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Proceedings Paper

Optical Performance of Aspheric Singlets for Compact Disc Use
Author(s): Tadashi Kojima; Norikazu Arai
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Paper Abstract

We reported the diffracton-limited plastic aspheric singlet for CD(Compact Disc) use last year,1,2 and it is now under mass-production. We investigated the off-axis performance of bi-aspheric singlets as well as mono-aspheric singlets, and achievable size of image field from a point of view of optical design. In this study, the specifications of singlets are f=4.5mm, 4mm, NA 0.45 and NA 0.6. Optical performance is evaluated by the value of max-imum image field defined by the area of which the rms wave front error is less than 0.07X (Marechal Criterion). The performance of the design results of bi-aspheric singlets and mono-aspheric singlets under several conditions are investigated. From these results, we concluded that bi-aspheric singlets are most suitable for not only CD but also general optical disc use maintaining enough back focal length and image field.

Paper Details

Date Published: 14 February 1986
PDF: 6 pages
Proc. SPIE 0554, 1985 International Lens Design Conference, (14 February 1986);
Show Author Affiliations
Tadashi Kojima, Konishiroku Photo Ind. Co., Ltd. (Japan)
Norikazu Arai, Konishiroku Photo Ind. Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 0554:
1985 International Lens Design Conference
Duncan T. Moore; William H. Taylor, Editor(s)

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