Miniaturized telephoto camera lens

Details Miniaturized telephoto camera lens Miniaturized telephoto camera lens

1977-08-25

1979-01-16

Sacher, Paul A.

350176, G02B 960

Patent

active

041346459

ABSTRACT:
A miniaturized telephoto camera lens assembly comprises a first positive lens, a second negative lens, and a third positive meniscus lens having a higher object side curvature. These lenses are disposed close together, and relatively remote from closely spaced fourth and fifth positive and negative meniscus lenses, respectively, each having higher object side curvatures. The optical parameters of the lens assembly are chosen to satisfy seven specified conditions relating to composite focal distances, spacing distances, Abbe numbers, and refractive index to optimize miniaturization while still achieving a high level of optical performance.

REFERENCES:
patent: 3887269 (1975-06-01), Nakagawa

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