Composite glass and resin optical element with an aspheric surfa

Details Composite glass and resin optical element with an aspheric surfa Composite glass and resin optical element with an aspheric surfa

1992-05-19

1995-03-21

Sikes, William L.

Optical: systems and elements

Lens

Including a nonspherical surface

359642, 359708, 264 17, G02B 302, B29D 1100

Patent

active

054001820

ABSTRACT:
In order to provide an optical element with an aspheric surface, as well as a process by which the optical element can be mass-produced with high efficiency and consistent precision, the improved optical element with an aspheric surface includes a glass substrate and an overlying light-transmissive resin layer worked to have an aspheric surface. This optical element can be produced by molding a light-transmissive resin composition as it is cured between a glass substrate and a mold having an aspheric surfaced shape. The preferred light-transmissive resin has a Rockwell hardness of 40-80 on the M scale at -40.degree. C. to 60.degree. C.

REFERENCES:
patent: 3917766 (1975-11-01), Howden
patent: 4319945 (1982-03-01), Howden
patent: 4432832 (1984-02-01), Fantone
patent: 4657354 (1987-04-01), Kobayashi
patent: 4683153 (1987-07-01), Goepfert et al.
patent: 4738516 (1988-04-01), Verhoeven et al.
patent: 4758074 (1988-07-01), Yamakawa
Minolta Techno Report, "Compound Aspheric Lens"No. 2 1985.

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