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. 23, 1995
Filed:
May. 03, 1993
Applicant:
Inventor:
Patrick J Hood, Beavercreek, OH (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
359265 ; 359240 ; 359254 ; 359885 ; 359888 ;
Abstract
A spatially graded optical switch is described which comprises a transparent substrate, a layer of optically switchable material deposited on the substrate and having optical thickness which is a preselected function of radial distance from the center of the substrate, and electrical or thermal means for switching the material between an OFF state characterized by high transmission (or reflection) and an ON state at which transmission (or reflection) is attenuated smoothly with radius across the switch, according to a preselected profile, from substantially zero at the center to about 100% at the outer edge.