f-.theta. Lens system

Details f-.theta. Lens system f-.theta. Lens system

1981-07-13

1983-08-30

Corbin, John K.

350475, G02B 914, G02B 2717

Patent

active

044013620

ABSTRACT:
An f-.theta. lens system comprising the first lens element which is a positive lens, the second lens element which is a negative lens and the third lens element which is a positive lens. This lens system can be formed as a small lens of a wide angle and has a focusing ability close to the diffraction limit.

REFERENCES:
patent: 4179183 (1979-12-01), Tatcoka et al.
patent: 4258981 (1981-03-01), Goto
patent: 4269478 (1981-05-01), Maeda et al.
patent: 4277128 (1981-07-01), Kawamura

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