Light beam scanning apparatus and the method

Details Light beam scanning apparatus and the method Light beam scanning apparatus and the method

1982-08-06

1984-08-07

Corbin, John K.

350 68, G02B 2717

Patent

active

044640110

ABSTRACT:
A light beam scanning apparatus projects a light beam swept by a light scanner to a spherical mirror and scans by a light beam spot reflected and focused by the spherical mirror a surface of an object arranged to oppose to the spherical mirror at a position spaced from the spherical mirror by a distance equal to a focal distance f of the spherical mirror. An optical path length between the light scanner and the spherical mirror is set to 0.78 f-0.84 f to minimize a curvature of field (circle of confusion).

REFERENCES:
patent: 4196961 (1980-04-01), Walter et al.

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