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. 12, 1990
Filed:
Jun. 03, 1988
Applicant:
Inventors:
Noritaka Mochizuki, Yokohama, JP;
Chikara Jin, Tokyo, JP;
Assignee:
Canon Kabushiki Kaishi, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ; F21V / ;
U.S. Cl.
CPC ...
362 33 ; 362247 ; 362296 ; 362297 ; 355 67 ; 355 71 ; 350237 ;
Abstract
An illuminating device comprises a light-condensing block forming a transparent pillar member having a greater refractive index than the ambience and having a cross-sectional shape forming a part of an ellipse, and a light source disposed axially of the pillar member in a focal plane containing one focus of the ellipse for illuminating an object through the light-condensing block.