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. 07, 1991
Filed:
Feb. 28, 1990
Yuji Ikeda, 111-1 Miyasaka, Suishasindenaza, Nada-ku, Kobe-shi, Hyogo-ken, JP;
Tsuyoshi Nakajima, Takarazuka-shi, Hyogo-ken, JP;
Other;
Abstract
A beam expander is used with a perforated concave lens and a plano convex lens to expand a beam diameter to make a small measurement volume to increase an intensity of light scattered, which contributes a reduction of a number of an optical components and a complicated optical adjustment, and makes a small probe diameter. The perforated part of the expand lens plays a role of a space filter to cut off troublesome light scattered when a beam passes through a lens. A three points supporting mechanism adjustment of the focused beam positioning into the fiber core and the incident beam aperture adjustment in the fiber's numerical aperture are used. A high resolution of the adjustment is achieved so that a high transmitting efficiency of a laser power into the fiber is achieved.