Wide-angle lens system

Details Wide-angle lens system Wide-angle lens system

2007-08-26

2008-11-04

Choi, William C (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S715000

Reexamination Certificate

active

07446955

ABSTRACT:
A wide-angle lens system comprises, sequentially from the object side to the image side: a first lens element, a second lens element, a third lens element, an aperture and a fourth lens element. If the field of view of the wide-angle lens system is as high as 140 degrees, the extreme distortion of the image edge can be prevented with only four lens elements, and the image has a high sharpness. Therefore, it is very suitable for use in the monitor and vehicle-related lens system.

REFERENCES:
patent: 5680259 (1997-10-01), Yamada

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