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:
May. 09, 1995
Filed:
Aug. 16, 1994
Applicant:
Inventors:
Assignee:
Dainippon Screen Mfg. Co., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ; G02B / ;
U.S. Cl.
CPC ...
359205 ; 359208 ; 359298 ; 359362 ; 359363 ; 359364 ; 359618 ; 359204 ; 359744 ;
Abstract
An afocal optical system is formed by a paraboroid mirror and an optical element having a stereographic projection characteristics which is defined by the following equation: