Patent Document ID: 4799795
Application ID: 07115639
Patent Flag: 1

Claim One:
1. A radiation masking and redirecting assembly comprising: an electrically alterable mask device including substrate means presenting a pair of opposed faces and being relatively transmissive to radiations of selected wavelengths; a plurality of solid, electrically conductive masking structures supported upon one face of said substrate means and being electrically insulated from each other; and connector means electrically coupled with each of said masking structures respectively for connection of said respective structures with a source of electrical current for passage of electrical current through said masking structures as desired, each of said masking structures being formed of a diachromatic material which can be selectively altered between a condition where it is relatively transmissive for said radiations, and a condition where it is substantially opaque and relatively reflective for said radiations, by changing the magnitude of electrical current passing through the structure; and at least one mirror having a reflective surface diverging at a predetermined angle from said one face of said substrate means.