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. 13, 1990
Filed:
Mar. 09, 1989
George F Caudle, Chelmsford, MA (US);
Gary K Klauminzer, Lexington, MA (US);
Questek, Inc., Billerica, MA (US);
Abstract
A laser unit, including an optical power measuring device, measures, as the beam sample, a portion of the laser beam that is reflected out of the laser beam path by a wedge shaped front mirror, that is, an optical wedge. The front mirror has two surfaces, a partially reflective surface which reflects a portion of the beam back into the laser cavity and a nominally non-reflecting surface which permits a portion of the beam to exit the laser. The non-reflecting surface does in fact reflect some energy and, because of the wedge shape of the mirror, this energy is directed away from the laser beam path. The intensity of this off-path reflection is measured to determine the laser output power.