Optical Computing, Optical Data Storage

Astigmatic diffractive optical element for swing-arm-type optical pickup head

[+] Author Affiliations
Chi-Hung Lee

National Chiao Tung University,Department of Photonics and Institute of Electro-optical Engineering, No. 1001 Ta Hsueh Road, Hsin-Chu 300, Taiwan

Yi Chiu

National Chiao Tung University,Department of Electrical and Control Engineering, No. 1001 Ta Hsueh Road, Hsin-Chu 300, Taiwan

Han-Ping D. Shieh

National Chiao Tung University,Department of Photonics and Display Institute, No. 1001 Ta Hsueh Road, Hsin-Chu 30010, Taiwan

Opt. Eng. 48(7), 075201 (July 01, 2009). doi:10.1117/1.3158944
History: Received July 23, 2008; Revised May 07, 2009; Accepted May 12, 2009; Published July 01, 2009
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Based on a finite-conjugate objective lens with numerical aperture of 0.62 for a 650-nm wavelength, an optical pickup head composed of a multifunction beamsplitter and a diffractive optical element is designed be used in a swing-arm-type optical pickup head. The diffractive optical element is a lens with an elliptical four-level phase profile to provide both focusing and astigmatism. It is also designed with the goal to simplify the overall optical configuration and provide linear characteristics for the focus error signal.

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© 2009 Society of Photo-Optical Instrumentation Engineers

Citation

Chi-Hung Lee ; Yi Chiu and Han-Ping D. Shieh
"Astigmatic diffractive optical element for swing-arm-type optical pickup head", Opt. Eng. 48(7), 075201 (July 01, 2009). ; http://dx.doi.org/10.1117/1.3158944


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