Optical Pickup For Cd Using No Glass Lens

Shinsuke Shikama; Eiichi Toide; Mitsushige Kondo; Kenjiro Kime

doi:10.1117/12.936838

14 January 1987 Optical Pickup For Cd Using No Glass Lens

Shinsuke Shikama, Eiichi Toide, Mitsushige Kondo, Kenjiro Kime

Proceedings Volume 0695, Optical Mass Data Storage II; (1987) https://doi.org/10.1117/12.936838
Event: 30th Annual Technical Symposium, 1986, San Diego, United States

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.

Citation Download Citation

Shinsuke Shikama, Eiichi Toide, Mitsushige Kondo, and Kenjiro Kime "Optical Pickup For Cd Using No Glass Lens", Proc. SPIE 0695, Optical Mass Data Storage II, (14 January 1987); https://doi.org/10.1117/12.936838

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