Wide-angle lens assembly and method

Details Wide-angle lens assembly and method Wide-angle lens assembly and method

1997-09-29

2000-01-25

Sugarman, Scott J.

Optical: systems and elements

Lens

Reverse telephoto

359716, 359717, 359784, 359793, G02B 1304

Patent

active

060184256

ABSTRACT:
A low-cost wide-angle lens assembly being comprised of a decreased number of lenses yet capable of properly correcting optical aberrations. The second lens in each lens group from the minimum to the maximum horizontal viewing angle is commonly used, and the first lens in each lens group from a reference angle to the maximum horizontal viewing angle is commonly used, thus reducing the total number of required lenses. Aberrations are favorably corrected by satisfying predetermined conditions as to focal distances and back focuses of the lenses.

REFERENCES:
patent: 4413888 (1983-11-01), Sato
patent: 5268792 (1993-12-01), Kreitzer
patent: 5473473 (1995-12-01), Estelle
patent: 5485313 (1996-01-01), Betensky
patent: 5646777 (1997-07-01), Ohshita

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