Super wide-angle lens

Details Super wide-angle lens Super wide-angle lens

2011-08-30

2011-08-30

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Lens

Anamorphic

C359S715000, C359S720000

Reexamination Certificate

active

08009366

ABSTRACT:
A small-sized super wide-angle lens for a solid-state image sensor that is suitable for a digital input apparatus such as a monitoring camera and an onboard camera, which is excellent in terms of optical performance and is low in terms of cost. The super wide-angle lens includes, in order from an object side thereof: a first lens with a negative refractive power; a second lens with a negative refractive power; a third lens with a positive refractive power; and a fourth lens with a positive refractive power. The first lens is a meniscus lens including a convex surface facing the object side. Each of the second lens and the fourth lens includes at lest one rotational-asymmetric surface.

REFERENCES:
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patent: 5905597 (1999-05-01), Mizouchi et al.
patent: 7280289 (2007-10-01), Yamakawa
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patent: 2006-11093 (2006-01-01), None
patent: 2006-011093 (2006-01-01), None
patent: 2006-259704 (2006-09-01), None

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