1987-07-27
1989-06-13
Arnold, Bruce Y.
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
Hasegawa Shinichi
Yoshioka Takayuki
Arnold Bruce Y.
Gass Rebecca D.
Pioneer Electronic Corporation
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