The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 1987
Filed:
Jan. 06, 1986
John D Plumadore, Westfield, MA (US);
Photon Chroma, Inc., Westfield, MA (US);
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.