Dual wavelength F-theta scan lens

Details Dual wavelength F-theta scan lens Dual wavelength F-theta scan lens

1997-11-26

1999-10-19

Epps, Georgia

Optical: systems and elements

Lens

High distortion lens

359206, G02B 300

Patent

active

059698772

ABSTRACT:
An F-theta scan lens for a dual beam, dual wavelength raster output scanning system (ROS) has four lens elements with the third and fourth lenses forming a doublet having a negative refractive power. This four-element F-theta scan lens corrects for axial chromatic aberration and lateral chromatic aberration for both wavelengths and provides scan linearity.

REFERENCES:
patent: 5111325 (1992-05-01), DeJager
patent: 5404247 (1995-04-01), Cobb et al.
patent: 5550668 (1996-08-01), Appel et al.
patent: 5691835 (1997-11-01), Iizuka
patent: 5835280 (1998-11-01), Griffith

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