JPH0618994A - Reader printer - Google Patents

Abstract

PURPOSE:To obtain a highly accurate image by a uniform exposure in the printing of a reader printer, simultaneously, to prolong the life of a lamp and to reduce operating cost. CONSTITUTION:An illuminating lamp is composed of the lamp 2 of high-working accuracy and -cost, and the lamp 1 of low-working accuracy and-cost, and two sets of the illuminating lamps are changed over to use, that is, the inexpensive lamp 1 is used at the time of reading a screen, and the expensive and high-accurate lamp 2 is used only at the time of printing. The rear operating time of the expensive lamp 2 capable of having highly accurate printing with uniform illumination, can be shortened, so that the highly accurate printing can be attained, and the operating cost can be reduced, as well.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reader printer for projecting an image of a film illuminated by an illumination unit onto a screen or a photosensitive surface.

[0002]

2. Description of the Related Art In a conventional microfilm reader printer, as shown in FIG.
To illuminate. The image light transmitted through the microfilm F is enlarged and projected on the screen 303 via the reader optical system 302 at the time of the reader. On the other hand, at the time of printing an image, the image is projected onto the photoconductor drum 305 provided in the recording unit via the recording optical system 304 and electrostatically recorded on the photoconductor drum. In each case, the microfilm F was illuminated with the same illumination light. When the image is projected on the screen when the reader is used, the difference in the brightness of the image due to the difference in the amount of illumination light between the center and the periphery of the screen is hardly felt, but the printed image shows a difference in the amount of light between the center and the periphery. Accordingly, an image is bright in the center and dark in the periphery. Therefore, the center of the filament of the illumination lamp 300 and the optical axis, that is, the center of the print are made to coincide with each other so that the unevenness of the light amount in the print range is minimized.

For this purpose, as shown in FIG. 12, when the illumination lamp 300 is mounted on a lamp holder (not shown), the distance from the end of the leg 51 of the illumination lamp to the center of the filament 50 of the illumination lamp becomes a reference. If the dimension 1 and the dimension m from the leg 51 to the center of the filament 50 are not made accurately, the filament center and the optical axis will be displaced when the illumination lamp is attached to the lamp holder, and printing will be performed as shown in FIG. Since the unevenness of the light quantity at the end of the area becomes larger than that when the optical axis is aligned with the center of the filament as shown in FIG. 15 (end light quantity b> d), the above dimensions l and m are generated. The lamp is made to be accurate.

13 and 14 are views of the lamp of FIG. 12 seen from the directions of arrows J and K, respectively. FIG. 13 shows a state in which the filament 50 is tilted in the front-back direction, and FIG. 14 shows the filament 50 twisted. In such a case, the unevenness of the light amount increases as described above. Therefore, the illumination lamp is manufactured so that the inclination and the twist of the filament are eliminated as much as possible.

[0005]

The higher the accuracy of the illumination lamp, the more difficult the lamp manufacturing process becomes and the more expensive it becomes. However, in the above-mentioned conventional example, not only at the time of printing but also at the time of reader, it is expensive and highly accurate. However, since expensive lighting lamps are used, the life of expensive lamps is shortened and maintenance costs are high.

[0006]

According to the present invention, at least two kinds of illumination sources are arranged in the illumination unit, and the film is illuminated by the selected illumination source, thereby extending the life of each illumination source of the illumination unit. In addition, it is possible to reduce the number of replacements of the illumination source, which simplifies the maintenance and management, is economical, and can obtain a high-quality printed image for a long period of time.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments. FIG. 1 shows a schematic configuration of a reader printer to which an illumination device according to a first embodiment of the present invention is applied. That is, F is a microfilm as a translucent original, and an illuminating device S for illuminating the microfilm F, a reader optical system R for projecting on the reading screen 10, and a photosensitive drum 15 as a recording section. And a recording optical system P for projecting light onto the image.

The reader optical system R is composed of a projection lens 5 and mirrors 6, 7, 8 and 9, and projects a film image on the screen 10. On the other hand, the recording optical system P is composed of the lens 5, the mirrors 6 and 7, and the scan mirrors 11 and 12 which advance and retreat in the direction of the arrow in the optical path between the mirrors 7 and 8 of the reader optical system R, Image light is guided onto the photosensitive drum 15 through the slit 13.

As shown in FIG. 1, the illuminating device S includes an illuminating lamp 1, an illuminating lamp 2, a illuminating lamp 1 or a spherical reflecting mirror 22 arranged on the back side of the illuminating lamp 2, an illuminating lamp 1 or an illuminating lamp. It is composed of a reflection mirror 3 for reflecting the illumination light from the lamp 2 to the microfilm F side and a condenser lens 4 for condensing the illumination light.

2 and 3 are views showing an illuminating device S. The illuminating lamp 1 is a dedicated illuminating lamp for a reader, which is a commercially available inexpensive lamp that does not require precision, and the illuminating lamp 2 is an illuminating lamp for printing. 1 having dimensions l and m shown in FIG.
2 and FIG. 13, the tilt and twist of the filament are more expensive than the illumination lamp 1 and are expensive lamps.

The illumination lamp 1 and the illumination lamp 2 are fixed to a common lamp base 38, and this lamp base 38 can be moved with respect to the illumination housing 34 by moving a lever 33. FIG. 2 shows a state at the time of the reader, and the reader illumination lamp 1 is arranged on the optical path. At this time, the illumination lamp position detecting micro switch 40 is attached to the lamp base 38.
It is pressed by the switch to turn on, it is detected that the illumination lamp 1 is arranged in the optical path, the illumination lamp 1 is turned on, and the image of the microfilm is projected on the screen. At the time of printing, the lever 33 is moved in the direction of the arrow to turn off the micro switch 40 and the illumination lamp 1
Turns off and the state shown in FIG. 3 is reached, and the printing illumination lamp 2 is arranged on the optical path. At this time, the micro switch 41 for detecting the position of the illumination lamp is pushed by the lamp base 38 to be turned on, it is detected that the illumination lamp 2 is arranged on the optical path, and the illumination lamp 2 is turned on. When the print key is pressed in this state to start the printing operation, the image on the microfilm is transferred to the photosensitive drum 15 via the recording optical system.
Projected on. When returning to the leader state, the lever 33 is moved to the state shown in FIG.

In the above embodiment, when the reader illumination lamp 1 is arranged on the optical path, even if the print key is pressed, the key is not accepted so that the printing operation is not performed. When the printing illumination lamp 2 is arranged on the optical path, the user can illuminate by not turning on the illumination lamp 2 by turning off the illumination lamp 2 if the print key is not pressed for a certain period of time. It prevents you from forgetting to switch the lamp and using it.

As described above, by switching between the illumination lamps, the expensive and highly accurate illumination lamps are used for a shorter time than when one illumination lamp is used for the reader and the printing.

Usually, the life of the reader printer is several years, the number of printed sheets is tens of thousands, and the life of the illumination lamp is hundreds of hours. As an example, a reader / printer having a main body having a life of 5 years or 50,000 prints and an illumination lamp having a life of 200 hours will be described.

Assuming that the time used as a reader is 4 hours a day and 240 days in one year, the usage time in five years is 4 hours / day × 240 days / year × 5 years = 4800 hours. In addition, the time required to take one print is 1
When it is 0 second, the time required to print 50,000 sheets is 10 seconds / sheet × 50,000 sheets = 500,000 seconds≈140 hours. Therefore, when one illumination lamp is used for both reading and printing as in the conventional case, the lifetime of the illumination lamp is 200 hours. Therefore, (4800 + 140) hours / 200 hours = 24.7, that is, the life of the main body is 25 hours. Use expensive lighting lamps. When the illumination lamps are switched and used as in the present invention, 4800 hours / 200 hours = 24 ... Leader time 140 hours / 200 hours = 0.7 ... Printing time That is, 24 inexpensive lamps for readers are used for printing. Since one expensive lamp is used, the cost of the illumination lamp is significantly reduced when the illumination lamp is switched and used as in the present invention.

FIG. 4 and FIG. 5 show a second embodiment of the present invention, in which the switching of the illumination lamp is automatically performed in conjunction with the print switch.

The reader lamp 31 and the printing lamp 3
2 are both fixed to the lamp stand 38, and the lamp stand 38
Is pin-connected to the circumference of a disk 36 via a lever 33 and a connecting lever 35, and the disk 36 can be rotated by a motor 37. The rotation of the motor 37 rotates the disk 36 and moves the lamp base 38 via the connecting lever 35 and the lever 33, and the lamp 31 and the lamp 32 reciprocate in the arrow direction with respect to the illumination housing 34. The lamp 31 is similar to the lamp 1, and the lamp 32 is similar to the lamp 2.

FIG. 6 is an overall perspective view of the second embodiment. The lamp 31 and the lamp 32 can move in a direction perpendicular to the optical path connecting the stationary spherical reflecting mirror 22 and the mirror 3.

FIG. 7 is a block diagram showing the control of the reader / printer in the second embodiment. Input signal (2
01), the lamp position detection signal (205) to the CPU (2
02), and the motor drive circuit (206) rotates the motor (207) to place the lamp in a predetermined position,
The printer driving circuit (203) allows the printer (20
4) is driven to print.

FIG. 8 is a flow chart of this second embodiment. When the power of the reader / printer is turned on (101), the lamp position detection sensor operates to detect the position of the lamp (102). At this time, if the lamp is not in the leader position, that is, if the lamp 31 is not arranged on the optical path, the motor drive circuit operates and the motor 37 rotates, causing the disk 36,
The lamp base 38 moves via the connecting lever 35 and the lever 33 (103), the lamp 31 is arranged on the optical path as shown in FIG. 5, the motor is stopped, and the reader lamp 31 is turned on (104).

At the time of printing, the reader lamp 31 is turned off (106) according to the input signal of the print switch (106), the motor 37 is rotated, and the lamp base 38 is passed through the disk 36, the connecting lever 35, and the lever 33. Moves (107), and as shown in FIG. 4, the lamp 32 for printing is moved.
Is placed on the optical path (108), the motor is stopped, and the printing lamp 32 is turned on (109). After that, FIG.
As shown in FIG. 5, the scan mirrors 11 and 12 move in the direction of arrow A to perform a scanning operation, and the image on the microfilm F is projected on the photosensitive drum 15 and printed by a series of copying processes (110).

When the printing operation is completed, the printing lamp 32 is turned off (112), the motor 37 is rotated again, the lamp base 38 moves in the direction opposite to the moving direction, and as shown in FIG. Are placed on the optical path. The scan mirrors 11 and 12 move in the direction of arrow B and enter the reader state. In the above embodiment, only the illumination lamp 31 dedicated to the reader is turned on at the time of the reader, and only the illumination lamp 32 dedicated to the time of printing is turned on at the time of printing. Therefore, one illumination lamp is always used both at the time of the leader and at the time of printing. In the case where the illumination lamp is switched and used, the time until the illumination lamp for printing is replaced becomes longer than the time until the illumination lamp is replaced.

In the above-described embodiment, the illumination lamp is moved and switched, but it is also possible to fix the illumination lamp and move the other illumination system to switch the illumination lamp.

FIG. 9 is an overall perspective view showing the third embodiment.
The illumination lamps 1 and 2 are fixed vertically separated from each other, and the illumination lamps are switched by turning the knob 39 to change the angle of the mirror 3. FIG. 10 is a cross-sectional view showing the state of the reader, in which 1 is an illumination lamp for the reader, and the mirror 3 has an angle set so that the reflected light of the illumination lamp 1 is directed to the centers of the condenser lens 4 and the projection lens 5. In the reader state, only the illumination lamp 1 is turned on and the illumination lamp 2 is turned off. When taking a print, turn the knob to set the angle of the mirror 3
Then, the printing illumination lamp 2 is turned on and the illumination lamp 1 is turned off. If you print in this state, you can print with a highly accurate lighting lamp.

[0025]

As described above, a low-intensity but low-intensity illumination lamp for readers and an expensive illumination lamp for printing with high accuracy and high quality are provided, which can be switched depending on each case. By using it, there is an effect that the cost is low when the illumination lamp is replaced over its life, compared with the case where one highly accurate and expensive illumination lamp is used both at the time of reading and at the time of printing.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a reader printer to which a first embodiment of the invention is applied.

FIG. 2 is a diagram illustrating a lighting device in a reader state according to the first embodiment.

FIG. 3 is a diagram showing an illumination device in a printed state according to the first embodiment.

FIG. 4 is a diagram showing an illumination device in a printed state according to a second embodiment.

FIG. 5 is a diagram showing a lighting device in a reader state according to a second embodiment.

FIG. 6 is a schematic perspective view of a reader printer to which the second embodiment is applied.

FIG. 7 is a block diagram of a control circuit according to a second embodiment.

FIG. 8 is a flowchart of the operation of the second embodiment.

FIG. 9 is a schematic perspective view of a reader printer according to a third embodiment.

FIG. 10 is a diagram illustrating a leader state according to the third embodiment.

FIG. 11 is a diagram illustrating a printing state of the third embodiment.

FIG. 12 is a diagram illustrating the accuracy of an illumination lamp.

FIG. 13 is a diagram illustrating a defective illumination lamp.

FIG. 14 is a diagram illustrating a defective illumination lamp.

FIG. 15 is a diagram illustrating a light amount distribution on a print surface.

FIG. 16 is a diagram illustrating a light amount distribution on a print surface.

FIG. 17 is a schematic configuration diagram of a conventional reader printer.

[Explanation of symbols]

 1 Illumination Lamp 2 Illumination Lamp 3 Mirror 4 Condensing Lens 5 Projection Lens 10 Screen 15 Photosensitive Drum

Claims (3)

[Claims] 1. In a reader printer for projecting an image of a film illuminated by an illumination unit onto a screen or a photosensitive surface, at least two types of illumination sources are arranged in the illumination unit,
A reader printer characterized in that a film is illuminated by a selected illumination source. 2. The reader printer according to claim 1, further comprising a reader illumination source and a printer illumination source. 3. The reader printer according to claim 2, wherein the illumination source selected by the recording start signal is activated.