JPS63100863A - Photographing device - Google Patents

Abstract

PURPOSE:To simplify structure and to obtain a sharp recording by providing an incident luminous quantity splitting means setting the split ratio of luminous quantity led to both a recording medium and a picture read means in an optical path based on each exposure sensitivity of a recording medium and a picture read means. CONSTITUTION:A light image split by a half mirror 12 to split the light optically in an optical path at the same time with the photographing of a microfilm F is led to a read section 15 as a picture read means having a solid-state image pickup element 26, where the optical information of picture of an original 3 is converted into a corresponding electric signal. Since an incident luminous quantity splitting means (half mirror)12 splitting the incident light into both the microfilm F as a recording medium and the solidstate image pickup element 26 in response to the ratio of the film F and the element 26 of the read section 15 in the light sensitivity is arranged, the two recordings of the microfilm F by one luminous quantity setting means and the picture information by the electric signal are applied by proper exposure.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention projects an image of a document onto a recording medium such as a microfilm through an imaging means, and optically projects the image onto an image reading means within this optical path. It relates to a photographing device that guides images.

(Prior Art) An example of the above-mentioned photographing device is a rotary camera. Seven examples of such cameras will be explained below.

A rotary camera is used to reduce and record on microfilm the images of documents such as documents 1 drawings 9 bills, checks 9 stock certificates 9 drawings caps. While images recorded on microfilm have excellent storage stability, high density, and evidence-worthiness, they require processing after they are taken, and in order to instantly search and edit input information, it is difficult to use electronic files or other electronic files. Since record retrieval using signals is at fG level, it has become necessary to use microfilm and electronic files in combination.

Conventional rotary cameras feed the subject to the photographing position, move the subject and microfilm, and photograph the optical image on the film photographing means through the imaging lens. The image was divided optically and guided to an image reading means.

(Problem to be solved by Problem No. 11) By the way, in the above-mentioned rotary camera as a conventional photographing device, in order to obtain proper exposure, light reflected from the document, which is the subject, is used to capture the document! It is already known to adjust the light intensity of the lamp, but when the film photographing means and the image reading means are used together, the exposure sensitivity of the two is not the same, so Exposure adjustment mechanisms that operate independently are required for each of the reading means.

As a result, there has been a problem in that the number of parts increases, the structure becomes complicated, and the cost increases.

Therefore, the present invention has been made to solve the above-mentioned problems of the conventional example, and its purpose is to simplify the structure and ensure that both the recording medium and the image reading means are always properly exposed! '# Our objective is to provide a photographing device that can perform comprehensive recording.

(Means for Solving the Problems) In order to achieve the above object, the present invention projects an image of a document onto a recording medium via an imaging means, and
A photographing section optically guides the image to the image reading means within this optical path, and the incident light j sets the division ratio of the amount of light guided to the recording medium and the image reading means based on the respective exposure sensitivities of the recording medium and the image reading means. , 1-minute, I, 11 means are arranged in the optical path.

(Function) In the present invention having the above configuration, an incident light amount splitting means is arranged in the optical path to set a splitting ratio of the amount of light guided to the recording medium and the image reading means based on the respective exposure sensitivities of the recording medium and the image reading means. By setting it up, is it easy? It has an i structure and performs appropriate exposure corresponding to the sensitivity ratio of the recording medium and the image reading means.

(Embodiment) The present invention will be explained below based on the illustrated embodiment. Fig. 1 shows a rotary camera to which the present invention is applied. This is a camera section for taking pictures, and two automatic document supply bags are installed on the top of this camera section l, and one check and one bill are placed in each two automatic document supply bags.

Documents 3 such as stock certificates, slips, drawings, and submissions are stacked and stored in a container. When the a document 3 is present, the document 3 is fed one by one from the document feed port 4 by belt feeding or the like, and is sent to the shooting position between the glass flat plates 8 and 9 in the shooting section 5 by a pair of feed rollers 7. is,
Next, the paper is discharged onto the tray 10 by a pair of discharge rollers 6. Here, when the document detection means (not shown) detects that the document 3 is at the photographing position, the document 3 is fed at a constant speed by the ejection roller 6 and the feed roller 7, and is illuminated by the lamp 11 that illuminates the document 3. Ru. At this time, the amount of light reflected from the document 3 is measured and detected by the light amount sensor 24, and exposure correction, which will be described later, is performed.

13 is a projection lens as an imaging means; 14 is a slit;
21 is a shutter, and 25 is an aperture.

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

Further, at the same time as the microfilm F is photographed, the optical image divided by the half mirror 12 for optically dividing the light in the optical path is led to a reading section 15 as an image reading means having a solid-state image sensor, where it is The optical information of the image of the original document 3 is converted into a phased electrical signal.Then, the signal is transmitted to the signal processing device 23 via the signal transmission cable 22.

As the signal processing device 23, an external storage device such as an optical disk, an electronic editing system equipped with a CPU, etc. can be considered.

In this way, the rotary camera equipped with the reading unit 15 makes it possible to take advantage of the preservation properties of microfilm and its effectiveness as an official document, as well as to read image information and perform instant editing, nine classifications, etc. of manuscripts on the spot. becomes usable. Furthermore, if a high-density external storage medium such as an optical disk is used, mutual backup with microfilm can be achieved and safety can be further improved.

FIG. 2 is a plot diagram of the reading section 15 in the same embodiment, and in the same figure, 26 is a solid-state image sensor (CCD);
A signal converted from light to electricity by the solid-state image sensor 26 is amplified by an amplifier 27 and converted into a digital signal by a binarization circuit 28. 29 is a branch circuit for sending a synchronizing signal to the microfilm F. The synchronization signal causes photographing on the microfilm F and the solid-state image sensor 26.
After both image capture operations are completed, the next document is photographed.

FIG. 3 is a block diagram showing the exposure correction circuit in the same embodiment.
Assuming that the sensitivity ratio of the solid-state image sensing devices 26 of No. 5 is 2:1, they are configured to have reflection and transmittance such that the amount of light guided to each of them is 1:2. Further, in general, original documents each have shading, and the light intensity sensor 24 measures the shading of the original. Based on the signal from the light amount sensor 24, an appropriate aperture value is determined by an aperture setting circuit 31, and by moving a lever or the like of the aperture 25, an appropriate aperture position is determined.

Therefore, the rotary camera in the above embodiment has a microfilm F as a recording medium and a reading section 15 in the optical path.
Since seven stages of incident light amount division are provided to divide the incident light into both of them in accordance with the ratio of the photosensitivity of the solid-state image sensor 26,
With one light amount setting means, it is possible to perform two recordings, one on the microfilm F and the other on image information based on electric signals, with proper exposure.

It should be noted that the present invention is not limited to the above-mentioned embodiments; for example, microfilm was used as the recording medium, but it can also be applied to photosensitive drums and the like. In addition, although a solid-state image sensor was used to obtain the electrical information of the image, other devices may be used as long as optical center conversion is available and a sufficient resolution moat is obtained, and a half mirror splits the incident light. If the ratio is not constant and can be set by an external signal tt, the film sensitivity setting is not limited to recording media and reading sections that have sensitivity ratios as in the above embodiment, but also when the sensitivity of microfilm F is different, for example. Since the incident light intensity division of the half mirror can be changed with a switch, it is possible to use a variety of recording media and reading sections, and the half mirror can be set for total transmission or total reflection. It is also possible to select whether to record on a recording medium or with a solid-state image sensor.

The light amount sensor may be selected appropriately taking into consideration the characteristics of the microfilm and solid-state image sensor as recording media.
The installation position is not limited to the above embodiment, and may be any position where reflected light from the original or transmitted light from the transparent original can be obtained without interfering with exposure.

Further, the diaphragm may be a conventional mechanically driven diaphragm, or may be electrically operated, such as partially shielded by liquid crystal.

Furthermore, in the above embodiment, exposure scanning is performed by moving the document, but even if the p: A type photoreceptor and an image sensor may also be used.

(Effects of the Invention) The photographing device according to the present invention has the above-described configuration and operation, and the incident light intensity is set based on the exposure sensitivity of the recording medium and the image reading means to set the division ratio of the amount of light guided to the recording medium and the image reading means. By arranging the light amount splitting means in the optical path, the structure is simplified, and both the recording medium and the image reading means are always properly exposed and clear recording is possible. Furthermore, the simplified structure has the effect of reducing the number of parts and reducing costs.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment in which the photographing device according to the present invention is applied to a rotary camera, Fig. 2 is a block diagram showing a reading unit in the embodiment, and Fig. 3 is an exposure diagram in the embodiment. It is a block diagram of a correction means. Explanation of symbols 1...Camera section 3...Document 12...Half mirror (incident light amount dividing means) 13...1j! Shadow lens (imaging means) 15... Reading section (image reading means) 24... Light amount sensor 25... Aperture 26...
Solid-state image sensor F...Microfilm (recording medium) Figure 1 Figure 2

Claims (1)

[Claims] In a photographing device that projects an image of a document onto a recording medium via an imaging means and optically guides the image to an image reading means within this optical path, the image capturing apparatus is configured to perform a method based on the respective exposure sensitivities of the recording medium and the image reading means. 2. A photographing device characterized in that an incident light amount splitting means is disposed within the optical path to set a splitting ratio of the amount of light guided to both of them.