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, 1990
Filed:
May. 24, 1989
Applicant:
Inventor:
Yuji Yasuda, Kanagawa, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V / ;
U.S. Cl.
CPC ...
362296 ; 362216 ; 362297 ; 350630 ; 355 67 ;
Abstract
An illuminating device for uniformly illuminating a planar object has a single light source and a reflecting mirror. The planar object is illuminated by light reflected from the reflecting mirror. The reflecting mirror has a reflecting surface shaped to cause the reflected light to uniformly illuminate the planar object dependent on whether the planar object is illuminated directly or through a transparent plane-parallel plate such as a glass plate, or dependent on the type of the light source.