41 ... Magnification variable circuit (magnification adjustment means) 42a, 42b ...... Motor (magnification change means) 44 ...... Feed speed determination circuit (control means) 45a, 45b ...... Gear (magnification change means) F ... … Microfilm

Claims (1)

[Claims] 1. A photographing device for projecting an image of a document on a microfilm and projecting it on a reading means, a transport means for transporting the document along a predetermined path, and a microfilm and a reading means for the image of the document being transported. Optical means for projecting onto the image, a magnification changing means for changing the projection magnification of the optical means, a detecting means for detecting the size of the original, and an image of a certain size are projected on the microfilm and the reading means. Magnification adjusting means for adjusting the projection magnification of the magnification changing means based on the projection magnification detected by the detecting means, and control means for controlling the document transfer speed of the transferring means based on the projection magnification detected by the detecting means. An image pickup apparatus comprising: