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. 12, 1992
Filed:
Sep. 05, 1990
Applicant:
Inventors:
Kiyofumi Chikuma, Saitama, JP;
Sota Okamoto, Saitama, JP;
Assignee:
Pioneer Electronic Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
359332 ; 385 33 ; 385122 ; 359328 ;
Abstract
A fiber-type light conversion device comprises: a fiber-type light conversion element having a core made of non-linear optical crystal for changing the wavelength of an incident light to half by the phase matching of Cerenkov radiation; and a collimating optical system for transforming an emergent light beam emitted from the light conversion element into a parallel light beam, wherein the collimating optical system has lenses having a large spherical aberration .DELTA.z. Furthermore, the quantity of spherical aberration .DELTA.z is determined so as to satisfy the following equation of: