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:
Mar. 15, 1988
Filed:
Jan. 29, 1985
Applicant:
Inventors:
Makoto Uehara, Tokyo, JP;
Hideo Mizutani, Yokohama, JP;
Kiyoyuki Muramatsu, Yokohama, JP;
Takeshi Asami, Kawasaki, JP;
Akikazu Tanimoto, Yokohama, JP;
Assignee:
Nippon Kogaku K. K., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ; G01J / ;
U.S. Cl.
CPC ...
350253 ; 350409 ; 350418 ; 374132 ; 355 55 ;
Abstract
A projection optical apparatus comprises illuminating means providing for an illuminating light beam, a projection optical system including optical elements disposed across the illuminating light beam and having an imaging plane, and detecting mean including temperature sensor means provided on at least one of the optical elements and producing an output corresponding to the temperature of the one optical element.