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:
Oct. 05, 1993
Filed:
Sep. 30, 1992
Applicant:
Inventors:
Naota Uenishi, Osaka, JP;
Takafumi Uemiya, Osaka, JP;
Assignee:
Sumitomo Electric Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F / ;
U.S. Cl.
CPC ...
359328 ; 359710 ; 385122 ; 385142 ; 385145 ;
Abstract
A light source unit for receiving and transmitting information to and from an optical disk or the like, which reshapes an elliptical in cross-section beam of laser light into a circular in cross-section beam of laser light by a beam shaping assembly composed of at least one lens having a cylindrical surface and an optical axis, the cylindrical surface having generatrix lines that are perpendicular to the optical axis of the lens, where the circularly shaped beam of laser light then enters a wavelength converter for generation of a second harmonic (half wavelength of the fundamental).