Image-formation optical system, and imaging system...

Details Image-formation optical system, and imaging system... Image-formation optical system, and imaging system...

2007-04-17

2007-04-17

Harrington, Alicia M (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S774000

Reexamination Certificate

active

10838638

ABSTRACT:
The invention relates to an image-formation optical system capable of achieving wide-angle arrangement and compactness at the same time and an imaging system that incorporates the same. The image-formation optical system is made up of, in order from its object side, a first positive lens L1, a second negative lens L2, a third positive lens L3and a fourth positive lens L4. The composite focal length of the first positive lens L1and the second negative lens L2is positive, or the composite focal length of the second negative lens L2, the third positive lens L3and the fourth positive lens L4is negative.

REFERENCES:
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patent: 63-199312 (1988-08-01), None
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patent: 2000-028914 (2000-01-01), None
patent: 2001-281539 (2001-10-01), None

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