Optical scanner

Details Optical scanner Optical scanner

1996-11-06

1998-07-14

Dzierzynski, Paul M.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359207, 359215, 347259, G02B 2608

Patent

active

057813230

ABSTRACT:
An optical scanner for use in laser beam printers and the like which is particularly satisfactory in imaging characteristics. A light beam from a semiconductor laser passes through a collimator lens, an aperture diaphragm and a cylindrical lens. The beam is then deflected by a rotating lens mirror and subjected to the focusing action of an imaging lens so that it is focused to form a beam spot, which scans over a scan surface as the beam is deflected. The imaging lens has aspheric surfaces in the main-scanning cross section and is designed so that the rate of change in its curvature and other relevant parameters satisfy a predetermined equation so as to lie within a predetermined range.

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Applied Optics, vol. 30, No. 6, Feb. 20, 1991, pp. 699-704. Arimoto et al., "Laser Scanning System Using a Rotationally Asymmetric Aspheric Surface".

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