Mid-objective laser scanner

Details Mid-objective laser scanner Mid-objective laser scanner

1995-06-07

1998-05-19

Dzierzynski, Paul M.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359207, 359206, 359205, 359210, 347256, 347258, G02B 2608, B41J 247

Patent

active

057543283

ABSTRACT:
A method for correcting astigmatism, bow distortion and field curvature using a Mid-Objective scanner system wherein the system includes a tilted lens or a toric lens for producing an opposite amount of astigmatism to correct astigmatism, a scanning mechanism and a concave cylindrical mirror for directing the scanned beam onto to a workpiece wherein the concave cylindrical mirror has a radius of curvature that corrects the field of curvature in the image plane of the workpiece and thereby enables the scanner system to correct astigmatism, bow distortion and field curvature.

REFERENCES:
patent: 4588269 (1986-05-01), Kessler
patent: 4633272 (1986-12-01), Hardy
patent: 4732459 (1988-03-01), Hayashi
patent: 5168454 (1992-12-01), Laplante et al.
patent: 5255113 (1993-10-01), Yoshikawa et al.
patent: 5255115 (1993-10-01), Kikuchi
patent: 5504613 (1996-04-01), Itabashi et al.
Victor J. Doherty, Eidolon Corporation, entitled, "Correction Scheme for a Post-Objective Optical Scanner", Society of Photo-Optical Instrumentation Engineers, International Lens Design Conference, vol. 554, pp. 247-251 (1985).

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