Wide angle lens

Details Wide angle lens Wide angle lens

1994-04-05

1996-09-17

Nelms, David C.

Optical: systems and elements

Lens

Multiple component lenses

359752, 359793, G02B 962

Patent

active

055574734

ABSTRACT:
A wide angle lens includes, in turn from the object side, a first lens group having a negative refracting power, and a second lens group having a positive refracting power. The first lens group includes, in turn from the object side, a first lens component having a positive refracting power, and a second lens component having a negative refracting power. The second lens group includes, in turn from the object side, a third lens component having a positive refracting power, a fourth lens component having a negative refracting power, a fifth lens component having a positive refracting power, and a sixth lens component having a positive refracting power. The lens satisfies the following conditions:

REFERENCES:
patent: 3955883 (1976-11-01), Sugiyama
patent: 4008952 (1977-02-01), Nakagawa
patent: 4099850 (1978-07-01), Matsui
patent: 4221467 (1980-09-01), Imai
patent: 4333714 (1982-06-01), Kreitzer
patent: 4352544 (1982-10-01), Imai
patent: 5042929 (1991-08-01), Tanaka

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