Optical element and glass blank for producing the optical elemen

Details Optical element and glass blank for producing the optical elemen Optical element and glass blank for producing the optical elemen

1991-07-09

1992-12-01

Sugarman, Scott J.

Optical: systems and elements

Lens

Including a nonspherical surface

65 37, 65 39, 359708, G02B 304, C03B 1108

Patent

active

051684047

ABSTRACT:
Disclosed is a glass blank used in a producing process for molding an optical element by heating a glass material and press molding the glass material in a mold having optical functional surfaces. Employed is the glass blank having the glass surface coated with a reaction preventive layer and a hydrocarbon layer or with the hydrocarbon layer.

REFERENCES:
patent: 4840463 (1989-06-01), Clark et al.

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