JPS62153945A - Reader printer - Google Patents

Abstract

PURPOSE:To obtain a highly definite and economical print in which with simple constitution in which a black frame and retrieval mark are not recorded by placing a masking means that diaphragm a flux of light on the light path in common when it is used as a reader or printer in the downstream from a projecting lens. CONSTITUTION:A reader light path is formed of the first reflecting mirror 11, a movable reflecting mirror for switching light path 12 and a stationary reflecting mirror 13, and a printer light path is formed of the first reflecting mirror 11, the second reflecting mirror 14 and the third reflecting mirror 15. Areas enclosed by chain lines A1.A2 are in the downstream of a projecting lens 6 and a common light path at the time of reader and printer. By placing either of the areas a black frame that appears on the printer can be erased, it is also made possible to confirm the state of masking beforehand on the screen. When the masking means is placed in the area A2, 26a.26b are rotatable around shutter axes 27.28. For instance, when a shutter 26 is rotated to a position shown by broken lines, a flux of light shown by oblique lines is cut.

Description

Detailed Description of the Invention A. Purpose of the Invention [Industrial Application Field] The present invention provides a reader state in which an image recorded on a microfilm is projected onto a screen for observation, and a reader state in which the image is projected onto a screen for viewing. The present invention relates to a reader printer that can be switched to a printer state in which a copy image is obtained by projecting onto a printer.

[Conventional technology]

Generally, most of the images recorded on microfilm are negative images, and a so-called reversal development type electrophotographic copying method is used to obtain a copy of a positive image from this negative image.

On the other hand, with negative image microfilm, generally, as shown in Figure 6, a negative image is recorded within each frame of microfilm F, and the periphery of each frame is transparent, and this peripheral transparent area is Opaque search mark F2 and frame number F
3 are recorded.

Furthermore, in general, in a reader printer using microfilm, an area larger than one frame of the microfilm is projected onto the photoreceptor, so the transparent periphery is also exposed and the charge on the photoreceptor is eliminated.

Therefore, due to reversal development, toner adheres to the surrounding area, and a so-called black frame is recorded around the image on the photoreceptor, and search mark 2 and frame number 3 are recorded within the black frame. There are problems such as poor appearance, lower commercial value of the copy product, and, in the case of electrophotographic copying, an increase in toner consumption.

To solve this problem, a mask with an opening corresponding to the size of the microfilm can be placed on the surface of the microfilm, but with this method, the mask must be changed every time the size or reduction ratio of the image area changes. This is inevitably inconvenient, and since the search mark and frame number are no longer projected on the screen, it is no longer possible to search for information using the mark and frame number.

In addition, prior to printing, the image on the film is scanned with a light sensor to detect the size of the area, and depending on the detected size, the opening and closing timing of the exposure shutter is set for the transfer material feeding direction of the printer. In the width direction of the transfer material, a method has been proposed in which the black frame is removed by setting the position of a width direction regulating light-shielding sheet provided near the exposure slit.

[Problems to be Solved by the Invention] However, this means requires a complicated device, and furthermore, since the area to be printed cannot be visually observed on the screen, it is necessary to check the printed image each time it is printed. There is.

SUMMARY OF THE INVENTION An object of the present invention is to provide a masking means for narrowing a luminous flux, which eliminates the above-mentioned drawbacks.

Summary: Structure of the Invention [Means for Solving Problems] The present invention provides a reader state in which a negative image recorded on a microfilm is projected onto a screen using a projection lens and observed, and a reader state in which the image is viewed. In a reader printer that can be switched to a printer state in which a copy image is obtained by projecting onto an exposure section, a masking means for narrowing a light beam is disposed downstream of a projection lens and on an optical path that is common to both the reader and the printer. It is a reader printer.

[For production]

Since the light beam is narrowed down downstream of the projection lens, the masking width can be finely adjusted. Since masking is performed on the optical path that is common to the reader and printer, it is possible to confirm the removal of the black frame in advance on the screen. - [Example] An example of a reader printer to which the present invention is applied will be explained with reference to the drawings.

In Figure 1, F is a microfilm, 2 is a lamp,
3 is a reflecting plate, 4 is a condenser lens, 5 is a field lens, and 6 is a projection lens.

The entire surface of the microfilm F is illuminated with one frame image by the lamp 2, and the illuminated frame image is projected onto the reader optical path or the printer optical path via the projection lens 6.

The reader optical path is formed by a first reflecting mirror 11, a movable reflecting mirror 12 for switching the optical path, and a fixed reflecting mirror 13, and the printer optical path is formed by the first reflecting mirror 11. It is formed by a second reflecting mirror 14 and a third reflecting mirror 15.

The reflecting mirrors 11, 12, and 13 are inclined at 45 degrees with respect to the optical axis of the projection lens 6, and the reflecting mirrors 11, 13 are fixed at the positions shown. The movable reflecting mirror 12 rotates around the axis 16 between a solid line position and a broken line position, and when placed at the solid line position, forms a reader optical path, and when placed at the broken line position, forms a printer optical path.

The second and third reflecting mirrors 14 and 15 have their reflecting surfaces forming an angle of 45 degrees with each other, and can be reciprocated as a unit in the direction of the arrow between the solid line position and the broken line position.

20 is a screen, 21 is a photosensitive drum arranged in an exposure section, and 22 is a slit plate.

At the time of reading, the movable reflecting mirror 12 is stationary at the solid line position, the second and third reflecting mirrors 14 and 15 are stationary at the solid line position located behind the movable reflecting mirror 12, and the image light of the microfilm is transmitted to the projection lens 6. The light passes through the first reflecting mirror 11, moves through the movable reflecting mirror 12, and is projected onto the screen 20 via the fixed reflecting mirror 13.

On the other hand, during printing, the movable reflecting mirror 12 is rotated counterclockwise and placed outside the optical path indicated by the broken line position, and the movable reflecting mirror 12 is
Reflector 14 The third reflector 15 moves in the direction of the arrow to the position indicated by the broken line, and when placed at the exposure start position indicated by the broken line, the image reflected by the first reflector 11 moves in the opposite direction from that position. The reflected light passes through a slit plate 22 and is scanned onto a photosensitive drum 21 rotating counterclockwise. When the second and third reflecting mirrors 14-15 are located close to the solid line position, the scanning exposure of the image is completed, and then the movable reflecting mirror 12 returns to the solid line position and switches to the reader mode.

The second and third reflecting mirrors 14 and 15 move in the direction of the arrow at a speed of 17H, which is the circumferential speed of the photosensitive drum 21, to perform exposure scanning. When the copying magnification is changed by exchanging the projection lens, etc., the moving speed may be constant regardless of the magnification.

Around the photosensitive drum 21, 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 by electrophotography.

Note that a one-dimensional image sensor (such as a COD) may be disposed in the exposure section, and the output of the image sensor may be sent to a laser beam printer to obtain a copy image.

Here, the area Al-A2 surrounded by a chain line in FIG. 1 is downstream of the projection lens 6 and is a common optical path for the reader and printer, and if the masking means of the present invention is disposed in any of this area, , it is possible to erase the black frame that appears on the printer L, and it is also possible to check the masking state on the screen in advance.

FIG. 2 shows an example of the masking means of the present invention, in which it is placed in the area A2. Shutters 26a and 26b are rotatable about shafts 27a and 27b. By rotating this shutter 26, masking of the light flux is performed. For example, when the shutter 26 rotates to the position shown by the dashed line, the light flux shown by the diagonal line is cut off.

Figures 3 and 4 are detailed views thereof. The shutter 26a and the gear 33 are connected to the shaft 27, and the shutter 26b and the gear 30 are connected to the shaft 2.
The frames 29a and 8 can be rotated together with each other.
29b.

A knob 34 is fixed to the end of the shaft 28 that projects outward from the frame 29b, and a friction plate 37, a friction leaf spring 38, and a retainer 39 are incorporated in the other end of the shaft 28. 41 is a main body frame. Gears 31 and 3 that interlock the gears 30 and 33 as shown in the fourth diagram.
2 is attached to the frame 29b with a shaft 40, and its gear 30
and 33 have the same number of teeth.

When the knob 34 is turned to the left in FIG. 3, the shaft 28 and shutter 26b move in the direction shown by the dotted line,
6a rotates the optical axis symmetrically by the same angle in the opposite direction to the dotted line a.

Even if the rotation of the knob 34 is stopped at a desired position of the shutter and the finger is released, the shutter stops at that position without rotating due to its own weight due to the action of the friction plate 37 and the friction spring 38.

FIG. 5 is an external view of a reader printer to which the present invention is applied. If the operator now turns the knob 34, the screen 20
The mastermind K appears above. This mastermind is the shutter 26a-2
Since the area is formed by 6b and has no luminous flux, the light does not reach the photoreceptor either, and the area becomes a non-print area. Therefore, by covering the area K on the screen that you do not want to print with a black screen and leaving only the part you want to print, you can print only the part you want to print.

The embodiment of the present invention described above was an example of masking only in the vertical direction of the screen, but for example, if the masking device of the embodiment is attached in a direction rotated 90 degrees around the optical axis, masking can be performed. Masking can also be performed from the left and right directions, and by arranging both in parallel in the optical axis direction, masking can be performed from the left and right and up and down directions. Also, up and down, left and right 4
Each masking may be performed independently.

Further, in this embodiment, a rotating plate member is used for the shutter, but the present invention is not limited to this, and it is also possible to apply a curtain, a belt, a liquid crystal, etc., which are known from still cameras and the like. Furthermore, the knob 34 may be replaced with an electric one for rotating the shutter.

FIG. 7 shows another embodiment of a reader printer to which the present invention is applied, in which the reader/printer is converted by moving the reflecting mirrors 50 and 51 in the RψW direction. Other configurations may also be applied as long as they have a common optical path between the reader and the printer.

C. Effects of the invention - L As explained above, a device with a simple structure that can produce high-quality and economical prints without recording black borders or search marks has been realized, and it can easily handle large and small film images. can be taken. Furthermore, by arranging the masking means on the downstream side of the projection lens, the masking width can be finely adjusted even when the magnification is high, and it is also possible to check the masking width on the screen in advance.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the scope of application of the present invention to a reader printer, FIG. 2 is a side view of an embodiment of the masking means according to the present invention, FIG. 3 is a perspective view illustrating the driving means thereof, and FIG.
The figure is a front view, FIG. 5 is an explanatory diagram of the printing area specification method according to the present invention, FIG. 6 is a front view of the microfilm, and FIG. 7 is an optical path diagram of another configuration example of a reader printer to which the present invention is applied. . F... Microfilm, 6... Projection lens, 20
. . . Screen, 21 . Figure 5 Figure 6 Figure 2 F3 "'"-"

Claims (1)

[Claims] (1) Negative images recorded on microfilm,
In a reader printer that can be switched between a reader state in which the image is projected onto a screen for observation using a projection lens, and a printer state in which the image is projected onto an exposure unit to obtain a copy image, the printer is located downstream of the projection lens and at the time of the reader. A reader printer characterized in that a masking means for narrowing down a luminous flux is arranged on a common optical path.