JPS5868080A - Electrophotographic camera reader - Google Patents

Abstract

PURPOSE:To suppress overheat due to a light source in case when projection and photographing are executed by one device, and also to shorten a set-up time, by using a heating lamp used for fixation at the time of photographing jointly as a light source at the time of projection, and providing a heat shield optical member between the lamp and a photosensitive material at the time of projection. CONSTITUTION:At the time of photographing, an unphotographed part of a photosensitive material 13 is charged by a charger 33, and after that, records a reflected image of an original 11' by a photographing lens 12, as an electrostatic latent image, and is developed to a toner image by a developing device 34. The photosensitive material 13 further moves to a fixing position and is fixed by heat of a heating lamp 21 in a state that a heat shielding filter 20 is detached. At the time of projection, the lamp 21 is used as a light source, and a image is projected on a light diffusion plate 15 by a projection lens 19. The insulated filter 20 prevents the photosensitive material 13 from deforming and changing in its quality due to heat of the lamp 21. The fixed image is projected on a screen at the fixed position, therefore, the image can be monitored in the course of fixation.

Description

DETAILED DESCRIPTION OF THE INVENTION This electrophotographic camera reader is equipped with a recording section for electrophotographically recording a group of manuscripts on a photosensitive paulownia material, and a projection section for projecting the recorded image on a photoreceptor 1. It is something.

A microfilm/recording device that photographs and records an image of an original on microfilm (hereinafter referred to as a microcamera)
Microreaders that project images on recorded microfilm are both well known and widely used. However, these are separate devices, and it is not known that they are fully combined.

This is because the photosensitive film used for microfilm generally uses silver halide photographic film or diazo film, which takes a long processing time and takes up a lot of space when developing the photographed film. The reason for this is thought to be that there is a time interval between photographing and projection (because of the development process involved, the two naturally have to be separated).

Here, a system that integrates a camera and a reader using a microfilm format made of silver halide photographic film (or diazo film) is used. In principle, the system records all the recorded frames and projects the remaining unphotographed parts at a later date (C is acceptable. However, as a microfilm, ordinary silver salt photographic film or diazo film can be used. If recorded frames and unphotographed parts coexist when using , the light from the high-intensity light source used to project the recorded frames is prevented from entering the unphotographed parts of the film, causing fog. It is very difficult to eliminate the film, and furthermore, it is necessary to change the film at -11, which leaves unphotographed parts, which requires a longer processing time and processing space. In addition, if the unexposed parts of the film were to be completely shielded from light, a new technical problem would arise.

When considering the above-mentioned system, the present inventors believe that the electrophotographic method is substantially photosensitive until the photosensitive material is charged, and furthermore, the effect of exposure performed before development is based on the well-known physical method. Since it is possible to erase the data using the method described above, it is extremely suitable for systems such as the one described above.

Therefore, the present inventors adopted electrophotography as a method of photographing on microfilm, making it possible to take photographs on long microfilm, for example, by skipping intervals for each theme, and to take additional photographs at a later date for the unrecorded parts. By doing so, they devised a system that required microfilm to be transported back and forth between the imaging section and the projection section.

This system is useful when you want to randomly and sequentially record a large number of different types of information and retrieve the information by type as needed, or when you want to search and project by type during projection (playback). Useful.

In this system, for example, ■ When additional shooting is performed on an unshot part of a partially shot film, when projecting the previously shot film to confirm the type of film and the position of the shooting frames, 2. 3. When it is necessary to monitor the recorded images after recording them, such as when photographing important documents or originals that require changing the photographing conditions, etc. Since recording (photography) and playback (projection) are frequently repeated, it is better to have the photographing section and projection section adjacent to each other.
However, it is desirable to have all these functions integrated into one device.

In this electrophotographic method, charging, exposure, development, and fixing processes are performed at the time of photographing, and a heating lamp is used for the fixing, and a projection light source (projection lamp) is used for the projection. Is it possible to provide this heating lamp and projection light source separately?Is it possible to use the above-mentioned features of the camera reader to view images from photography to projection, or from projection to photography? tΩ11 at t5, the camera reader function is turned off at the opening of the mountain. is turned on, the projection light source is turned off, the heating lamp is turned off during projection, and the projection light source is at point tI.At the same time, the heating lamp and the projection light source are alternately switched at the same time, and unless the lamp is turned on or the main light is turned off, t
(No. This heat generating lamp and the projection light source both have a large heat generation M1, so when switching from lighting to turning off. The temperature of ℃・o will not drop suddenly.
Therefore, it is thought that the temperature inside the camera reader becomes considerably high due to this residual heat and the heat generated from the lit rungs. For this reason, practical applications require considerable cooling equipment, such as large cooling fans. This is a very big problem even when trying to increase the degree of integration within the camera reader and make it more compact.

In addition, in the above switching, when the switch is made from projection to photography, the heating lamp turns on at the same time as the above switching, but it takes a certain amount of time to reach the temperature required for setting the pot (7-up time). This time becomes a wasteful waiting time for the user of the camera reader.

In order to eliminate these above-mentioned problematic factors, it is preferable to perform both photographing and projection functions using a single heating lamp or projection light source that does not require turning on and off.

In addition, during projection, there is a risk that the photosensitive IJ of the projected area may be altered and deformed due to the heat generated by the projection light source.
A heat-insulating optical member such as a heat-insulating filter is required between the film and the film.

The present invention suppresses overheating due to heat generation of the heat source and light source when projection and photographing are repeatedly performed by changing one blade, and greatly reduces set-up time when photographing immediately after projection. The purpose is to provide a camera reader.

The electrophotographic camera reader of the present invention uses a heat-generating lamp used for fixing during photographing also as a projection light source required during projection, and a heat-insulating optical member is provided between this lamp and the photosensitive material to be projected during projection. 4.
Further, in the present invention, the photographing lens may also be used as the projection lens.

This can be done by moving the heating lamp so that it is located in the fixing processing section during photography and in the exposure processing section during development, or by fixing this lamp in the fixing processing section and placing a reflective optical member in the exposure processing section. It may be provided.

In this way, in the electrophotographic camera reader of the present invention, the heat generating lamp and the projection light source are integrated, so that the heat problem and the problem of long run-up time that would otherwise occur when the two are provided separately, as described above, are solved. . In other words, shooting and projecting consecutively or alternately? ], the heat generated by the camera reader as a whole does not increase, so there is no need for a large-scale cooling system that would be required if two lamps were installed.

Especially when taking pictures immediately after projection, the residual heat of the lamp can be seen as a great advantage in electrophotographic camera readers, since it makes it possible to eliminate set-up time. In addition, the number of lamps is reduced to 1 compared to the case where a heat lamp and a projection light source are installed individually.
can be reduced.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention, and shows an example of an electrophotographic camera reader equipped with an original photographing table and a screen.

A transparent support plate II is provided horizontally on the upper surface of the housing 10, and serves as a photographing stand. The camera lens 12 is placed on this +, and the darkest part of the micro 1 is placed on the line 'fI'.゛) Relo Shimoko Photography Kiritsuki 1:3 to Hara 1'M-
An image 1' is formed which is the opposite image of f. Twelve illumination lamps 14 are arranged diagonally below the transparent support plate 11, 1 is arranged in the housing 10, and a light diffusing plate 15 is arranged in an upward direction (I7J), which is better than vertical. b) The projection screen is permanently installed. , An image of the photosensitive material 13 is formed on the light diffusing plate I5 of the projection screen by a projection lens lq via two mirrors 17 and 18. A heat lamp 21 is disposed on the back side of the photosensitive material 13 via a heat shield filter 20 in a heat shield optical section. Heat insulation filter 20
is removed in order to supply heat from the heating lamp 21 to the photosensitive material 13 during fixing 4, and the sensitive material 13 is removed from the feed roll 31 to the take-up roll 3
2, the charger 33° photographing lens 12,
Pass through the developing device 34 and the heat lamp 21 for fixed wood in this order 1
These means are arranged at predetermined intervals so as to

Next, we will discuss the functions and effects of the camera reader shown in FIG. 1 during photographing and projection.

When photographing, a desired blank area (unphotographed area) of the photosensitive material 13 is charged with a photosensitive material 1533, and then moved to the photographing position (the position of the photographing lens 12). The reflected image of the original image illuminated by 14 is recorded by the photographic lens 12 and an electrostatic latent image is formed by the photographic lens 12.Then, an electrostatic latent image is formed by the developing device 34 at the developing position adjacent to the photographing position. The image is developed into a toner image, and then moved to the fixing position, where the 1st image is fixed by the heat of the heating lamp 21. At this time, fixing cannot be performed with the heat protection filter 20 removed. , - When projecting, move the desired image part of the photosensitive film 13 in which the image is recorded to the projection position, and then
is inserted between the lamp 21 and the lamp 21, which is exposed to light by the heat of the lamp 21 during projection.
In order to prevent the old 13 from deforming and deforming, this embodiment has a photographic lens and a lens that are separately provided, so that both the photographed and held positions are fixed. At the same time, the image is projected onto the screen 15 at the fixing position %fK, so the image being fixed can be monitored.

FIG. 2 shows a second embodiment of the invention.

The charger 33, the photographing/projection lens I2, and the developing device 34 are arranged at the same position 16 as in the first embodiment. The heating lamp 21 is arranged so that it moves to the fixing processing section during fixing and moves to the exposure processing section during projection. The heat shielding filter 40 is located at the internal light processing area during projection.
The photosensitive material 12 is inserted between the heating lamp 21 and the photosensitive material 13.

Next, the functions and effects of the camera reader shown in FIG. 2 during photographing and projection will be described.

In terms of photography, the heat generating lamp 21 is located in the fixing processing section, and fixing is performed using the heat generated from the heat generating lamp 2I.

During the 4'U shadow, the heat generating lamp 21 is located in the exposure processing section and emits light onto the photosensitive material 13 having an image to be photographed. This light passes through a heat insulating film 40 such as an infrared absorbing filter, passes through a photosensitive material I3 having an image, and a photographing and projecting lens 12 to form an image on a screen.

In this embodiment, the photographing lens is also used as a projection lens during projection, and by kneading, a transparent support plate is placed on the photographing stand during photographing, and a light diffusing plate is placed during projection. and projection is performed.

In addition, when the photographing stand and the screen are installed in different positions as in the embodiment of the mackerel 1, the heat is emitted from the heat generating lamp 21 and the heat shielding filter 40 is exposed to light.
For projection [・pass in the order of 12'' a) Reflected by the converging mirror -l ↓ and project on x clean 1-1'' 6, this]
]9 When the distances of the light l1fi -l from the photographing stand to the screen are different, the lens intersection is 1μ·'1. Focal length: 0. i) 9J change (・(-yoC) focus-
)1゛Moyo (1,, Itcho No. 3 A ('El, No. 13, j, ;, L
c) L) No. 3
・Te band ii device; 3; 3, Jj'i☆Shadow and projection lens 12
,oh. 1, bi''l! 1) device', 31 eyes 4, first embodiment and rotation)・Ilc is arranged a), so ju l・,
- I'll omit the straw explanation).

Figure 3A shows the third embodiment.
.

The heat-generating lamp 21 is fixed in the vessel processing section.] The reflective optical section 41 is exposed to light. Project +
1! Optical axis of J (photosensitive section 1113, photographing/projection lens 12
, screen), i]te(・ru3,1
(The IJ heat filter 22 is arranged so as to be inserted between the heat generating lamp 21 and the reflective optical part 41.
The shutter 50, which has heat insulation and light shielding effects, is used during projection (
A shutter 51 is inserted between the r (photosensitive part) 113 and the heat generating lamp 21, and is arranged to be removed when the temperature is set, and has the same effect. It is inserted so that it can be removed during projection.

Next, the functions and effects of the camera reader shown in FIG. 2 during photographing and projection will be described.

When the frame to be fixed during photographing comes to the fixing position, the imager 50 opens and heat emitted from the heat generating lamp 21 is supplied to the photosensitive member 13 for fixing. The shutter 51 placed at the front is closed so that the charging, exposure, and development processes are not interfered with by the light (C) emitted from the heat lamp 21.

At the time of projection, the shutter 51 is opened and the light emitted from the heat generating lamp 2I is absorbed by the heat shielding filter 22 to absorb infrared light, and then reflected by the reflective optical part (A4) to the photosensitive part 4'.
A' + 3 years old d3L] No shadow and projection lens 12 j
When the projection reaches the end of the screen and forms the image 1, the imager 50 is designed to prevent the photosensitive material 13 from being altered or deformed by the heat emitted from the heating lamp 21 when the projection is rotated for a long time. , is inserted between the heat generating lamp 21 and the photosensitive ('AAl2O).

Compared to the second actual Mj example, the embodiment of this publication 3 eliminates the need for a mechanism for moving the heat-generating lamp 21 by providing the reflective optical member 41 and the mirrors 50, 51.
Only one lens is required compared to the embodiment.

FIG. 3B does not show the fourth embodiment.

This embodiment is based on the reflective optical section (A) in the third embodiment.
41 is replaced with (', Jj thermal mirror 42, thereby eliminating unnecessary heat insulating fin filter 22).

The operation and effect of this embodiment are the same as those of the third embodiment shown in FIG. 3A, but no heat shielding filter is required.

The 3C diagram shows an example of the 5th century.

In this embodiment, the heat-insulating optical member 22 disposed between the reflective optical member 41 and the shutter 51 located at the time of fixing is replaced with the photosensitive material in the third embodiment shown in FIG. 3A. It is arranged between I3 and the reflective optical member 4I.

The effects of this embodiment are the same as those of the third embodiment shown in FIG. 3A.

As explained in detail above, the photo camera reader according to the present invention uses a heat-generating lamp as a projection light source during projection, thereby reducing the temperature rise inside the camera reader that would otherwise occur when a heat-generating lamp and a projection light source are provided separately. This eliminates the problem of requiring setup time to preheat the heating lamp when switching between shooting and projection functions (especially from projection to shooting), and has the great practical advantage of reducing the number of lamps by one. It has the following.

[Brief explanation of the drawing]

FIG. 1 is a side view of an electrophotographic camera reader showing a h'+1 embodiment of the present invention, and FIG. 2 is a side view of an electronic b'+1 camera reader showing a second embodiment of the present invention.
Figure 3A is a partial side view of an electronic photo camera reader showing the third embodiment of the present invention, and Figure 3B is a partial side view of an electronic photographic camera reader that does not show the first embodiment of the present invention. '
” gl (Side view, Figure 3C shows an embodiment of the u゛55 of the present invention.
i side 1) Z). 13. Photosensitivity 20, 22. ．． 10.Heat-proofing filter 21...Heat-heating lamp 21...Reflection optical part 5442...Heat-proofing mirror

Claims (7)

[Claims] (1) An electrophotographic photosensitive material in the form of a roll film is sequentially stopped and moved to charging, exposure, development, and fixing processing sections arranged at predetermined intervals, and a large number of images are sequentially and sequentially formed on the photosensitive material. While recording the image on the electrophotographic light-sensitive material after fixing, an electrophotographic camera reader is used to project the image on the electrophotographic light-sensitive material onto a screen using a projection lens. An electrophotographic camera reader characterized in that a heat-insulating optical member is provided which also serves as a projection light source for projection and is inserted between the lamp and the electrophotographic photosensitive material during projection. (2) The electrophotographic camera reader according to claim 1, wherein the projection lens is also used as a photographing lens disposed in the exposure processing section. (3) The electronic photograph according to claim 2, characterized in that the heating lamp moves to be located in the fixing processing section during photographing and in position in the exposure processing section 1 during projection. camera reader. (4) The heat generating lamp, which also serves as a projection light source, is fixedly installed in the fixing processing section, and a reflective optical member that reflects the light emitted from the lamp toward the photosensitive material of the projection exposure processing section is provided in the exposure processing section. An electrophotographic camera reader according to claim 1 or 2, characterized in that the reader is provided with: (5) The electrophotographic camera reader according to claim 4, wherein the heat-insulating optical member is provided between the heat generating lamp and the reflective optical member. (6) The electrophotographic camera reader according to claim 4, wherein the heat-insulating optical member is provided between the reflective optical member and the photosensitive material in the exposure processing section. (7) The electrophotographic camera reader according to claim 4, wherein the reflective optical member is a heat-insulating mirror.