Temperature-compensated lens system

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Details

350432, G02B 312, G02B 1318

Patent

active

048386650

ABSTRACT:
A temperature-compensated lens system of positive power includes a plastic lens having a convex surface, and a liquid lens of negative power made of a liquid or gel material and held against the convex surface of the plastic lens, the liquid lens having a temperature coefficient dn/dT ranging from -4.times.10.sup.-4 to -2.0.times.10.sup.-4 /.degree.C. indicating the temperature-dependent variation in the refractive index of the liquid lens. The lens system is highly resistant to temperature-dependent variations.

REFERENCES:
patent: 695606 (1902-03-01), Grun
patent: 2794368 (1957-06-01), Kosa
patent: 3738734 (1973-06-01), Tait et al.
patent: 3944337 (1976-03-01), Ruben

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