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Proceedings Paper

Optical Pickup For Cd Using No Glass Lens
Author(s): Shinsuke Shikama; Eiichi Toide; Mitsushige Kondo; Kenjiro Kime
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Paper Abstract

An optical pickup for a CD player, which has a simplified optical system, has been developed. It contains only two molded-plastic lenses. One is a plastic aspheric objective for focusing a spot on the disc. The other is a single lens for servo sensor optics. The objective is a finite-conjugate type, and it enables the pickup to be almost the same height(27mm) as our previous model, though the new one has a straight optical path. In this paper, we describe (1) a method to decide the objective specifications considering the relation between the aberration and the readout characteristics, (2) aberration problems using a plastic objective and the compensation method of spherical aberration, and (3) characteristics of the focusing sensor which employs the single plastic lens.

Paper Details

Date Published: 14 January 1987
PDF: 7 pages
Proc. SPIE 0695, Optical Mass Data Storage II, (14 January 1987); doi: 10.1117/12.936838
Show Author Affiliations
Shinsuke Shikama, Mitsubishi Electric Corporation (Japan)
Eiichi Toide, Mitsubishi Electric Corporation (Japan)
Mitsushige Kondo, Mitsubishi Electric Corporation (Japan)
Kenjiro Kime, Mitsubishi Electric Corporation (Japan)

Published in SPIE Proceedings Vol. 0695:
Optical Mass Data Storage II
Robert P. Freese; Albert A. Jamberdino; Maarten R. de Haan, Editor(s)

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