&lt;title&gt;Hybrid optical elements for dual-focus pickup&lt;/title&gt;

Der-Chin Su; Jen-Tsorng Chang; Yang-Tung Huang

doi:10.1117/12.279451

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<title>Hybrid optical elements for dual-focus pickup</title>

Der-Chin Su Jen-Tsorng Chang Yang-Tung Huang

Year: 1997 Journal: Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE Vol: 3159 Pages: 269-274 Publisher: SPIE

DOI: 10.1117/12.279451

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Abstract

Two hybrid optical elements re presented for dual-focus pickup in the digital versatile disk (DVD) system. One is a hybrid dual-focus lens and the other is a holographic regional mirror. The optical head consisting of these two hybrid optical elements can read the information recorded on two layers of DVD simultaneously. Its specifications are described. The fabrication parameters of these two hybrid optical elements are derived.

Keywords:

Focus (optics) Holography Optical disc Pickup Lens (geology) Dual (grammatical number) Fabrication Computer science Optics Physics Artificial intelligence Image (mathematics) Art

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Phase-change materials and chalcogenides

Physical Sciences → Materials Science → Materials Chemistry

Photorefractive and Nonlinear Optics

Physical Sciences → Physics and Astronomy → Atomic and Molecular Physics, and Optics

Semiconductor Lasers and Optical Devices

Physical Sciences → Engineering → Electrical and Electronic Engineering

<title>Hybrid optical elements for dual-focus pickup</title>

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