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:
Apr. 24, 1990
Filed:
Aug. 24, 1989
Seiichi Ohsawa, Saitama, JP;
Pioneer Electronic Corporation, Tokyo, JP;
Abstract
A fibre-type light conversion device for converting the wavelength of an incident light. According to the first feature of the invention the device has a structure in which a holographic element whose complex transparency varies periodically with respect to the distance from an optical axis is used as a means for transforming the light, to which the conversion of wavelength has been performed by a fibre-type SHG, into a parallel light. According to the second feature of the invention, the device is constructed so that the temperature of the light source or the holographic element can be controlled, thereby a parallel light having planer wave fronts is surely generated irrespectively of differences in the shape of the fibre-type SHG or variations in the refractive index.