Claims
- 1. A reader-printer in which the image of an original is selectively projected onto a photosensitive medium or a screen, said reader-printer comprising:
- illumination means for illuminating the original;
- optical means forming a first optical path for projecting the image of the original which is illuminated by said illumination means onto the screen when said reader-printer is operated in reader mode, and for forming a second optical path for projecting said image onto the photosensitive medium when said reader-printer is operated in printer mode, said optical means comprising a reflecting member for reflecting the light from the original;
- driving means for moving said reflecting member, said driving means moving said reflecting member to an exposure starting position in the printer mode and thereafter moving it from said exposure starting position to an exposure ending position in order to perform slit exposure;
- illumination control means for controlling said illumination means from the start of a change from the reader mode to the printer mode, to the start of the exposure of the image onto the photosensitive medium, while causing said illumination means to illuminate the original with a constant quantity of light;
- photo-detecting means for detecting the light from the original when the original is illuminated with the constant quantity of light in accordance with said illumination control means; and
- printer control means for controlling the operation of said reader-printer on the basis of an output from said photo-detecting means while causing said reader-printer to form the proper image on the photosensitive medium.
- 2. A reader-printer according to claim 1, wherein said reflecting member is moved by said driving means to the exposure starting position in the change of mode from the reader mode to the printer mode, and from said exposure starting position to said exposure ending position in the operation of said reader-printer.
- 3. A reader-printer according to claim 2, wherein said illumination control means causes said illumination means to illuminate the original before the movement of said reflecting member starts from said exposure starting position after the change of mode to the printer mode.
- 4. A reader-printer according to claim 1, wherein said reflecting member is disposed out of said first optical path in the reader mode and in said first optical path in the printer mode.
- 5. A reader-printer according to claim 1, wherein said photo-detecting means detects the light from the original which is reflected by said reflecting member and moves in a direction perpendicular to the moving direction of said reflecting member during the movement of said reflecting member.
- 6. A reader-printer according to claim 1, wherein said printer control means controls said illumination means on the basis of an output of said photo-detecting means during the movement of said reflecting member to said exposure ending position.
- 7. A reader-printer according to claim 1, wherein the image of the original is projected on said photo-detecting means by the movement of said reflecting member in the printer mode.
- 8. A reader-printer according to claim 1, wherein said photo-detecting means is disposed near said second optical path and detects the light from the original reflected by said second mirror.
- 9. A reader-printer according to claim 1, wherein said printer control means controls the bias voltage of development means.
- 10. A reader-printer according to claim 1, wherein said printer control means controls the light intensity of the exposure which is projected onto the photosensitive medium.
- 11. A reader-printer capable of being changed over between a reader mode in which the image on a screen is observed and a printer mode in which the image is reproduced, said reader-printer comprising:
- a projection lens for .[.selectively imaging the.]. .Iadd.projecting an .Iaddend.image of .[.an.]. .Iadd.the .Iaddend.original on the screen or a photosensitive medium;
- .[.reflecting means statically located on a first position in the reader mode, and moved in a direction across the optical axis of said projection lens in the printer mode in order to scan the original;
- a photosensitive medium receiving the light reflected on said reflecting means and moving with a constant speed;.].
- .Iadd.first reflecting means opposed to said projection lens and forming a reader optical path for guiding projection light through said projection lens to the screen;
- second reflecting means being movable into or out of an optical path between said projection lens and said first reflecting means, said second reflecting means, in the reader mode, being placed in a first position which is out of the optical path between said projection lens and said first reflecting means, and in the printer mode, being located in a second position which is in the optical path between said projection lens and said first reflecting means, said second reflecting means when located in the second position forming a printer optical path for guiding the projected light through said projection lens to the photosensitive medium; .Iaddend.
- driving means moving said .Iadd.second .Iaddend.reflecting means .[.in.]..Iadd., .Iaddend.said .[.direction, said.]. driving means first moving said .Iadd.second .Iaddend.reflecting means toward .[.a.]. .Iadd.the .Iaddend.second position and thereafter moving .[.it.]. .Iadd.said second reflecting means .Iaddend.from the second position to .[.a third.]. .Iadd.the first .Iaddend.position in the printer mode .[., and the image being exposed on the photosensitive medium firing the movement of said reflecting means from the second position to the third position.].;
- at least one light receiving element .[.on which the light from the original is not projected in the reader mode, and on which the light is projected by the movement of said reflecting means from the first to.]. .Iadd.for detecting the projection light through said projection lens, said at least one light receiving element being arranged in a position where said at least one light receiving element receives light, only when said second reflecting means in located in .Iaddend.the second position; and
- control means for .[.controlling the operation of said reader-printer on the basis of an output of light receiving element so that the proper reproduction image is formed.]. .Iadd.effecting control so that said at least one light receiving element may detect the projection light during the movement of said second reflecting means from the first position to the second position and so that a proper image may be formed on the photosensitive medium by a signal output from said at least one light receiving element during the movement of said second reflecting means from the second position to the first position.Iaddend..
- 12. A reader-printer according to claim 11, wherein said control means controls the light intensity of the exposure which is projected onto the photosensitive medium.
- 13. A reader-printer according to claim 11, further comprising a development means, and wherein said control means controls the bias voltage of said development means.
- 14. A reader-printer according to claim 11, wherein said light receiving element is moved in a direction intersecting the moving direction of said .Iadd.second .Iaddend.reflecting means during the movement of said .Iadd.first .Iaddend.reflecting means.
- 15. A slit exposure type copying apparatus in which the image of an original is projected onto a photosensitive medium so that the photosensitive medium is exposed, said apparatus comprising:
- a projection lens;
- a first mirror moving in a direction across the optical axis of said projection lens, for reflecting the light from said projection lens;
- a second mirror located on the reflection optical path of said first mirror and moving in conjunction with said first mirror, for reflecting the light from said first mirror toward the photosensitive medium; and
- a slit member located between said second mirror and the photosensitive medium and moving in a direction parallel with the moving direction of said second mirror, wherein the size of the slit remains unchanged during movement of the slit member.
- 16. A copying machine according to claim 15, wherein said first and second mirrors are disposed so that their reflection surfaces are perpendicular to each other, and are moved as a unit.
- 17. A copying machine according to claim 15, wherein said slit member is moved in conjunction with said mirrors, keeping the width of the slit constant. .[.18. A slit exposure type copying apparatus in which the image of an original is projected onto a photosensitive medium so that the photosensitive medium is exposed, said apparatus comprising:
- a scanning optical system for scanning an original;
- driving means for moving said scanning optical system;
- at least one light receiving element disposed on the optical path of said scanning optical system for receiving the light from the original;
- means for moving said light receiving element in a direction perpendicular to the scanning direction of said scanning optical system while causing said light receiving element to turn its moving direction at least once while said scanning optical system is scanning the original, wherein said light receiving element detects the density of an image; and
- control means for controlling said apparatus on the basis of an output of said light receiving element so that a proper image is formed on the photosensitive medium..]. .[.19. A copying machine according to claim 18, wherein said light receiving element is moved in conjunction with said scanning optical system..]. .[.20. A copying machine according to claim 18, wherein said scanning optical system is moved forward and backward, and wherein the image is exposed onto the photosensitive medium during the forward movement of said scanning optical system and the light from the original is detected by said light receiving element during the backward movement of said scanning optical system..]. .[.21. A copying machine according to claim 20, wherein said control means is controlled on the basis of an output of said light receiving element during the backward movement of said scanning optical system..]. .[.22. A copying machine according to claim 18, wherein said light receiving element is moved in said scanning direction while being moved in a direction perpendicular to said scanning direction..]. .[.23. A copying machine according to claim 22, further comprising a member on which said light receiving element is disposed, wherein said member is moved in a direction parallel to said scanning direction, and is moved in said perpendicular direction during the movement of said member in a direction parallel to said scanning direction..]. .[.24. A copying machine according to claim 18, wherein said light receiving element is disposed on said slit plate..]. .[.25. A slit exposure type copying apparatus in which the image of an original is projected onto a photosensitive medium so that the photosensitive medium is exposed, said apparatus comprising:
- a scanning optical system for scanning an original;
- driving means for moving said scanning optical system;
- at least one light receiving element for receiving the light from the original;
- movable supporting means for supporting said light receiving element wherein said supporting means moves in a direction parallel to the moving direction of said scanning optical system;
- means for moving said light receiving element in a direction perpendicular to the moving direction of said supporting means while causing said light receiving element to turn its moving direction at least once during the movement of said supporting means, wherein said light receiving element detects the density of an image; and
- control means for controlling said copying apparatus on the basis of an output of said light receiving element so that the proper image is formed
- on the photosensitive medium..]. 26. A reader-printer capable of being changed over between a reader mode in which an image of an original is projected onto a screen and a printer mode in which the image is projected onto a photosensitive medium, comprising:
- illumination means for illuminating the original;
- .[.reflecting means statically located in the reader mode, and moved in a direction across the optical axis of a projection lens in the printer mode in order to expose the image onto the photosensitive medium by scanning so as to reflect the light from the original toward the photosensitive medium; and.].
- .Iadd.a projection lens;
- a first mirror for forming a reader optical path guiding a projection light through said projection lens onto the screen;
- a second mirror displaceable in a direction across the optical path of said projection lens, said second mirror being movable in between said projection lens and said first mirror and out therefrom;
- a third mirror displaceable in the same direction as said second mirror and arranged at a predetermined angle with respect to said second mirror, said second and third mirrors forming a printer optical path guiding the projection light through said projection lens to the photosensitive medium;
- driving means for moving said second and third mirrors between a receded position and a scanning starting position in the printer mode; .Iaddend.
- at least one light receiving element .[.for receiving the light from the original to control the light intensity of the illumination means on the basis of the received light amount, said reflecting means being moved in said direction in the printer mode before the image is projected onto the photosensitive medium, so as to form an optical path for projecting the image onto said light receiving element..]..Iadd.arranged in a position in which, when said second mirror has been moved in the optical path between said projection lens and said first mirror, the projection light through said projection lens can be detected; and
- control means for detecting the projection light by said at least one light receiving element during the movement of said second and third mirrors from the receded positions to said respective scanning starting positions, and controlling said illumination means during the movement of said second and third mirrors from their respective scanning starting positions to their receded positions, on the basis of the signal output from said at least one light receiving element, the image of the original being exposed to the photosensitive medium during the movement of said second and third mirrors from their respective scanning starting positions to their receded
- positions. .Iaddend. 27. A reader-printer capable of being changed over between a reader mode in which an image of an original is projected onto a screen and a printer mode in which the image is projected onto a photosensitive medium, and is developed by development means which utilizes a developing bias voltage comprising:
- illumination means for illuminating the original;
- .[.reflecting means statically located in the reader mode, and moved in a direction across the optical axis of a projection lens in the printer mode in order to expose the image onto the photosensitive medium by scanning so as to reflect the light from the original toward the photosensitive medium; and.].
- .Iadd.a projection lens;
- a first mirror for forming a reader optical path guiding a projection light through said projection lens onto the screen;
- a second mirror displaceable in a direction across the optical path of said projection lens, said second mirror being movable in between said projection lens and said first mirror and out therefrom;
- a third mirror movable in the same direction as said second mirror and disposed at a predetermined angle with respect to said second mirror, said second and third mirrors forming a printer optical path guiding the projection light through said projection lens to the photosensitive medium;
- driving means for moving said second and third mirrors between a receded position and a scanning starting position in the printer mode; .Iaddend.
- at least one light receiving element .Iadd.arranged in a position in which, when said second mirror has been moved in the optical path between said projection lens and said first mirror, the projection light through said projection lens can be detected; and .Iaddend.
- .[.for receiving the light from the original to control the development bias voltage of the development means, on the basis of the received light amount, said reflecting means being moved in said direction in the printer mode before the image is projected onto the photosensitive medium, so as to form an optical path for projecting the image onto said light receiving element.]. .Iadd.control means for detecting the projection light by said at least one light receiving element during the movement of said second and third mirrors from the receded positions to the respective scanning starting positions, and controlling the developing bias voltage during the movement of said second and third mirrors from the scanning starting positions to the receded positions, on the basis of a signal output from said at least one light receiving element, the image of the original being exposed to the photosensitive medium during the movement of said second and third mirrors from the scanning starting positions to the receded positions.Iaddend..
Priority Claims (5)
Number |
Date |
Country |
Kind |
57-58191[U] |
Apr 1982 |
JPX |
|
57-67651 |
Apr 1982 |
JPX |
|
57-67655 |
Apr 1982 |
JPX |
|
57-69118 |
Apr 1982 |
JPX |
|
57-72367 |
Jul 1982 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 483,122, abandoned, filed Apr. 8, 1983.
US Referenced Citations (7)
Foreign Referenced Citations (5)
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Date |
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1125552 |
Jun 1982 |
CAX |
0021363 |
Jun 1980 |
EPX |
42856 |
Apr 1975 |
JPX |
138740 |
Dec 1978 |
JPX |
143569 |
Nov 1980 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
483122 |
Apr 1983 |
|
Reissues (1)
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Number |
Date |
Country |
Parent |
777028 |
Sep 1985 |
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