Lens system for electronic photography

Details Lens system for electronic photography Lens system for electronic photography

1998-10-16

1999-12-07

Epps, Georgia

Optical: systems and elements

Lens

Multiple component lenses

359740, 359753, 359783, 359708, G02B 1302

Patent

active

059993375

ABSTRACT:
A photographic lens system composed of a negative first lens group, a diaphragm, and a positive second lens group, in this order from the object side. The second lens group has a positive meniscus lens element having a convex surface facing the image side, a cemented sub-lens group having a positive lens element and a negative lens element, and a positive single lens element, in this order from the object side, wherein the photographic lens system satisfies the following conditions:

REFERENCES:
patent: 5155629 (1992-10-01), Ito et al.
patent: 5477389 (1995-12-01), Ito et al.
patent: 5513045 (1996-04-01), Ito et al.
patent: 5546232 (1996-08-01), Hirakawa
patent: 5684643 (1997-11-01), Enomoto et al.
patent: 5706141 (1998-01-01), Abe

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