F.theta. lens

Details F.theta. lens F.theta. lens

1990-08-28

1992-02-04

Arnold, Bruce Y.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359205, 359215, 359662, G02B 2608, G02B 900

Patent

active

050863509

ABSTRACT:
An f.theta. lens comprises a first lens set having a positive or negative refracting power and a second lens set having a positive refracting power, which are located in that order from the side of a light deflector. The first lens set is composed of two lenses cemented together, and the second lens set is composed of a single lens. They satisfy the conditions

REFERENCES:
patent: 4401362 (1983-08-01), Maeda
patent: 4674825 (1987-06-01), Tateoka et al.
patent: 4787723 (1988-11-01), Uetake

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