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:
Jan. 02, 1979
Filed:
Dec. 23, 1976
Applicant:
Inventors:
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355 11 ; 355 30 ; 355 71 ; 355 66 ;
Abstract
A converging lens projects a light image of an original document along an optical path onto the surface of a photoconductive drum. A dichroic mirror is disposed in the optical path to reflect the light image and has a reflectance characteristic selected in accordance with the spectral sensitivity characteristic of the drum. Unwanted wavelengths are transmitted through the dichroic mirror and absorbed by an absorption plate. The dichroic mirror and absorption plate are housed in a hermetically sealed casing with the converging lens being fixed to and constituting a portion of the casing.