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Proceedings Paper

80-channel optical recording unit for laser plotter
Author(s): Masahide Okazaki; Takahisa Hayashi; Zenji Wakimoto
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Paper Abstract

This paper explains a new optical recording unit with 80 semiconductor lasers ((lambda) equals 780 nm), and it can be used in the drum rotation type prepress equipment for film exposure. The optical system consists of three units: a unit composed of an off-axis paraboloid mirror and a stereographic projection lens, a both-side telocentric zoom lens unit, and an afocal reduction lens unit. A both side telocentrical optical design has been adopted for each of the units. The stereographic projection lens and the off-axis paraboloid mirror combine to keep the beam intervals regular. As a result, excellent imaging performance and telocentric characteristics at the exposure plane are now available for all magnification ranges.

Paper Details

Date Published: 15 April 1993
PDF: 12 pages
Proc. SPIE 1780, Lens and Optical Systems Design, (15 April 1993); doi: 10.1117/12.142840
Show Author Affiliations
Masahide Okazaki, Dainippon Screen Mfg. Co., Ltd. (Japan)
Takahisa Hayashi, Dainippon Screen Mfg. Co., Ltd. (Japan)
Zenji Wakimoto, Dainippon Screen Mfg. Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 1780:
Lens and Optical Systems Design

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