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. 28, 1981
Filed:
Jan. 14, 1980
George W Sutton, Lexington, MA (US);
Avco Everett Research Laboratory, Inc., Everett, MA (US);
Abstract
A laser mirror adapted to prevent astigmatism of reflected laser beams where the mirror is used for 'folding' the laser beam such that the incident laser beam direction is not normal to the reflective surface of the mirror. This is accomplished by the provision of slots of specified dimensions in the rear surface of the mirror that in use are disposed parallel to the major axis of the laser beam's image on the mirror. In this manner, the mirror is provided with two bending stiffnesses, one in the direction of the major axis that is greater than that in the direction of the minor axis such that the bending due to heating of the mirror in the direction of both axes is made at least substantially equal.