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. 06, 2003
Filed:
Mar. 31, 2000
Applicant:
Inventor:
Takayuki Katoh, Kaisei-machi, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa-ken, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B 3/306 ;
U.S. Cl.
CPC ...
C30B 3/306 ;
Abstract
In an optical element which includes a single crystal having at least one flat light-transmitting end surface, the at least one light-transmitting end surface is inclined at at least 0.5 degrees relative to a plane perpendicular to one of an a-axis and a c-axis of the single crystal. In a process of producing such an optical element, a single crystal is cut out so that the single crystal has at least one surface which is inclined at at least 0.5 degrees relative to a plane perpendicular to one of an a-axis and a c-axis of the single crystal, and then the at least one surface is polished into at least one light-transmitting end surface.