Laser scanner

Details Laser scanner Laser scanner

1992-08-07

1993-12-14

Arnold, Bruce Y.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359216, 359718, G02B 2608

Patent

active

052708500

ABSTRACT:
A laser scanner which includes a rotary polyhedral mirror for scanning a light beam from a laser light source, and an F.theta. lens system which includes first and second lenses through which the light beam is radiated onto a scanning plane. The first lens of the F.theta. lens system is provided on the rotary polyhedral mirror side and is constructed with a joined lens, to increase the degree of design of the first lens. This design freedom for the F.theta. lens system improves the F.theta. characteristic (i.e., characteristic of displacement on a scanning plane), the field curvature characteristic (i.e., characteristic of image defocusing on the scanning plane) and similar problems.

REFERENCES:
patent: 4179183 (1979-12-01), Tateoka et al.
patent: 4963900 (1990-10-01), Budd et al.
patent: 5086350 (1992-02-01), Nishihata
patent: 5111325 (1992-05-01), DeJager
"Laser Scanning System Using a Rotationally Asymmetric Aspheric Surface", Akira Arimoto, Susumu Saitoh, Shigeo Moriyama, Yoshimasa Kondou, and Takeshi Mochizuki, Applied Optics, 20, Feb. 1991, vol. 30, No. 6. pp. 699-704.
German Search Report, Jan. 27, 1993.

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