Optical device

Details Optical device Optical device

1993-03-22

1995-02-21

LaRoche, Eugene R.

Optical: systems and elements

Light interference

Produced by coating or lamina

359577, 359578, 359579, 359580, 428216, G02B 110, G02B 528

Patent

active

053921569

ABSTRACT:
An optical device is composed of: a transparent base plate formed of a glass or a macromolecular resin; a first layer formed of a substance having a refractive index of 1.58 or higher; and a second layer formed of an amorphous transparent fluorocarbon resin having a refractive index of 1.35 or lower. The second layer is farther from the transparent base plate than the first layer from the transparent base plate. The first and second layer constitute a film for preventing reflection. Optionally, adhesive layers are provided between the transparent base plate and the first layer and between the first layer and the second layer. Further optionally, the surfaces of the transparent base plate and the first layer are treated in order to enhance adhesion between the contact surfaces.

REFERENCES:
patent: 4759990 (1988-07-01), Yen
patent: 5002832 (1991-03-01), Osano
patent: 5170290 (1992-12-01), Szcyrbowski et al.
Cox et al., Two-Layer Anti-Reflection Coatings for Glass in the Near Infra-Red, 1957, Vacuum vol. IV No. 4, pp. 445-455.
Patent Abtracts of Japan, vol. 13, No. 30 (P-816), Jan. 24, 1989 & JP-A-63 228 101 (Nippon Sheet Glass), Sep. 22, 1988.
Patent Abstracts of Japan, vl. 9, No. 58 (P-341), Mar. 14, 1985 & JP-A-59 195 203 (Matsushita Denki Sangyo), Nov. 6, 1984.
Database WPI, Week 9304, Derwent Publications Ltd., AN 93-029961 & JP-A-4 355 401 (Mitsubishi Rayon, Dec. 9, 1992.
Database WPI, Week 8944, Derwent Publications Ltd., AN 89-320802 & JP-A-1 239 191 (Goyo Shiko), Sep. 25, 1989.
Database WPI, Week 9030, Derwent Publications Ltd., AN 90-229436 & JP-A-2 159 281 (Terumo Corp.), Jun. 19, 1990.

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