Photographic lens system

Details Photographic lens system Photographic lens system

1996-11-08

1998-05-19

Nelms, David C.

Optical: systems and elements

Lens

Multiple component lenses

G02B 914

Patent

active

057543470

ABSTRACT:
A photographic lens system for compact cameras comprising in order from the object side: a first positive meniscus lens element having a convex surface on the object side; a second biconcave lens element; a third biconvex lens element; and a stop, wherein at least two lens element including the first lens element have refractive indices not exceeding 1.6. This photographic lens system is configured so as to be manufactured at a low cost and exhibit high optical performance by selecting an adequate focal length for the third lens element.

REFERENCES:
patent: 3784287 (1974-01-01), Grey
patent: 4787724 (1988-11-01), Kudo et al.

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