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:
Oct. 15, 1991
Filed:
Nov. 09, 1989
Applicant:
Inventor:
Yuji Yasuda, Tokyo, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ; G03B / ;
U.S. Cl.
CPC ...
355 57 ; 355 60 ;
Abstract
Variable magnification optics for an image forming apparatus has a plurality of optical members, especially a first mirror and a lens located at the rear of the mirror, which are movable in association with each other and over a minimum of distance. This reduces the exclusive space which the optics occupies in the apparatus and, therefore, the overall dimensions of the apparatus. The mirror and lens which are interlocked with each other do not need independent drive lines, whereby the overall dimensions of the apparatus are further reduced.