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:
Nov. 12, 1991
Filed:
Apr. 12, 1990
Paul H Pax, San Francisco, CA (US);
Continuum Electro-Optics, Inc., Santa Clara, CA (US);
Abstract
A laser resonator that is geometrically stable by classical definition is provided with beneficial characteristics of an unstable type through the use of a novel implementation of spatial filtering. A pinhole aperture is provided as part of, or on conjunction with, a mirror at one end of the cavity to cause light reflected from the mirror to diverge as it is directed toward the other end of the cavity. A spot focus of light, as usually found in spatial filters, is not utilized. The result is a laser cavity structure which provides a large mode beam within the cavity, a good quality output beam having a smoothly varying intensity distribution across it and which is easy to align.