Claims
- 1. An optical element comprising:
- a substrate having an approximately spherical surface with a radius of curvature; and
- a layer of synthetic resin on the spherical surface of the substrate, said resin layer having an aspherical convex outer surface with a collection of inflection points situated approximately on a circle, said layer having a varying thickness;
- characterized in that the minimum thickness of the resin layer is located adjacent to the collection of inflection points.
- 2. An optical element as claimed in claim 1, wherein said synthetic resin is an acrylate resin.
- 3. An optical element as claimed in claim 1, wherein said resin is a diglycidyl ether of biphenol A.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8400152 |
Jan 1984 |
NLX |
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Parent Case Info
This is a division of application Ser. No. 683,094, filed Dec. 18, 1984, now U.S. Pat. No. 4,623,496.
US Referenced Citations (2)
Foreign Referenced Citations (2)
Number |
Date |
Country |
1301551 |
Dec 1972 |
GBX |
1535986 |
Dec 1978 |
GBX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
683094 |
Dec 1984 |
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