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. 02, 1995
Filed:
Feb. 17, 1993
Michael Horn, So. Setauket, NY (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
A person's sight may be seriously damaged when high levels of coherent light impinge upon one's eyes. In order to protect against this, a visor or windshield is equipped with a first layer of photosensor segments respectively and optically aligned with corresponding light-blocking segments which take the form of LCD material or photorefractive glass. Wherever light impinges upon photosensor elements, at levels above a preselected threshold, the corresponding light-blocking segments are switched to a light-blocking mode. The end result is the blocking of harmful light in only those portions of an entire field of view where harmful levels of light radiation exist.