JPH0458612B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a microfilm reader printer, and particularly to a reader printer that is equipped with a projection image rotation prism and can change the direction of projection of an image on a microfilm medium onto a screen or copy exposure surface. Regarding.

Prior art This type of reader printer
It is known from Japanese Patent No. 21298, for example, by appropriately rotating and projecting the original image, which is taken from various roll microfilms, microfissures, etc. in an irregularly vertically or horizontally long manner, the projected upward direction is unified. However, since the projection images of various magnifications are copied using copy paper of the same size, the number of types of copy paper (different sizes and loading orientations) required is reduced.

However, in order to design a projection image rotation prism used in combination with a projection lens so that it satisfies all the angles of view of the corresponding projection lens and that the optical axis does not deviate between the entrance side and the exit side, it is necessary to The size is too large to be usable. If this is made small enough to withstand use, the optical axis will shift, and the projected image will not be rotated around the image center.As the rotation center deviates from the image center, the rotated projected image will also appear on the exposure surface, etc. The position may be misaligned, and a complicated realignment work is required.

Objective: The present invention provides a compact, inexpensive, and convenient reader printer that automatically corrects the positional deviation during rotation of a projected image, uses a small prism, and can omit complicated realignment work. The purpose is to provide

Accordingly, the present invention includes a projection optical system that includes a projection lens and a mirror system and projects an image of a microfilm onto a screen and a copy exposure surface, and a projection optical system that is provided near the projection lens and that is parallel to the optical axis of the projection lens. The prism rotates the projected image by rotation of its surroundings, and the prism rotates the projected image prior to the start of image exposure for copying.
A position correcting means is provided for correcting the position of at least one of the projected image and the copy paper so that the relative positional relationship between the projected image and the copy paper is constant.

The projection optical system projects the original image at an angle of view according to a set projection magnification. The projected image is rotated by a prism located near the projection lens whose projection optical path has a small spread. If this prism is made small enough to withstand use, the optical axes of incidence and exit will be shifted, including the above-mentioned positional advantage, and at the same time as the projected image is rotated, the center of the image will be on the exposure surface. etc., the position shifts. This amount of shift increases or decreases depending on the projection magnification. However, when rotating and returning the projected image by the prism, the control means operates the position correction means with a correction value corresponding to the set projection magnification based on the detection signal from the magnification detection means, so that the image cannot be taken. At least one of the image and the copy paper is automatically corrected in position so that the relative positional relationship between the projected image and the copy paper is constant.

This positional correction is performed by correcting the relative positional relationship between the projected image and the copy paper in the X and Y2 directions, which are perpendicular to each other, since the projected image is rotated by 90 degrees. Specifically, it is sufficient to move the projected image in the X and Y2 directions, and then move the projection lens. Move the prism. Move the projection lens and prism. There is a method that involves rocking the mirror. Alternatively, the copy paper side may be moved. In this case, the photosensitive paper or transfer paper is moved, for example, in the X direction, which corresponds to the direction in which it is transported. The Y direction is also possible, but the configuration becomes complicated.

In the case of , , , the prism is basically used in common for various set magnifications, but in order to avoid increasing the size of the prism, it is not possible to handle changes in the projection magnification over a very large range.

In the case of 〓, a prism designed to be as small as possible is prepared for each projection magnification, and this is integrated with a projection lens of various magnifications and moved. It's advantageous.

〓, the mirrors in the projection optical path are
It can be tilted in either direction, but the type of magnification that can be used is limited depending on whether the prism is shared for various magnifications or whether a prism is provided for each magnification. It depends on whether it has certain characteristics or not.

〓, in the position of the displaced projected image,
This aligns the photosensitive paper or transfer paper, and corrects the feeding timing of the photosensitive paper or transfer paper according to the positional deviation of the projected image in the X direction. The simplest method is to correct the stop position of the photosensitive paper or transfer paper when exposing the entire surface of the photoconductor or photosensitive paper.This method involves setting an exposure stop position switch that stops the photosensitive paper or transfer paper at the exposure position. This is done by moving in the X direction by an amount equivalent to the correction amount.

Example A first example shown in FIGS. 1 to 5 will be described. The entire device is shown in Figure 1, with a screen 2 at the top of the front of the main body 1, an operation panel 3 along the bottom of the screen 2, 4 projection lenses below the operation panel 3, and 4 projection lenses below the 4 projection lenses. A film carrier section 5 is provided respectively.
A paper feeding section 6 is provided on the right side of the main body 1, and a developing/fixing section 7 is provided on the left side. The image of the microfilm loaded in the film carrier section 5 is illuminated from below, and is projected onto the screen 2 and the paper feed section 6 via a mirror (not shown) inside the main body 1 by the projection lens 4.
and an exposure section (not shown) located between the developing/fixing section 7 and projected thereon.

As shown in FIGS. 2 and 4, the projection lens 4 is combined with a specific projection image rotating prism 8 corresponding to its magnification. In order to miniaturize the prism 8, the optical axes of incidence and exit are shifted by an amount a corresponding to the projection magnification as shown in FIG. 4, and this causes image position shift when the projected image is rotated. Therefore, by moving the projection lens 4 and the prism 8 integrally in both the X and Y directions, the positional deviation caused by the rotation of the projected image is corrected. For this purpose, a Y is installed on the frame 9 located at the projection lens 4 installation part of the main body 1 using a pin 10 and a long hole 11.
Y-direction moving member 12 that can move only in the direction
However, there is also a pin 13 on this Y direction moving member 12.
An X-direction moving member 15, which is movable only in the X-direction by a long hole 14 and a long hole 14, is provided as shown in FIG. 4 is mounted with its outer cylinder 17 prevented from rotating by a groove 18, and a prism 8 is mounted on the projection lens 4 so as to be independently rotatable by its holder 19.

The Y-direction moving member 12 is moved back and forth in the Y-direction by a Y-direction drive motor 23 directly connected to the gear 22 through a rack 21 screwed to one side edge thereof and a pinion gear 22 that meshes with the rack 21. The projection lens 4 and prism 8 are moved in the Y direction via the X direction moving member 15 and the lens holder 16. The motor 23 is held on the main body 1 side.

The X-direction moving member 15 is connected to an
The projection lens 4 and prism 8 are moved forward and backward in the X direction by the direction drive motor 27, and the projection lens 4 and prism 8 are moved in the X direction via the lens holder 16. motor 27
is held on the Y-direction moving member 12.

The projection lens 4 has a focus gear 28 for manual operation at its upper end, and a locking pin 29 that fits into the groove 18 of the lens holder 16 in a part of the outer cylinder 17. A magnification detection magnet 30 whose height position is determined is provided (FIG. 3). A required number of magnification detection reed switches 31 are provided on the front surface of the X-direction moving member 15, each facing the magnet 30 provided at a different height for each projection lens 4 mounted on the lens holder 16. There is. 32 is a board of the reed switch.

The prism 8 is provided with an image rotation gear 33 at the lower end of its holder 19, and is meshed with a gear 35 directly connected to a prism drive motor 34 inside the main body 1.

On the other hand, when rotating and returning the projected image, the X and Y direction movable member 1
The microcomputer 3 is used as a means for moving the images 5 and 12 and automatically correcting the positional deviation of the projected image.
6 (Figure 5) is used. The microcomputer 36 has a nonvolatile memory 3 that stores correction values in the X and Y directions according to the magnification of each projection lens 4.
7, so that a correction value corresponding to the detected magnet 30 of each reed switch 31 is extracted. Microcomputer 3
6 receives an image rotation signal IR, a print signal p, a print end signal PE, etc., and operates each drive motor 23,
The driving output is given to drivers 38, 39, and 40 of 27 and 34, and printer sections such as a paper feeding section 6 and a developing and fixing section 7.

Now, if the image of the microfilm set in the film carrier section 5 of FIG. 1 is horizontally long and it is projected, the projected image 41 will be located horizontally in the center on the screen 2 as shown in FIG. , assuming that the orientation matches the copy paper 42,
Just print it as is.

Due to the projection direction, if the microfilm image is vertically long, the photographed image 41 will be vertically located at the center of the screen 2, as shown in FIG. 7, and will be perpendicular to the copy paper 42. in this case,
There is no problem in visually recognizing the projected image 41 on the screen 2, but since the projected image 41 protrudes from the copy paper 42, the image will be missing if printed. At this time, the projection image rotation signal IR is inputted to the microcomputer 36 by manual operation on the film side. As a result, the microcomputer 36 operates the prism drive motor 34 when receiving the print signal P, and also pulls out the X and Y direction position correction values from the memory 37 in accordance with the magnification detection signal from the reed switch 31. Based on this, the X and Y direction drive motors 23 and 27 are operated.

As the prism 8 rotates, the projected image 41 changes direction on the screen 2 and the copy paper 42 as shown in FIG. As shown in the figure, the position is shifted with respect to the copy paper 42 and the like. However, by the operation of the motors 23 and 27, the projection lens 4 and the prism 8 are moved in the X and Y directions by the predetermined correction value, and the projected image 41 is moved to the correction position shown in FIG.

After the position correction operation is completed, the microcomputer 3
6 causes the printer section to perform a printing operation based on the print signal P.

The position correction state is canceled when the microcomputer 36 receives the print end signal PE, and the projection lens 4 and prism 8 are returned to their initial states by operating the motors 23, 27, and 34 in the opposite direction. , becomes the leader state.

Note that as a method of feeding back the correction value to the microcomputer 36, the memory 3
7, it is also possible to use a timer or the like.

The second embodiment shown in FIGS. 9 and 10 is
The position of the projected image is corrected in the X direction in the same manner as in the first embodiment, and in the Y direction, the first and second mirrors 51 and 52 used for printing on the projection optical path are This is done by swinging it around. For the correction in the Y direction by the mirrors 51 and 52, a connecting rod 57 connects the driven pins 55 and 56 provided at the free ends of the mirrors 51 and 52, and a rack is formed on one edge of the connecting rod 57. 58, a gear 22 directly connected to the Y-direction drive motor 23 in the first embodiment is engaged.

In this embodiment, as in the first embodiment, X, Y
The positional deviation of the projected image is corrected by controlling the drive motors 27 and 23 in each direction.

In FIG. 9, even if the exposure stop position switch 62 for the photosensitive paper 61 that is conveyed and fed in the X direction is adjusted to adjust the exposure stop position of the photosensitive paper 61, the projected image and the photosensitive paper 61 are different. The relative positional relationship in the X direction can be corrected. This method involves direct exposure to photosensitive paper used as copy paper, but in the case of a printing method in which the image once exposed on the photoreceptor is transferred to transfer paper used as copy paper, the projected image on the photoreceptor is The timing at which the registration roller is turned on to align the leading edge with the leading edge of the transfer paper may be changed in accordance with the correction value.

Effects According to the present invention, when the projected image rotates and returns due to the rotation of the prism, the deviation in the relative positional relationship between the projected image and the copy paper, which varies depending on the projection magnification due to the rotation of the projected image, is automatically corrected. Therefore, the small prism that causes the positional deviation of the projected image as described above can be employed without the need for complicated realignment work between the projected image and the copy paper, and the prism becomes small, inexpensive, and convenient to use.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of the first embodiment, FIG. 2 is an exploded perspective view of the main parts, and FIG. 3 is a perspective view of the projection lens.
Figure 4 is a combination diagram of the projection lens and prism.
Figure 5 is a block wiring diagram around the control means, Figures 6 to 8 are diagrams of the positional relationship between the projected image, the screen and the exposure surface, Figure 9 is a perspective view of the main parts of the second embodiment, and Figure 10. FIG. 2 is a partial perspective view showing a mirror swinging mechanism. DESCRIPTION OF SYMBOLS 1... Main body, 2... Screen, {4... Projection lens, 16... Lens holder} Magnification changing means, 5... Film carrier section, 6... Paper feeding section,
7... Development and fixing section, 8... Prism, {12...
Y-direction moving member, 15...X-direction moving member, 23
... Y direction drive motor, 27 ... X direction drive motor, 62 ... Exposure stop position switch, } position correction means, {30 ... magnet, 31 ... reed switch, } projection magnification detection means, 36 ... micro Computer (control means), 37...Memory, 4
1... Projection image, 42... Copy paper, 61... Photosensitive paper (copy paper).

Claims (1)

[Scope of Claims] 1. A projection optical system that includes a projection lens and a mirror system and projects an image of a microfilm onto a screen and a copy exposure surface; and an axis that is provided near the projection lens and is parallel to the optical axis of the projection lens. The prism rotates the projected image by the rotation of its surroundings, and the prism rotates the projected image prior to the start of image exposure for copying so that the relative positional relationship between the projected image and the copy paper remains constant. A reader printer comprising: position correction means for correcting the position of at least one of a projected image and a copy sheet; 2. The position correction means reads a position correction value corresponding to a projection magnification by the projection optical system from a storage unit, and performs position correction according to the read position correction value. Reader printers listed in section.