F.theta. single lens

Details F.theta. single lens F.theta. single lens

1982-07-01

1987-09-22

Corbin, John K.

350410, G02B 300

Patent

active

046951326

ABSTRACT:
An F.theta. lens is provided for focusing a laser beam, which is deflected at a constant angular speed, onto a surface being scanned in a manner such that the focused spots moves across the surface being scanned at a constant speed and linearly. The lens is formed by a single meniscus lens having a positive power and having its concave side directed toward an object.

REFERENCES:
patent: 1658365 (1928-02-01), Altman
patent: 2398276 (1946-04-01), Altman
patent: 4571035 (1986-02-01), Sakuma

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