Aspheric optical elements

Details Aspheric optical elements Aspheric optical elements

1975-08-11

1976-09-14

Corbin, John K.

350175NG, G02B 304

Patent

active

039803996

ABSTRACT:
An optical element comprising a glass substrate on which a plastics material defining an optical surface is moulded. Shrinkage of the plastics material during curing is compensated for by allowing the glass substrate to deform due to the shrinkage, and optically working flat the outer surface of the glass substrate so that when the element is released from mould this outer surface will restore and take up a curvature which is equal to the amount of curvature lost at the moulded optical surface due to the shrinkage.
Fig. 1 is best suited for early publication purposes.

REFERENCES:
patent: 2868075 (1959-01-01), DeAngelis
patent: 3064401 (1962-11-01), Mooney
patent: 3210894 (1965-10-01), Bentley et al.
patent: 3486825 (1969-12-01), Howland

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