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. 07, 1992
Filed:
Mar. 07, 1991
Applicant:
Inventor:
Terrence J McKee, Nepean, CA;
Assignee:
Lumonics Inc., Kanata, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ;
U.S. Cl.
CPC ...
372 29 ; 372107 ; 372108 ; 372 99 ;
Abstract
Variable attenuation of a light beam is achieved by mounting a rotatable multilayer dielectric attenuator in the beam. A first portion of the beam is transmitted through the attenuator and a second portion is reflected. Rotation of the attenuator about an axis transverse to the beam varies the ratio between these portions. The main application of this attenutator is to control an output characteristic, e.g. output power, of a laser, and may include a feedback loop to maintain this characteristic constant.