Photochromic light control mirror

Details Photochromic light control mirror Photochromic light control mirror

1993-07-28

1994-12-13

Ben, Loha

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359359, 359360, 359361, 359603, 359608, 359839, 359884, G02F 103

Patent

active

053733924

ABSTRACT:
A photochromic light control mirror comprises a photochromic substrate having a reflective film deposited at one side thereof. Alternatively, a mirror (i.e., a layer of glass having a reflective film deposited at one side thereof) is coated with a photochromic coating. An ultraviolet light source illuminates the photochromic material to change the reflectance of the mirror. The reflectance can be manually controlled whereby the intensity of the light source is controlled by adjusting the voltage driving the light source. Alternatively, the reflectance can be automatically controlled whereby the intensity of the light source is controlled by a photo detector which varies the voltage driving the light source in response to detected light.

REFERENCES:
patent: 2790350 (1957-04-01), Cameron
patent: 3756692 (1973-09-01), Scott
patent: 4906085 (1990-03-01), Sugihara et al.
patent: 5128799 (1992-07-01), Byker

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