JPH08271990A - Image projection copying machine - Google Patents

Abstract

(57) [Summary] [Purpose] In a conventional reader printer with an automatic search function, the device is enlarged or complicated due to the provision of a shutter and its driving device that prevent the movement of the film from being projected on the screen during the search. To improve the problem of computerization. [Structure] A film (1) is conveyed to search for a desired image, and this image is projected on a screen (12) for observation, or this image is scanned and exposed on a printer unit (30) to form a copy image. The image projection copying apparatus to be obtained has moving mirrors (21, 22) that move for scanning exposure, and at the time of search, the mirrors block the projection light to the screen, and suppress the enlargement of the apparatus. The operator's discomfort due to projection light is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image projection copying apparatus having an automatic search function for automatically searching for a desired frame on a microfilm.

[0002]

2. Description of the Related Art A typical example of the above-mentioned apparatus is a reader printer equipped with a micro roll film carrier with a search function.

Further, as a frame search method in this type of apparatus, a frame number designated in advance by the operator is calculated by counting the search marks provided in the vicinity of each frame on the film.・ There are some which judge the image area and non-image area on the film and count the number of frames to calculate. In any case, these are performed by moving the film (image) with respect to the fixed sensor.

For this reason, in the reader printer having the automatic search function, the movement of the film (image) is projected on the screen during the search, which causes the operator to feel uncomfortable.

Therefore, a method has been devised in which a shutter is provided in the vicinity of the light exit side of the projection lens and the shutter is made to function during frame search so that an image is not projected on the screen.

However, in this method, since a place for arranging the shutter and its driving device is required, the size of the device is increased, and these also become a cost negative factor.

Further, since the optical path downstream from the shutter is completely shut off during the frame search, that is, during the shutter operation, ・ Autofocus ・ Automatic discrimination of negative and positive images ・ Detection of image size ・ For automatic exposure control It becomes impossible to perform the work of taking in a part or all of the projection light into the photoelectric conversion element, such as taking in the light amount of. This has been a hindrance to the operating speed UP of the device.

The present invention solves the conventional problems described above, and the mirror for forming the printer optical path is advanced to a position where the reader optical path is blocked at the time of frame search, whereby the image during the frame search is projected on the screen. To provide an image projection copying apparatus capable of preventing an increase in the size of the apparatus and performing auto-focus etc. by using the mirror at the time of searching to improve the workability of the apparatus as a whole. With the goal.

[0009]

In order to achieve the above-mentioned object, a reader printer according to the present invention enters a printer optical path forming mirror that is retracted outside a projection optical path at the time of a reader to a position where the reader optical path is blocked at the time of frame search. By doing so, the image during the frame search is prevented from being projected on the screen. Correspondence with claims is as follows.

(1) In an image projection copying apparatus in which a film is conveyed to search for a desired image and the image is projected on a screen for observation, or the image is scanned and exposed on a printer unit to obtain a copied image. , For scanning exposure,
It has a moving mirror that moves, and blocks the light projected on the screen during searching so as not to make the operator feel uncomfortable.

(2) In an image projection copying apparatus in which a film is conveyed to search for a desired image and this image is projected on a screen for observation, or this image is scanned and exposed on a photosensitive member to obtain a copied image. It has a moving mirror that moves for scanning exposure and a shutter that shields the photoconductor from external light. During exposure scanning, the shutter is open, and when searching, the moving mirror projects light onto the screen. And the shutter is closed to protect the photoconductor.

(3) In an image projection copying apparatus in which a film is conveyed to search for a desired image and the image is projected on a screen for observation, or the image is scanned and exposed on a printer unit to obtain a copied image. , For scanning exposure,
It has a moving mirror that moves, and at the time of search, the mirror switches the projection optical path to the screen and guides the projection light to an optical sensor to perform other work in parallel with the search work.

(4) In an image projection copying apparatus in which a film is conveyed to search for a desired image and this image is projected on a screen for observation, or this image is scanned and exposed on a photosensitive member to obtain a copied image. , Has a moving mirror that moves for scanning exposure and a shutter that shields the photoconductor from external light and has one surface composed of a reflective surface.
The shutter is in an open state, and at the time of search, the movable mirror blocks the projection light on the screen, and the shutter is in a closed state, and the reflective surface of the shutter guides the projection light to the optical sensor.

[0014]

2 and 3 are schematic views of a reader printer adopting the present invention.

Reference numeral 1 is a roll-shaped microfilm, 2 is a projection lens, and 3 and 4 are an illumination lamp and a spherical reflecting mirror for illuminating the microfilm 1.

The illumination light of the lamp 3 is reflected by the illumination light reflecting mirror 5.
Then, the light is guided to the microfilm 1 by the condenser lens 6. Reference numerals 7 and 8 are leader mirrors forming a leader optical path 10.

Numerals 21 and 22 are print mirrors forming the printer optical path 11, and are housed in the scan case 23 so as to form a right angle with each other. The scan case 23 moves in the vertical direction (by a driving unit (not shown)) with respect to the reader optical path in order to expose and scan the image.

Around the photosensitive drum 30, well-known image forming means such as a charging device, a developing device and a transfer device (not shown) are arranged, and copying is performed on the copy paper 32 by an electrophotographic method. Reference numeral 31 is a paper feed cassette, and 33 is a paper discharge tray. Three
Reference numeral 7 denotes a drum shutter, which is normally closed to protect the photosensitive drum 30 from outside light.
Rotate around 8 to guide projection light to drum 30.

At the time of the reader, the scan case 23
2 is stationary at a position behind the mirror 8 as indicated by the solid line in FIG. 2, and the image light of the microfilm 1 passes through the projection lens 2 and the screens 12 through the mirrors 7 and 8.
Projected on.

At the time of printing, when the scan case 23 moves in the direction of arrow 24 shown in FIG. 2 and reaches the exposure start position shown by the broken line (by clutch means (not shown)), it reverses from that position in the direction of arrow 25. While moving, the image light of the microfilm is scanned and exposed on the photosensitive drum 30 via the mirrors 21 and 22. At this time, the shutter 37 opens at the same timing as the start of scanning exposure.

When the scanning exposure is completed, the shutter 37 is closed, but the scan case 23 continues to move thereafter, and stops when it reaches the solid line position.

A one-dimensional image sensor (CCD or the like) may be arranged in the exposure section, and a copy image may be obtained by the output of the image sensor and a laser beam printer.

Next, the search will be described with reference to FIGS.

First, when the operator inputs the address of a desired image with an input means (not shown) and commands a search execution,
The mirror 21 moves from the retracted position to the position (A) where it blocks the optical path of the reader and stops. This allows screen 1
The projected image on 2 disappears.

After that, while the retrieval machine 40 conveys the microfilm 1 at a high speed (by the film conveying means (not shown)), the mark detecting means (not shown) detects and counts the marks, and based on the count value. A desired image is searched for and made to stand on the projection unit below the projection lens 2.

Next, the mirror 21 is moved to a predetermined retracted position (B).
The desired image is projected on the screen 12 by recurring to.

If the projection light enters the photosensitive drum 30 during the search, the sensitivity is deteriorated, so that the shutter 37 remains closed during the above operation. Since the details of the searcher are publicly known, the description thereof will be omitted.

As described above, according to the present embodiment, the mirror for forming the printer optical path can be made to enter the position where the reader optical path is blocked during the frame search to prevent the image during the frame search from being projected on the screen. Therefore, it is possible to prevent the apparatus from being upsized due to the conventional equipment such as the shutter and its driving device.

In the present invention, since the reader optical path is blocked by using a mirror (for printing), a new optical path can be formed by utilizing this mirror at the time of searching.

For example, by forming an optical path for taking the image light into the photoelectric conversion element, it is possible to: -autofocus-automatic discrimination between negative image and positive image-detection of image size-projection light such as taking in light quantity for automatic exposure control It is possible to carry out a work such as importing a part (or all) of the data in parallel with the search work.

Conventionally, these operations are performed separately from the search operation, and if the above-mentioned operations become possible, the workability of the apparatus as a whole will be improved.

FIG. 4 shows a second embodiment of the present invention including the above.

Reference numeral 41 denotes a drum shutter, which has a light-reflecting surface on one side and, when closed, functions to switch the optical path so that the printer projection is projected onto the photoelectric conversion element section 43.

The other points are the same as those in the above-mentioned embodiment, and the description thereof will be omitted.

The operation of the reader and the printer is exactly the same as that of the conventional example, and the description thereof will be omitted.

Next, the search will be described with reference to FIGS.

First, when the operator inputs the address of a desired image with an input means (not shown) and commands the execution of retrieval,
The mirror 21 moves from the retracted position (B) to the position (A) that blocks the optical path of the reader, and stops. As a result, the projected image on the screen 12 disappears, and the light projected on the screen is projected on the photoelectric conversion element unit 43 via the mirrors 21 and 22 and the reflection surface of the shutter 41.

After that, the searcher 40 starts to convey the microfilm 1 in order to search for a desired image. At this time, since the microfilm image being conveyed is projected on the photoelectric conversion element section 43, the optical data of the desired image can be captured.

In other words, processing that requires optical data, such as: autofocus, automatic discrimination of negative and positive images, detection of image size, capture of light quantity for automatic exposure control, is performed at this point. The searched image is held still on the projection unit below the projection lens 2.

Next, the mirror 21 is moved to a predetermined retracted position (B).
The desired image is projected on the screen 12 by recurring to.

As described above, according to the present embodiment, during the search for a desired microfilm image, the image is projected onto the photoelectric conversion element, the optical data is taken in, and a process requiring the optical data such as autofocus can be performed. As a result, the operating speed of the device can be increased.

[0042]

As described above, according to the present invention, it is possible to eliminate the image movement at the time of film search from the screen with a simple structure. Can be reduced.

Further, according to the present invention, in parallel with the search operation, a part of the projection light, such as: auto focus, automatic discrimination of negative image and positive image, detection of image size, light quantity capture for automatic exposure control, etc. Since (or all) processing can be carried out by incorporating (or all) into the photoelectric conversion element, it is possible to improve the working speed of the apparatus as a whole.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of a reader printer with a searcher to which the present invention is applied.

FIG. 2 is a diagram illustrating the printing operation.

FIG. 3 is a flowchart showing an operation at the time of search.

FIG. 4 is a schematic configuration diagram of a second embodiment.

FIG. 5 is a flowchart showing an operation at the time of searching in the second embodiment.

[Explanation of symbols]

1 ... Film 2 ... Projection Lens 7 ... Reader Mirror 8 ... Leader Mirror 12 ... Screen 21 ... Print Mirror 22 ... Print Mirror

Claims (4)

[Claims] 1. An image projection copying apparatus which conveys a film to search for a desired image and projects the image on a screen for observation, or scans and exposes this image on a printer unit to obtain a copied image. An image projection copying apparatus having a moving mirror that moves for scanning exposure and blocking the projection light onto the screen during retrieval. 2. An image projection copying apparatus which conveys a film to search for a desired image, projects the image on a screen for observation, or scans and exposes the image on a photoconductor to obtain a copied image. For scanning exposure, it has a moving mirror that moves and a shutter that shields the photoconductor from external light. During scanning, the shutter is in an open state, and when searching, the moving mirror projects light projected on the screen. An image projection copying apparatus characterized in that the shutter is closed as well as being shut off. 3. An image projection copying apparatus which conveys a film to search for a desired image and projects the image on a screen for observation, or scans and exposes this image on a printer unit to obtain a copied image. An image projection copying apparatus having a moving mirror for scanning exposure, which switches a projection optical path to a screen and guides the projection light to an optical sensor at the time of searching. 4. An image projection copying apparatus which conveys a film to search for a desired image and projects this image on a screen for observation, or scans and exposes this image on a photoconductor to obtain a copied image. For scanning exposure, it has a moving mirror that moves, and a shutter that shields the photoconductor from external light and has one side composed of a reflective surface.The shutter is opened during exposure scanning, and the shutter is opened during search. An image projection copying apparatus, wherein a movable mirror blocks light projected on a screen, the shutter is closed, and a reflection surface of the shutter guides the projected light to an optical sensor.