JPH01172941A - Lighting equipment for reader/printer - Google Patents

Abstract

PURPOSE:To obtain an easily readable image scarcely having an uneven light quantity at the time of looking at an image of a film on a screen, and to obtain a correct light quantity at the time of taking a print by providing a means for diffusing a light beam from an illuminating lamp at the time of reader and removing the diffusing means at the time of printing. CONSTITUTION:At the time of reader, an uneven light quantity of the center and the periphery is reduced by setting a diffusion surface 21a of an illuminating lamp 21 to the front side, namely, the film F side and diffusing a light beam for going to a screen. Also, at the time of taking a print, the light quantity required for a copying process is obtained by turning an operating control 41, turning a transmission surface 21b of the illuminating lamp 21 to the film F side and increasing the light quantity for going to a photosensitive drum. In such a way, a lighting equipment by which an uneven light quantity is scarcely generated in the center and the periphery at the time of looking at an image on a screen is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an illumination device for illuminating an image on a microfilm in a reader printer.

<Prior art> As shown in FIG. 10, the optical path configuration of a conventional reader printer is such that the image on the film F is illuminated by an illumination means consisting of an illumination lamp 1, a spherical reflection mirror, a mirror 2, a mirror 3, and a condenser lens 4. ing.

In the printing state, the projection lens 5, mirror 6.
7, scanning mirrors 11 and 12, and the slit 13a of the slit plate 13, and are projected onto the exposure portion of the photosensitive drum 14. In addition, when in the reader state, the scanning mirror 11.12 is moved in the direction of the arrow to a position where it does not block the optical path to the screen 10, and the scanning mirror 11.
The image of film F is enlarged and projected onto it.

<Problems to be Solved by the Invention> By the way, in the conventional example described above, there is a difference in the light M from the illumination lamp 1 between the center and the periphery on the screen 10 or the photosensitive drum 14, and the periphery is different from the center of the image. The image was dark and difficult to read.

Therefore, in order to reduce the unevenness between the lights when printing, the voltage applied to the illumination lamp 1 should be set higher at the periphery than at the center to prevent unevenness in the scanning direction (arrows A and B in Figure 10). By doing so, the peripheral light φ is increased and the unevenness in the amount of light is reduced. In addition, to deal with the unevenness in the direction perpendicular to the scanning direction, as shown in No. 10, by making the width of the slit 13a wider at the periphery than at the center, the amount of light at the periphery can be increased and the unevenness of light amount can be reduced. measures were taken.

On the other hand, in order to reduce the unevenness in the amount of light when viewing a projected image on the screen 10, there is a method of changing the degree of diffusion between the center and the periphery on the diffusion surface of the screen. However, there are disadvantages in that a sufficient effect cannot be obtained and the cost for performing diffusion treatment on the screen is also high.

Furthermore, attempts have been made to use the glass surface of the illumination lamp 1 as a diffusing surface to diffuse the illumination light.This method reduces unevenness in the amount of light and at the same time reduces the amount of light. However, when the amount of light incident on the photosensitive drum 14 decreases when using a printer, the photosensitive drum has little margin for the amount of light, resulting in insufficient light amount and a defective image being printed. Therefore, it is necessary to increase the voltage applied to the lighting lamp 1 to increase the amount of light from the lamp, but increasing the voltage applied to the lamp causes problems such as increased heat generation and shortened life of the lamp. Therefore, the voltage applied to the lamp could not rise above a certain level.

The object of the present invention 11 is to eliminate the drawbacks of the conventional example described above and to provide an illumination device with less unevenness in the amount of light between the center and the periphery when viewing an image on a screen.

Means for Solving the Problems> The configuration of the present invention for achieving the above-mentioned object will be explained using FIG. 1 corresponding to one embodiment.

The present invention provides an illumination device for illuminating the image of a reader/printer of a microfilm F, with a means (in the illustrated example, a diffusion surface portion of a lamp glass) 21a for diffusing light from an illumination lamp 21 during reading, When used as a printer, it has operation means 41 other than the diffusion means 21a.

Effect> When reading, the diffusion means 21a is placed on the front side of the illumination lamp 21 as shown in the figure, and the microfilm F is illuminated with diffused light, so that the image on the screen (not shown) has no unevenness in light intensity between the center and the periphery. You will get an image that does not exist.

When printing, the operating means 41 removes the diffusion means 21a from the front side of the illumination lamp 21 to obtain the amount of light necessary for the copying process.

<Example> An example of the present invention will be described below with reference to FIGS. 1 and 2.

The illumination lamp 21 has a diffusion surface 21a on one side of the glass surface.
, and the other side is a transparent surface 21b,
Furthermore, it is fixed to a lamp base 40 having a rotation operation knob 41, and by turning the operation knob 41, it can be rotated by 180° in the clockwise or counterclockwise direction of the arrow.

The illumination lamp 21 illuminates the image on the microfilm F with an illumination system consisting of a spherical reflection mirror 22, a mirror 23, and a condensing lens 24, and the image is projected onto a screen or photosensitive drum (not shown) using a projection lens 25 or the like. ing.

Regarding the operation of this embodiment with the above configuration, when reading, as shown in FIG. To reduce the unevenness of light R. Also, when taking a print, turn the operating knob 41 and press the transparent surface 21 of the illumination lamp 21 as shown in FIG.
b is directed toward the film F side, and the amount of light directed toward a photosensitive drum (not shown) is increased to obtain the amount of light necessary for the copying process.

3 to 7 show other embodiments of the present invention. For the sake of simplicity, the lighting lamp part is excluded.
The same parts as those in the embodiment shown in FIG. 1 and 2W4 will be described with the same reference numerals.

In this embodiment, an illumination lamp 5 whose entire glass surface is a diffusion surface is used.
1a and an illumination lamp 51b whose entire glass surface is transparent are fixed to a lamp stand 52 in parallel, and the @53 protruding from the lower part of the lamp stand 52 passes through the elongated hole 35a of the illumination housing 35 and pivots to one end of the connection lever 54. The other end of the connecting lever 54 is pivotally supported by a pin 55a protruding from a circle W55 connected to the rotating shaft of a motor 56, and when the motor 56 rotates in the forward or reverse direction, the lamp base 52 is rotated to the right or to the right. It moves to the left so that the illumination lamp 51a as shown in FIG. 4 or the illumination lamp 51b as shown in FIG. 5 is located in front of the spherical reflecting mirror 22.

Regarding the optical path of the reader printer, the light from the illumination lamp 51a or 51b illuminates the image on the film F through an illumination system consisting of a spherical reflection mirror 22, a mirror 23, and a condensing lens 24. During printing, the image on the film F is illuminated by a projection lens 25, mirror 2
6.27, the image is projected onto the exposure part of the photosensitive drum 34 through the scanning mirror 31.32 and the slit 33a of the slit plate 33, and when reading, the scanning mirror 31.32 is moved to a position where it does not block the optical path to the screen 30. It is configured to move in the direction of the arrow in FIG. 7 to enlarge and project the image of the film F onto the screen 30 via mirrors 28 and 29.

FIG. 6 is a block diagram for controlling the reader printer described above, in which the print signal from the print switch 61 and the lamp position detection signal from the lamp position sensor 62 are controlled by the CPL.
The output signal is input to I63 and processed, and the rotation of the motor 56 is controlled via the motor drive circuit 66 to drive the illumination lamp 5.
1b is moved to a predetermined position, and a printer 65 is driven via a print drive circuit 64 to print.

The operation of this embodiment with the above configuration will be explained based on the flowchart of FIG.

First, turn on the reader printer (#1),
The lamp position l sensor 62 operates and the lighting lamps 51a, 51
Detect position b (#2).

At this time, if the illumination lamp is in the leader position, that is, if the illumination lamp 51a is not located on the optical path, the motor drive circuit 66 will operate, the motor 56 will rotate, and the disc 55. Connection lever 54. The lamp stand 52 is moved via the shaft 53 #3),
As shown in FIG. 4, when the illumination lamp 51a is located on the optical path, the motor 56 is stopped and the illumination lamp 51a is turned on (#4). In this state, an easy-to-read image with little unevenness in light intensity can be viewed on the screen 30.

Next, when taking a print, the illumination lamp 51a is turned off according to the input signal of the print switch 61 (#5).
6), the motor 56 rotates, the disk 55 and the connecting lever 54
, the lamp stand 52 moves in the direction of the arrow in FIG. 4 via the shaft 53 (#7), and the illumination lamp 51b is located on the optical path (#7).
#8), the motor 56 stops, and the illumination lamp 51b lights up (#9). Thereafter, as shown in FIG. 3, the scanning mirrors 31 and 32 move in the direction of the arrow to perform a scanning operation, and the image on the microfilm F is projected onto the photosensitive drum 34 and printed through a series of copying processes (#10). .

At this time, since the illumination lamp 51b is transparent, an appropriate amount of light can be obtained for the copying process.

When the printing operation is completed, the illumination lamp 51b turns off (#11), the motor 56 rotates again, and the lamp stand 52 moves in the direction of the arrow in Fig. 5 *), the illumination lamp 51a is positioned on the optical path, and the scanning mirror 31°32 moves in the direction of arrow B and becomes the leader state.

At this time, as described above, an easy-to-read image with less light intensity and darkness can be viewed on the screen 30.

In this way, only a special special lighting lamp is turned on when reading and when printing, and the lighting lamp 51a with a diffused surface is turned on only when reading, and automatically during printing operation: transparent. Since the illumination lamp 51b is turned on, the time for using an expensive illumination lamp with a diffusion surface is reduced compared to the case where one illumination lamp with a diffusion surface is used for both reading and printing. It has a longer lifespan and is advantageous in terms of cost.

FIGS. 8 and 9 show still other embodiments of the present invention.

In this embodiment, the illumination lamp 5 has the entire glass surface as a diffusion surface.
1a and an illumination lamp 51b whose entire surface is transparent.
The illumination lamps protrude outward through a and move on the illumination housing 44 in a direction perpendicular to the illumination optical path, thereby positioning any of the illumination lamps in front of the spherical reflecting mirror 22. The rest of the structure is exactly the same as the embodiment shown in FIG. 3 described above.

In this embodiment with the above configuration, in the reader state shown in FIG. 8, the illumination lamp 51a is located on the optical path,
Due to the diffused light a, the image on the screen (not shown) becomes a good image with little unevenness between the center and the periphery.

When printing, the state shown in FIG. 9 is changed from the state shown in FIG. 8 by moving the operating lever 52a in the left direction of the arrow. In this case, the illumination lamp 51b is located on the optical path, and a large amount of light reaches the photosensitive drum (not shown), so that a good print image can be obtained through a proper copying process.

In this way, only separate lighting lamps are turned on for reading and printing, which reduces the amount of time spent using expensive diffusion lighting lamps compared to transparent lighting lamps. The service life is longer than using one illumination lamp for both reader and printer.

<Effects of the Invention> As explained above, the present invention provides a means for diffusing the light from the illumination lamp during reading, and removes the diffusing means during printing (thereby, it is possible to easily reduce the amount of light when viewing a film image on a screen). This has the effect of providing easy-to-read images with less unevenness and providing appropriate light when printing.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of the reader state of an illumination device for a reader printer according to an embodiment of the present invention, FIG. 2 is a schematic diagram of its printing state, and FIG. A schematic configuration diagram of the reader printer according to the embodiment, FIG. 4 is an enlarged front view of the illumination device when it is a reader, FIG. 5 is an enlarged front view when printing, and FIG. 6 is a block diagram for controlling the reader printer. FIG. 8 is a front view of another embodiment of the present invention when it is a reader, FIG. 9 is a front view when it is printing, and FIG. 10 is a front view of another embodiment of the present invention. 1 is a schematic configuration diagram of a conventional reader printer. 21... Illumination lamp, 21a... Diffusion surface, 21b.
... Transparent surface, 41 ... Operation knob (operation means), 51
a...Illumination lamp on the diffused surface, 51b...Illumination lamp on the transmission surface, 52...Lamp base, 52a''・Operation lever, 56...Motor. Fig. 4 Fig. 5 Fig. 7 Figure 8 Figure 9 Figure 10

Claims (1)

[Claims] 1. An illumination device for illuminating the image of a microfilm reader printer, characterized in that it is provided with means for diffusing light from an illumination lamp when used as a reader, and has operating means for removing the diffusion means when used as a printer. .