Lens system, and objective lens system and optical...

Details Lens system, and objective lens system and optical... Lens system, and objective lens system and optical...

2006-06-27

2006-06-27

Spector, David N. (Department: 2873)

Optical: systems and elements

Lens

With field curvature shaping

C359S015000

Reexamination Certificate

active

07068437

ABSTRACT:
A lens system which compensates for various aberrations, including chromatic aberration, with an enlarged field-of-view. The lens system includes a positive element and a negative element, each positioned in an optical path of incident light. The positive element includes a first negative lens, a convex lens and a hologram optical element. The negative element includes a second negative lens.

REFERENCES:
patent: 4300817 (1981-11-01), Betensky
patent: 4776681 (1988-10-01), Moskovich
patent: 6275342 (2001-08-01), Sakamoto et al.

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