JPH01116676A - Picture recorder - Google Patents

Abstract

PURPOSE:To execute an automatic exposure adjusting corresponding to an original concentration by arranging a light-receiving means to receive a scanning light from an exposing means between the exposing means and an interrupting means and controlling an exposing quantity to an image holding body by the scanning light according to a light-receiving quantity. CONSTITUTION:A light-receiving element 71 is provided between a projected light guiding scanning part 4 and a shutter mechanism 43, which light-receives the scanning light from a fifth fixing mirror to a picture forming part 3. When a copying starting key is pressed after the recording area of a picture projected on a projecting screen 1 is designated by a picture recording area designating member, a movable mirror 13 is moved, a projected light from a lens holder part 9 is scanned to the projected light guiding scanning part 4, and the scanning light is introduced to the light-receiving element 71. Thereafter, a detecting signal corresponding to the light quantity light- received with the light-receiving element 71 is outputted to a main control part 64, the main control part 64 judges the concentration of a microfilm, instructs a corresponding exposing quantity to an exposing quantity control part 72, and executes the lighting control of a light source 6. Thus, the automatic exposure adjusting corresponding to the microfilm can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an image recording device that records an image projected on a projection screen onto a recording medium by electrophotography.

(Prior Art) A microfilm reader printer is known as a means for recording information recorded on microfilm onto a recording medium. This microfilm reader printer enlarges and projects the information recorded on microfilm onto a projection screen, and records (hard copy) the image projected on the screen onto a recording medium using electrophotography. In some cases, a single sheet of microfilm may contain information other than the necessary information.

However, with the above-described apparatus, it was not possible to record only the necessary images from among the images projected on the projection screen onto the recording medium.

Furthermore, automatic exposure adjustment corresponding to the original density at that time was not performed.

(Problems to be Solved by the Invention) As mentioned above, it is not possible to record only the necessary images from among the images projected on the projection screen on a recording medium, and furthermore, automatic exposure adjustment is not required at that time. This eliminates the disadvantage of not being able to do this, and it is possible to record only the necessary images from among the images projected on the projection screen onto a recording medium, and also to automatically adjust the exposure at that time. The purpose is to provide a recording device.

[Structure of the Invention] (Means for Solving the Problems) The image recording device of the present invention includes a projection screen, a projection means for projecting an image onto the projection screen, and a charging device that is charged by scanning the projection light from the projection means. an exposure means for exposing an image carrier with scanning light; a developing means for developing an electrostatic latent image formed on the image carrier by the exposure means; A transfer means for transferring a visualized image onto a recording medium;

(Function) This invention provides an image recording area specifying member for specifying a recording area of an image projected on a projection screen, and an exposure means that exposes the image carrier according to the amount of movement of the image recording area specifying member. The scanning light from the exposure means is blocked by the blocking means, and a light receiving means for receiving the scanning light from the exposing means is disposed between the exposing means and the blocking means. The amount of exposure to the image carrier is controlled.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic cross-sectional view of a microfilm reader printer of the present invention, which includes a projection screen 1 for enlarging and projecting a microfilm, and a projection section 2 for projecting a film image onto the projection screen 1. , an image forming section 3 for copying the film image projected on the projection screen 1 onto a recording medium, and a projection light guide scanning section for guiding and scanning the projection light from the projection section 2 to the image forming section 3. 4, and a film setting section 5 for setting this micro.

The film setting section 5 includes a projection light source 6, a Fresnel lens 7 and a film holding plate 8 disposed above the light source 6, and directs the light source light from the light source 6 to the film through the Fresnel lens 7. A microfilm (not shown) held between presser plates 8 is irradiated with the light. The projection section 2 includes a lens holder section 9 provided above the film holding plate 8 and a screen projection section 10 provided behind the projection screen 1. ) is guided to the projection screen 1 via the lens holder section 9 and the screen projection section 10.

An objective lens 11 and a prism 12 are held in the lens holder section 9, and a film image projected onto the projection screen 1 can be focused by moving the objective lens 11 in the optical axis direction of the projection light. It has become.

Further, the prism 12 is rotatably held by the lens holder section 9, and by rotating the prism 12 by 180 degrees around the optical axis of the projection light, the projection screen 12 is rotated.
The projected image can be reversed.

The screen projection section 10 includes a movable mirror 13 and first and second fixed mirrors 14.15, and reflects the projection light that has passed through the lens holder section 9 on the first and second fixed mirrors 14.15. The microfilm is then enlarged and projected onto the projection screen 1.

Here, when the microfilm is projected on the projection screen 1, the movable mirror 13 is located outside the optical path of the projection light as shown by the imaginary line in the figure, and is connected from the lens holder section 9 to the first fixed mirror 14. It is designed so as not to obstruct the projection light entering the.

When copying a film image projected on the projection screen 1 to a recording medium, the lens is positioned on the optical path of the projection light as shown by the solid line in the figure, and the projection light from the lens holder section 9 is guided and scanned. The section 4 is composed of third to fifth fixed mirrors 16, 17, 18, and reflects the projected light from the movable mirror 13 on the fixed mirrors 16, 17, 18, and directs the light onto the photoreceptor drum 20 of the image forming section 3 (irradiation). It is supposed to be done.

That is, in this embodiment, the film setting section 5 and the first and second fixed mirrors 14 and 15 of the projection section 2 constitute a projection means, and the movable mirror 13 of the projection section 2 and the projection light guide scanning section 4 constitute a projection means. constitutes the exposure means.

Further, in the optical path after the fifth fixed mirror 18, that is, between the projection light guide scanning section 4 and the shutter mechanism 43, which will be described later, there is a section from the fifth fixed mirror 18 to the image forming section 3.
A light-receiving element 71 is provided to receive the scanning light.

The light receiving element 71 is composed of, for example, a CCD, and is configured to detect the amount of light of the scanning light.The detected amount of light is used to adjust the amount of exposure to the photoreceptor drum 20, which will be described later. It has become.

As a result, as in the case where the light receiving element 71 is placed between the shutter mechanism 43 and the photoreceptor drum 20, the optical path to the light receiving element is also blocked by the shutter mechanism, making it impossible to detect the original density. This problem can be eliminated. In this case, in order to avoid this problem, it is not necessary to provide a special mechanism such as a mechanism for retracting the shutter mechanism at the timing of detecting the document density.

The image forming section 3 has a photoreceptor drum 20 as an image bearing member approximately in the center of the image forming section main body 19, and around the photoreceptor drum 20, a charging device 21, a regular developing device 22,
Reversal developing device 23, transfer charger 24, peeling charger 25
, the cleaning device 26 and the static elimination lamp 27 are connected to the photosensitive drum 2.
0 (arrow a in the figure).

Further, in the lower part of the main body 19, the paper P, which is a recording medium taken out from the paper feed cassette 28 by a paper feed roller 29, is discharged through an image transfer section between the photoreceptor drum 20 and the transfer charger 24. A paper transport path 30 is formed to guide the paper to a paper tray 34, and a registration roller 31 is provided on the upstream side of this transport path 30, and a heat roller 32 as a fixing device and a paper ejection roller 33 are provided on the downstream side. It is arranged.

On the other hand, as shown in FIGS. 2(a) and 2(b), the projection screen 1 includes image recording area specifying members 35a, 35b, 36a for specifying the recording area (shaded area in the figure) of the projected image.
36b are provided in pairs in each of the horizontal and vertical directions of the projection screen 1.

These pair of image recording area designating members 35a135b,
36a and 36b are guide shafts 37 provided in the horizontal and vertical directions of the projection screen 1, as shown in FIG.
．． 38, and are each driven by a pulse motor 41.42 via a timing belt 39.4o.

Further, above the photoreceptor drum 20, a shutter device 43 serving as a light shielding means is provided near the photoreceptor drum 2°. As shown in FIG. 4, this shutter mechanism 43 consists of a slide shutter mechanism 44 and a full-face shutter mechanism 45 as shown in FIG. The scanning light from the projection light guide scanning section 4 is blocked depending on the projection light guide scanning section 4.

The slide shutter mechanism 44 is as shown in FIG.
Scanning light slit 4 formed in the image forming unit main body 19
A pair of slide shutters 47 that slide in the width direction of 6
a, 47b, a rack and pinion mechanism 48 that slides the slide shutters 47a, 47b, and a pulse motor 49 that drives the rack and pinion mechanism 48. The slide shutters 47a and 47b are slid according to the number of steps (41 steps).

Further, the entire surface shutter mechanism 45, as shown in FIG.
It consists of a full-face shutter 50 that opens and closes the scanning light slit 46, a link mechanism 51 that opens and closes this full-face shutter 50, and a solenoid 52 that drives this link mechanism 51, and the amount of movement of the image recording area designating members 35a and 35b. The entire surface shutter 50 opens and closes depending on the number of steps of the pulse motor 42.

Also, 53. is an operation panel for performing microfilm projection and copying operations, and this operation panel 5
3, as shown in FIG. 6, there are a copy start key 54, a copy number setting key 55, a clear key 56, a negative/positive development selection key 57, an automatic exposure key 58, an exposure amount adjustment volume 59, and a copy density adjustment volume. 60, cursor operation key 61a.

6lb, 61c, 61d, cursor speed switching keys 62as, 62bs, display section 63, etc. are provided.

The cursor operation keys 61a, 61b, 61c.

61d is an image recording area designation member 35a s 35b
-36a, 36b for moving the projection screen 1 in the horizontal and vertical directions, and the cursor speed switching keys 52a, 62b are for moving the image recording area specifying member
This is for switching the moving speed of 5a, 35b, 36a, and 36b between high speed mode and low speed mode.

FIG. 7 is a circuit diagram showing the control section of the microfilm reader printer, and 64 in the figure is a microprocessor (MPU) as the main control section. Various operation keys on the operation panel 53 and the light receiving element 71 are connected to the main control section 64, and the pulse motor 41, 42, 49 and the solenoid 52 are connected via the driver 73, 74, 75, 76. Further, an exposure amount control unit 72 is connected to the light receiving element 71 for adjusting the amount of light from the light source 6 in accordance with the amount of light of the original density determined by the light receiving element 71 .

Next, the operation in the above configuration will be explained. For example, when recording only a desired image on the paper P from among the images projected on the projection screen 1, first operate the cursor operation keys 61a to 61d on the operation panel 53 and use the image recording area specifying members 35a, 35b. , 36a, and 36b are moved to the image area (hatched area in the figure) to be recorded, as shown in FIG. 2(b). At this time, when the cursor speed switching key 62a is pressed, the image recording area specifying member 3
5a, 35. b, 36a, and 36b are switched to the high speed mode, and when the cursor speed switching key 62b is pressed, the moving speed is switched to the low speed mode, so that the recording area can be specified accurately in a short time.

In addition, the image recording area specifying members 35a135b, 36
When a and 36b move a predetermined amount, the main control unit 64 determines unnecessary image areas (portions other than diagonal lines) from the number of steps of the pulse motors 41 and 42 (stored in a memory (not shown)), and moves the image recording area specifying members 35a and 36b. The slide shutters 47a, 47b are slid according to the amount of movement of the sliders 35b, 36a, 36b, and the entire surface shutter 50 is controlled to open and close.

As a result, on the photoreceptor drum 20 of the image forming section 3,
Image recording area designation members 35a135b, 36a, 36b
Only the scanning light in the image area specified by is exposed.

Next, the recording area of the image projected on the projection screen 1 is determined by the image recording area specifying members 358% 35b% 36a, 36.
After specifying b, press the copy start key 54 on the operation panel 53.
When is pressed, the movable mirror 13 moves from the position shown by the imaginary line in the figure to the position shown by the solid line, and the projection light from the lens holder part 9 is scanned to the projection light guide scanning part 4. Then, the scanning light from the projection light guide scanning section 4 is guided to the light receiving element 71.

Thereby, a detection signal corresponding to the amount of light received by the light receiving element 71 is output to the main control section 64. Here, the main control section 64 determines the density of a microfilm (not shown) as an original based on the detection signal from the light receiving element 71, and instructs the exposure amount control section 72 to determine the corresponding exposure amount. Thereby, the exposure amount control unit 72 controls the lighting of the light source 6.

In this state, the main controller 64 drives the photosensitive drum 20 in the direction of arrow a in the figure. Then, first, the photoreceptor drum 2o is uniformly charged by the charging device 21, and the photoreceptor drum 20 is exposed to the scanning light from the projection light guide scanning section 4, and electrostatic latent is generated on the surface of the photoreceptor drum 20. An image is formed. This electrostatic latent image is transferred to the regular developer 22 or the reversal developer 2.
3, it is visualized and becomes a toner image.

On the other hand, the paper P taken out from the paper feed cassette 28 by the paper feed roller 29 is sent to the image transfer section between the photosensitive drum 2o and the transfer charger 24 by the registration roller 31,
The toner image is transferred by the transfer charger 24 .

Then, the paper P on which the toner image has been transferred is peeled off from the photoreceptor drum 2o by a peeling charger 24, and after the transferred image is melted and fixed by a heat roller 32, it is discharged from a paper discharge roller 33 to a paper discharge tray 34. be done.

Note that after the toner image is transferred to the paper P, the residual image on the photosensitive drum 20 is erased by the cleaning device 26 and the static elimination lamp 27, in preparation for the next copying.

As described above, the image recording area specifying member 35 a specifies the recording area of the image projected on the projection screen 1;
35 b, 36 a, 36 b on projection screen 1
The image recording area specifying members 35a135b, 36a,
By providing a shutter mechanism 43 that blocks the scanning light exposed to the photoreceptor drum 20 according to the amount of movement of the photosensitive drum 36b, only the necessary images from among the images projected on the projection screen 1 can be recorded on the paper P. can do.

In addition, during the above-mentioned recording, by arranging the light receiving element 1 for adjusting the exposure amount between the projection light guide scanning section 4 and the image forming section 3, it is possible to accurately record data compatible with microfilm without using any special mechanism. Exposure amount can be controlled.

In the above embodiments, a case has been described in which the amount of light from the light source is adjusted as a means for adjusting the amount of exposure to the photoreceptor drum 2, but the method is not limited to this, and it may be possible to adjust the developing bias,
The slit width may be adjusted.

Furthermore, the present invention can be applied to image recording devices other than microfilm reader printers.

[Effects of the Invention] As detailed above, according to the present invention, only necessary images from among the images projected on the projection screen can be recorded on the recording medium, and automatic exposure adjustment at that time can also be performed. It is possible to provide an image recording device that can perform the following operations.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a sectional view showing the schematic configuration of a microfilm reader printer;
2(a) and 2(b) are front views showing the projection screen, FIG. 3 is a perspective view showing the configuration of the image recording area specifying member, and FIG.
Figure 5 is a perspective view showing the configuration of the side shutter mechanism, Figure 5 is a plan view showing the configuration of the front shutter mechanism, Figure 6 is a plan view showing the configuration of the operation panel, and Figure 7 is a block diagram showing the configuration of the control circuit. It is a diagram. DESCRIPTION OF SYMBOLS 1... Projection screen, 2... Projection section, 3... Image forming section, 4... Projection light guide scanning section, 5... Film setting section, 6... Light source, 20... photosensitive drum,
35a, 35b, 36a, 36b... Image recording area designation member, 43... Shutter device, 44... Slide shutter mechanism, 45... Full surface shutter mechanism, 53...
- Operation panel, 64... Main control unit, 71... Light receiving element. Applicant's agent Patent attorney Takehiko Suzue (a) (b) Figure 2 Figure 4b Figure 5

Claims (1)

[Claims] (1) A projection screen, a projection means for projecting an image onto the projection screen, an exposure means for scanning the projection light from the projection means and exposing the charged image carrier with the scanning light, and the exposure means a developing means for developing the electrostatic latent image formed on the image bearing member by the developing means; a transfer means for transferring the visualized image formed on the image bearing member by the developing means onto a recording medium; An image recording area specifying member that moves in the horizontal and vertical directions to specify the recording area of the image projected on the same screen, and scanning that exposes the image carrier according to the amount of movement of this image recording area specifying member. a blocking means for blocking light; a light receiving means disposed between the exposing means and the blocking means for receiving the scanning light from the exposing means; An image recording apparatus comprising: a control means for controlling the amount of exposure to a carrier.