JPH0213934A - Reader printer - Google Patents

Abstract

PURPOSE:To easily set an effective image region and to miniaturize the title device by disposing a filter which is near the image recording medium side compared with a projecting lens and transmits only a specific wavelength region of visible light to the common optical path at reading time and printing time. CONSTITUTION:The title device consists of a reading part A and a printing part B. The image light transmitted through the filter 20 is discolored by disposing the filter 20 which transmits only the specific wavelength region to the common optical path at the reading time and the printing time, and the valid image region and an invalid image region are color coded. Thus, the valid image region is easily set, and the compact reader printer is obtained.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a reader unit that projects image information of an information recording medium such as microfilm or photographic film onto a screen, and a reader unit that projects image information on an image recording medium such as microfilm or photographic film. The present invention relates to a reader printer having a printer section for recording data.

(Prior Art) Conventionally, reader printers have been used in the following three ways for the purpose of preventing toner from adhering to non-image areas, suppressing wasteful toner consumption, and copying only a specific image area that is arbitrarily designated. Measures are being taken. That is, the first means is limited to the case of taking a positive copy image from a negative original image, but it has an aperture corresponding to the size of the image, and a shutter with a variable aperture is provided in the optical path to remove unnecessary images. There is a way to close the shutter to block light in the area.

Further, the second means specifies a desired image area by a predetermined input means, and based on the signal of the specified image area,
It is a means of control. The control method differs depending on the type of original image, and in the case of a positive copy image from a negative original image,
A shutter provided in the image exposure section blocks light from the invalid image area to form an invalid image area. In addition, in the case of a positive copy image from a positive original image, an exposure device is installed between the blower and the developer, and the exposure device exposes the surface of the photosensitive drum when the invalid image area on the photosensitive drum passes. This prevents toner from adhering to invalid image areas.

Furthermore, a third means is to provide a filter that is located upstream of the projection lens on the optical path and is movable near the lamp irradiation opening in the carrier that holds the film, and color-codes the effective image area and the ineffective image area. By using a photosensitive drum that is insensitive to the wavelength range that passes through the filter, invalid image areas are prevented from forming electrostatic latent images on the photosensitive drum.

(Problem to be Solved by the Invention) However, in such conventional technology, when the means for shielding the opening of the first image from light using a shutter, the masked portion of the image on the screen is hidden and cannot be seen, so that the film If you want to move the upper image and view another image on the screen, first open the shutter fully, move the next film image onto the screen, and then close the shutter again to view the desired effective image. There was a problem in that it took time and effort to create areas.

Further, in the means for specifying the second effective image area by a signal, it is difficult to establish a one-to-one correspondence between the area specified by the signal input and the real image projected on the screen.
In order to set the effective image area by inputting a predetermined matrix, an index indicating the predetermined matrix is required on the screen, which poses a problem of increased cost.

Furthermore, in the method for color-coding by providing a film in a carrier that holds the third film, the structure of the carrier becomes large because a mechanism for moving the filter is added to the carrier. Furthermore, since the filter is moved near the original film image, the amount of filter movement is reduced by the amount of lens magnification compared to the movement on the screen, which poses the problem of making fine adjustment of filter positioning difficult. be.

Therefore, the present invention has been made to solve the above-mentioned problems of the prior art, and its purpose is to provide a reader printer that can easily set the effective image area, reduce costs, and reduce the size of the reader printer. It is about providing.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a reader unit that projects image information of an information recording medium onto a screen, and a reader unit that projects image information of an information recording medium onto a screen. In a reader printer having a printer section that exposes and records, a filter that is arbitrarily movable is disposed closer to the image recording medium than the projection lens that projects the image information and within a common optical path during reading and printing, It is constructed by color-coding effective image areas and invalid image areas on the screen.

Further, a second filter that blocks the wavelength light transmitted by the filter and a third filter having the same characteristics as the filter are provided in the print-only optical path, and the print-dedicated optical path is provided with the second filter. It is configured such that it can be put in and taken out by switching the third filter.

(Function) In the present invention having the above configuration, a filter that transmits only a specific wavelength range is disposed on the image recording medium side from the projection lens and in the shared optical path during reader and printing. It changes the color of the image light,
The effective image area and the invalid image area are separated by color on the screen.

Further, the second filter, which does not transmit the wavelength light in the region that the filter transmits, and the third filter, which has the same characteristics as the filter, are arranged to be switchable so as to enter the optical path exclusively for printing. When the second filter enters the print-only optical path, the filter passage area set by the filter is formed as an invalid image area in the copied image, and the switching means causes the third filter to enter the print-only optical path. When two filters are saved, the designation of the invalid image area set by the filter is ignored, and the entire effective area of the image projected on the screen is copied.

(Example) The present invention will be explained below based on the illustrated example. Second
The figure is a schematic configuration diagram of a microfilm reader printer to which the present invention can be applied. In the figure, A is a reader section, B is a printer section, F is a microfilm as an information recording medium, 1 is a halogen lamp for projection, Reference numeral 2 is a reflecting plate made of a spherical mirror, 3 is a reflecting mirror, 4 is a condensing lens, 5 is a projection lens, 6, 7, 8.9 are reflecting mirrors, and 10 is a projection screen. Further, reference numerals 11 and 12 are scanning mirrors arranged at 90 degrees to each other, and 13 is a photosensitive drum as an image recording medium. The photosensitive drum 13 has uniform sensitivity in the visible light region. The above scanning mirror 1
1.12 can be moved in the direction of arrow R or W,
Normally, it is retracted to a position away from the projection optical path C in the direction of arrow W. During printing, it moves in the R direction and is located at the start position in the optical path C, then moves in the W direction, enters the optical path B, and enters the optical path B. As shown in FIG. 6, the image on the line segment 0-0, the image on the line segment PP, and the image on the line segment Q-Q are sequentially scanned and exposed onto the photosensitive drum 13 through the slit 14.

In addition, in FIG. 3, the photosensitive drum 13 is connected to the primary charger 2.
2, the surface thereof is uniformly charged and subjected to the above-described image exposure at the exposure section, forming an electrostatic latent image corresponding to the film image. The toner 24a in the developing device 24
The developed toner image is transferred to a transfer charger 25.
The toner image is transferred onto a transfer material 27 by a fixing device (not shown), and the toner image on the transfer material 27 is fixed. On the other hand, the toner remaining on the photosensitive drum 13 is removed by a cleaner device 26.
Further, the potential on the photosensitive drum 13 is removed by the pre-exposure lamp 21, and the process returns to the first step. Incidentally, above the slit 14, an optical sensor S l''' S of a photoelectric conversion element group 15 using amorphous silicon or the like is placed near the slit along the longitudinal direction of the slit.
n are arranged at predetermined intervals, and the optical sensors S1 to So are driven by a drive motor (not shown) to scan the photosensitive drum 13 in synchronization with the movement of the scanning mirror 11.12 in the R direction (pre-scan) on the optical path B. scan the exposed area. Also,
As shown in FIG. 3, a blank exposure device 23 is disposed between the exposure section and the development device 24, and L E D L
, -Lo are attached toward the surface of the photosensitive drum 13 at predetermined intervals in the axial direction of the photosensitive drum 13.

FIG. 1 shows a filter device of the present invention installed in the above-mentioned microfilm reader printer, which has four filters and is located downstream of the projection lens 5 and in the shared optical path C during reading and printing. , a filter 20C2 movable in the GH direction parallel to the moving direction of the scanning mirror 11.12 over the aperture F' corresponding to the filter image.
20d and I perpendicular to the direction of movement of the scanning mirror 11.12.
- Filter 20a movable in the J direction.

20b.

The filter 20a is bonded to a slide plate 30a, and a rack 31a mounted on the slide plate 30a meshes with a gear 32a mounted on a shaft 38a.
Manual rotation from the knob 37a attached to the shaft 36a is transmitted to the shaft 38a through the meshing of the bevel gear 35a attached to the shaft 38a and the bevel gear 39a attached to the shaft 36a, so that the gear 32a is connected to the rack 31a. , and open the hole 30g in the slide plate 30a.

30h slides on the shaft 33, and the filter 20a moves linearly. When the knob 37a is rotated clockwise,
The filter 20a moves in one direction, and when the knob 37a is rotated counterclockwise, the filter 20a moves in the J direction. Similarly, when the knob 37b is rotated clockwise, the filter 20b moves linearly in the J direction, and the knob 37b is rotated clockwise.
When b is rotated counterclockwise, the filter 20b becomes 1
Move in a straight line in the direction.

Furthermore, when the knob 37c is rotated clockwise, the gear 32c attached to the shaft 36c to which the knob 37c is attached engages with the rack 31c provided on the slide plate 30c, so that the rack 31c moves, and the filter 20c moves. Moves linearly in the H direction. Conversely, when the knob 37c is rotated counterclockwise, the filter 20c moves in the G direction. The operational relationship between the knob 37d and the filter 20d is the same as that between the knob 37c and the filter 20c. Note that the two filters moving on the same axis will not move when the slide plates 30 that receive the filters collide with each other (for example, 30e
and 3Of), the filter completely covers the opening F' corresponding to the film image.

The operation of this embodiment having the above-described configuration will be described below. While viewing the original film image enlarged and projected onto the screen 10, turn the four knobs 37a, 37b, 37.
c and 37d, and insert the filter 20 into the image aperture to arbitrarily determine the effective image area. filter 20
The spectral transmittance of the first filter (hereinafter referred to as the first filter) is as shown in FIG. It is possible to distinguish between the two by color-coding. When printing,
The image light passing through the optical path B due to the movement of the scanning mirror 11 , 12 passes through a second filter 18 disposed above the slit 14 so as to completely cover the opening of the slit 14 . The spectral transmittance of is as shown in FIG.
Only the light in the image area that has not passed through the second filter 18
will be passed through.

In this way, only the image area that can pass through the second filter 18 is exposed on the photosensitive drum 13, but there is a method of forming an electrostatic latent image on the photosensitive drum 13 only in the effective image area set by the movement of the first filter 20. , the original film image is different between the negative original image and the positive original image. That is, FIG. 7 is a schematic diagram when a positive copy image is obtained from a negative original image, and the image light that has passed through the first filter 20 is blocked by the second filter 18, so it does not pass through the first filter 20. Only the image area is scanned and exposed onto the photosensitive drum 13, and a copy image in which only the necessary image area is transferred is obtained.

FIG. 8 is a schematic diagram for obtaining a positive copy image from a positive original image. The photosensor SI"Sn of the photoelectric conversion element group 15 arranged near the drum performs the exposure corresponding to the image from the image on the line segment OO to the image on the line segment Q-Q as shown in FIG. The amount of light is sequentially received at points, and based on the detected light reception information, the amount of light at each point is binarized with a code of "1",
Since the effective image area is determined by converting it to "0", the light in the image area that has passed through the first filter 20 is passed through the second filter 18.
Since the light is blocked by the light, the light sensors S1 to Sn do not receive light, and it is determined that the light is "0" in the invalid image area. After that, the scanning mirror 11
．． 12 completes the pre-scan, scans in the W direction, and starts scanning exposure to the photosensitive drum 13. When scanning exposure is started, the blank exposure device 23
LED LI-Ln is turned on to irradiate the invalid image area on the photosensitive drum 13 after scanning exposure, causing corona discharge and preventing the toner 24a of the developing device 24 from adhering to the invalid image area. Note that the exposure amount at each point obtained by scanning the photoelectric conversion element group 15 during pre-scanning is also used as development bias control information such as AE (automatic density adjustment).

Now, the first filter 20 is for color-coding the image to form a boundary between the valid image area and the invalid image area, but even when the invalid image area is set by the first filter 20, the changeover switch is When the entry into the print-only optical path B is switched from the second filter 18 to the third filter 19, the entire area including the area set as an invalid image is copied as a valid image area. The third filter 19 has the same filter characteristics as the first filter 20, and its spectral transmittance is as shown in FIG.

With the changeover switch, the second filter 18, which was in the print-only optical path B as shown in FIG. 7, is moved out of the optical path B in the W direction as shown in FIG. It moves further in the W direction and enters the optical path B.

The second filter and the third filter move in conjunction with each other, and one of them always exists in the optical path B. Third filter 1
9 enters the optical path B, the image light passing through the first filter 20 passes through the third filter 19 by more than 90%;
Image light that does not pass through the first filter 20 is filtered through the third filter 1.
9, the light is transmitted with the same wavelength distribution as the light that passes through the first filter 2o. The first filter 2 of the former
0 and the exposure amount in the image that has passed through the third filter 19, and the exposure amount in the image that has passed only the third filter 19,
Because the former passes through the filter one more time than the latter, the exposure of the former is about 10% smaller than the exposure of the latter, but this is due to the unevenness of exposure due to the determination of the image density transferred to the transfer material. can be ignored.

As described above, since the entire image area of the light passing through the first filter and the light not passing through the first filter passes through the third filter 19, in the case of a positive copy image from a negative original image, the entire image area is scanned and exposed to the photosensitive drum 13. However, in the case of a Voji copy image from a positive original image, the photoelectric conversion element group 15 does not detect an invalid image area, and the blank exposure device 23 does not form a non-image area. It is also possible to adopt a configuration in which the amount of charge is regulated.

A chamber in which the primary charger 22 having the above configuration is partitioned by a partition wall 40a is considered as one unit, and units R0 to Rn are connected in a row for a length corresponding to the width of the photosensitive drum 13, and are formed on the grid side. are arranged facing the surface of the photosensitive drum 13.

The operation of the second embodiment of the present invention having the above-described configuration will be explained below. The method of copying only an arbitrarily designated specific image area using the first filter 20 and the second filter 18 is the same as in the first embodiment of the present invention, and a description of its operation will be omitted.

FIG. 10 is a schematic configuration diagram showing a second embodiment of the present invention, and the second filter can be moved out of the print-only optical path B by a changeover switch. 11 and 12 are diagrams showing a primary charger 22 related to image formation applied to the second embodiment of the present invention, FIG. 11 is a partially cutaway perspective view of the primary charger, and FIG. FIG.

11 and 12, 40 is a case made of an insulating member, and this case 40 has a width β as shown in the figure.
It is partitioned by a partition wall 40a every pitch of 1. A wire holding member 45 made of an insulating material is attached to each partitioned room, and this wire holding member 45 is formed with protrusions 45a and 45b.

44 is a discharge wire, and this discharge wire has a protrusion 45
It is stretched between the protrusions at the V-groove 45c provided in parts a and 45b, and is fixed to the wire holding member 45 with a screw 48 together with a metal terminal 47 in a manner that the wire holding member 45 is wound around the wire holding member 45. .

41 is a connector connected to the metal terminal 17, and 42 is a high voltage line connecting the connector 41 and a high voltage power source (not shown). 46 is a grid for stabilizing the discharge;
A plurality of grids 46 are stretched in parallel over the opening surface of each chamber of the case 4o, and are each connected to the ground. An appropriate voltage can be applied to this grid 46 from a power source (not shown).

First, the first filter 2o is inserted into the opening corresponding to the film image to create an image area that turns blue on the screen 10, and while this blue image area remains on the screen 10, this image area is also If you want to copy the image area as an effective area like the image area that does not pass through the first filter 20, move the second filter 18 in the R direction using the movement changeover switch for the second filter 18 (not shown) and move it out of the printing optical path B. . (Figure 10 dashed line position 1
8′). However, if you start printing in this state,
Since the amount of light in the image area that has passed through the first filter 20 is smaller than the amount of light in the image area that has not passed through the first filter 20, the density of the image transferred to the transfer material cannot be made uniform. Therefore, during pre-scanning, optical sensors S1 to S
n is the exposure amount corresponding to the image on the line segment 0-0 to the image on the line segment Q-Q, and the primary charged voltage on the photosensitive drum 13 at each point is determined based on the light reception information detected by sequentially receiving light at points. is under control.

That is, the optical sensor S is attached to the discharge wire 44 in each unit Rl'''Rn of the primary charger 22 partitioned at predetermined intervals.
By applying a predetermined amount of high voltage corresponding to information on the amount of light received by units 1 to S0 and causing corona discharge from the discharge wire 44 of the unit, the surface potential of the photosensitive drum at the portion receiving the corona discharge is controlled. , the density of the electrostatic latent image formed on the surface of the photosensitive drum by imagewise exposure is made even and uniform.

FIG. 13 is a schematic diagram showing a third embodiment of the present invention, in which a first polarizing filter 30 is disposed in an optical path C common to readers and printing, and a second polarizing filter 31 is disposed in an optical path B exclusively for printing. The second polarizing filter 31 has its polarizing plate oriented at 90° with respect to the first polarizing filter 30.
It is installed in the direction of rotation.

The operation of the third embodiment having the above-described configuration will be explained below. While viewing the original film image enlarged and projected onto the screen 10, the first polarizing filter 30 is moved to arbitrarily determine an effective image area.

The spectral transmittance of the polarizing filter is as shown in FIG. 14, and the light in the image area that has passed through the first polarizing filter 30 is
The light is darker than the light in the image area that does not pass through the polarizing filter, making it possible to distinguish between the two. When printing, scanning mirror 11.
12, the image light passing through the optical path B passes through the second polarizing filter 31, which is rotated by 90 degrees with respect to the first polarizing filter. The light is blocked by the polarizing filter 31 and cannot reach the photosensitive drum 13, resulting in an invalid image area. Only the image light that does not pass through the first polarizing filter 30 is transferred to the second polarizing filter 31.
The light passes through and is exposed to the photosensitive drum 13 as an effective image.

FIG. 15 is a schematic configuration diagram showing a fourth embodiment of the present invention, and FIG. 16 is a diagram showing the spectral transmittance of the filter 20.
The figure shows the spectral sensitivity characteristics of the photosensitive drum 13. The filter device 20 has the same configuration as the first embodiment of the present invention.

The operation of the fourth embodiment of the present invention having the above-described structure will be explained below. First, while viewing the original film image projected onto the screen 10, the filter 20 is advanced into the image aperture to determine the effective image area. Since the spectral transmittance of the filter 20 is as shown in FIG. 16, the image light in the invalid image area becomes blue. When a printing operation is performed in the above-mentioned state, the scanning mirrors 11 and 12 scan in the W direction to scan and expose the photosensitive drum 13 through the slit 14 along the optical path B. However, since the spectral sensitivity of the photosensitive drum 13 is as shown in FIG. 17, no electrostatic latent image is formed on the photosensitive drum 13 in the image area that has passed through the filter 20, and only the image area that has not passed through the filter 20 is exposed to light. The fourth embodiment of the present invention is when an electrostatic latent image is formed on the drum 13 and becomes an effective image, but the fourth embodiment is applied only when a positive copy image is obtained from a negative original image. .

By the way, according to the above embodiment, the negative original image.

This is demonstrated in both positive and original images. In other words, in the case of a positive copy image from a negative original image, with the second filter entering the printing optical path, only the image area that does not pass through the first filter passes through the second filter and is exposed to the photosensitive drum as a valid image. do. On the other hand, in the case of a positive copy image from a positive original image, the photoelectric conversion element group for detecting image information and the exposure element group of the image eraser are arranged one-on-one at a predetermined interval.
Since the photoelectric conversion element group receives light only in the image area that has passed through the second filter, the exposure element group at a position that matches the detected data irradiates the photosensitive drum after scanning exposure. By doing so, an invalid image portion can be formed.

In this way, the image area to be optically erased using the first filter is set, so the setting value on the screen is
There is an effect that a corresponding copy image can be obtained in pairs.

When the third filter enters the printing optical path, all of the image light divided into two regions by the first filter passes through the third filter, which has the same characteristics as the first filter, and The wavelength regions will match. Therefore, in the case of a positive copy image from a negative original image, the entire area that passes through the third filter is exposed on the photosensitive drum as an effective image, and in the case of a positive copy image from a positive original image, the photoelectric conversion element group uses the entire area as an effective image. Since the determination is made, there is no exposure of the exposure element group, and the entire area becomes an effective image.

(Effects of the Invention) As explained above, according to the present invention, a filter that transmits only a specific wavelength range within visible light is disposed on the image recording medium side from the projection lens and in the common optical path during reading and printing. By changing the color of the invalid image area set by the same filter, it is possible to distinguish between valid and invalid areas by color-coding, so it is possible to set a valid image area without blocking the image area to be erased on the screen. effective.

In addition, by switching between a second filter that blocks the transmission wavelength of the filter and a third filter having the same characteristics as the filter to enter the optical path for printing, one of the filters is set to enter the optical path when the second filter enters. A copy image matching the effective image area is obtained, and the third
When entering the filter, there is an effect that the effective image area set by the filter is ignored and a copy image is obtained in which the entire area is valid.

As a result, in the present invention, it is possible to easily set the effective image area, and the cost can be reduced and the size can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a filter of a reader printer according to the present invention, FIGS. 2 and 3 show a first embodiment of a microreader printer to which the present invention is applied, and FIG. 2 is an overall view thereof. Figure 3 is a diagram of the printing operation, Figures 4 and 5 are characteristic diagrams showing the spectral transmittance of the filter used in the first embodiment of the present invention, and Figure 6 is the operation in which the light receiving sensor sequentially reads the original film image. 7, 8 and 9 are schematic diagrams of the operation of the first embodiment of the present invention, FIG. 10 is a schematic diagram of the operation of the second embodiment of the present invention, and FIGS. 11 and 12 are A primary charger applied to an image forming apparatus according to a second embodiment of the present invention is shown.
1 is a partially cutaway perspective view, FIG. 12 is a front view, FIG. 13 is an overall view of a microreader printer showing a third embodiment of the present invention, and FIG. 14 is a third embodiment of the present invention. A characteristic diagram showing the spectral transmittance of the polarizing film used in the examples, Fig. 15 is an overall view of a microreader printer showing the fourth embodiment of the present invention, and Fig. 16 is a diagram showing the spectral transmittance of the polarizing film used in the fourth embodiment of the present invention. FIG. 17 is a characteristic diagram showing the spectral transmittance of the filter, and FIG. 17 is a spectral sensitivity characteristic diagram of the photosensitive drum used in the fourth embodiment of the present invention. Explanation of symbols 1...Halogen lamp 5...Projection lens 10.
...Screen 13...Photosensitive drum (image recording medium) 15...Light receiving sensor 18...Second filter 2
0...1st filter 22...-order charger Fig. 3 Fig. 4 (%) Fig. 5 (%) Fig. 6 P9 1 I 1 Fig. 11 Fig. 72 Fig. 14 Fig. 0%) Wavelength Figure 15

Claims (2)

[Claims] (1) In a reader printer having a reader unit that projects image information of an information recording medium onto a screen and a printer unit that exposes and records the image information onto the image recording medium, the projection lens that projects the image information A reader printer characterized in that a filter that can be moved arbitrarily on the image recording medium side and within a common optical path during reading and printing is provided, and effective image areas and invalid image areas are color-coded on the screen. (2) A second filter that blocks the wavelength light transmitted by the filter and a third filter having the same characteristics as the filter are provided in the print-only optical path, and the second and third filters are switched for the print-dedicated optical path. The reader printer according to claim 1, wherein the reader printer can be put in and taken out by.