Super-wide-angle optical system and image pickup device

Details Super-wide-angle optical system and image pickup device Super-wide-angle optical system and image pickup device

2007-11-27

2007-11-27

Vu, Ngoc-Yen (Department: 2622)

Television

Camera, system and detail

Optics

C359S753000

Reexamination Certificate

active

10864727

ABSTRACT:
A super-wide-angle optical system for forming an optical image of an object on an image pickup surface of an image sensing device that converts the optical image into an electrical signal is provided with, in order from the object side, a first negative lens, a second negative lens and a positive lens. The first negative lens has a meniscus shape convex to the object side. The second negative lens is positioned next to the first negative lens. The positive lens has an aspherical surface. At least one of four lens surfaces of the first and second lenses is an aspherical surface. A prescribed condition is fulfilled.

REFERENCES:
patent: 5724195 (1998-03-01), Enomoto et al.
patent: 5861999 (1999-01-01), Tada
patent: 4-68307 (1992-03-01), None
patent: 2002-72085 (2002-03-01), None

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