Miniaturized telephoto camera lens assembly

Details Miniaturized telephoto camera lens assembly Miniaturized telephoto camera lens assembly

1977-08-25

1979-02-13

Clark, Conrad J.

G02B 1302

Patent

active

041392647

ABSTRACT:
A telephoto lens assembly comprises a first positive lens, a second negative lens, third and fourth positive meniscus lenses having higher object side curvatures, a fifth negative lens, and a sixth positive lens adhered to the latter. The optical parameters of the lens components and assembly, including various composite focal distances, Abbe number products, and refractive index products, are chosen to satisfy prescribed, interrelated mathematical conditions to achieve satisfactory optical performance with an overall lens assembly length of less than 0.85 times the focal distance.

REFERENCES:
patent: 3467462 (1965-07-01), Kazamaki et al.
patent: 3502393 (1967-03-01), Kazamaki et al.
patent: 4045128 (1977-08-01), Momiyama

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