Photocopying – Including fiber optics
Patent
1986-01-06
1987-06-30
Prescott, A. C.
Photocopying
Including fiber optics
355 3R, 355 40, 355 53, 355 54, 355 64, 355 11, G03G 1526, G03G 1500
Patent
active
046766260
ABSTRACT:
An optical system for an electrophotographic film camera/reader-verifier. The image is transmitted downwardly to a first mirror (28) fixed at an angle of approximately 45.degree. with respect to either a horizontal or vertical plane. The image is, in turn, transmitted to a second mirror (32) fixedly disposed within a vertical plane, and a focusing lens (36) finally transmits the image to a film element for recording thereon. When an image frame of the film element is to be viewed, read, or verified, a projection lamp (40) is energized for illuminating the film element whereby the illuminated image thereof is transmitted to a third mirror (44), which is located at an inclined angle of approximately 15.degree. with respect to a horizontal plane. The mirror (44) in turn transmits the image of the film element to a front projection screen (46) which is also fixedly disposed at an angle of approximately 15.degree. with respect to a vertical plane. During a reading or verifying mode, the original document is removed from the copyboard (20) whereby viewing of the projection screen (46) is achieved through the clear-glass copyboard (20). The film element is blue light-insensitive, and the projection screen (46) is tinted or colored blue such that an image of the screen (46) is not recorded upon the film during an imaging or recording mode. A blue-colored filter (50) is interposed such that only a blue-colored image of the film element image frame is transmitted to the project screen (46) for maximum contrast.
REFERENCES:
patent: 3951543 (1976-04-01), Mulligan
patent: 4286864 (1981-09-01), Lysle et al.
patent: 4324484 (1982-04-01), Johnson
patent: 4341463 (1982-07-01), Kashiwagi et al.
patent: 4461566 (1984-07-01), Plumadore
Photon Chroma, Inc.
Prescott A. C.
LandOfFree
Optical system for electrophotographic film camera/reader-verifi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical system for electrophotographic film camera/reader-verifi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical system for electrophotographic film camera/reader-verifi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-444772