Ultra-wide angle F-.theta. lens system

Details Ultra-wide angle F-.theta. lens system Ultra-wide angle F-.theta. lens system

1986-10-15

1988-11-29

Corbin, John K.

350 68, G02B 914, G02B 2610

Patent

active

047877235

ABSTRACT:
An ultra-wide angle f-.theta. lens system comprising, in the order from the light beam deflector side, a first lens component having positive power, a second lens component having negative power, and a third lens component having positive power, the ultra-wide angle f-.theta. lens system being arranged to have an ultra-wide scanning angle widened to .+-.45.degree. and exhibiting an imaging performance of laser beam waist close to the diffraction limit in spite of the fact that the f-.theta. lens system comprises a small number of lenses.

REFERENCES:
patent: 4401362 (1983-08-01), Maeda

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