Prismatic variable reflectance mirrors
First Claim
1. A variable reflectance mirror which comprises a device of reversibly variable transmittance, a planar front surface, and a planar reflecting means,(A) said device comprising(i) a medium of transmittance which is reversibly varied by electro-optic means, and(ii) two planar, parallel, spaced-apart surfaces, between which the medium of reversibly variable transmittance is held and through which light passes prior to and after reflecting from said reflecting means;
- with(B) the angle between the plane of said front surface and the plane of said reflecting means being 1°
to 5°
.
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Accused Products
Abstract
Prismatic variable reflectance mirrors are provided. In the mirrors of the invention, transmittance of reflected light is varied by thermochromic, electrochromic, photochromic or electro-optic means and the reduction in transmittance, which is required to eliminate perceptible reflection of an object to the eyes of an observer, is reduced by disposing the plane of the highly reflective surface of the mirror at an angle with respect to the plane of the surface through which light from the object enters the mirror.
25 Citations
7 Claims
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1. A variable reflectance mirror which comprises a device of reversibly variable transmittance, a planar front surface, and a planar reflecting means,
(A) said device comprising (i) a medium of transmittance which is reversibly varied by electro-optic means, and (ii) two planar, parallel, spaced-apart surfaces, between which the medium of reversibly variable transmittance is held and through which light passes prior to and after reflecting from said reflecting means; - with
(B) the angle between the plane of said front surface and the plane of said reflecting means being 1°
to 5°
. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- with
Specification