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

Chi-Hung Lee; Yi Chiu; Han-Ping David Shieh

doi:10.1117/1.3158944

1 July 2009 Astigmatic diffractive optical element for swing-arm-type optical pickup head

Chi-Hung Lee, Yi Chiu, Han-Ping David Shieh

Author Affiliations +

Optical Engineering, Vol. 48, Issue 7, 075201 (July 2009). https://doi.org/10.1117/1.3158944

Abstract

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.

©(2009) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Chi-Hung Lee, Yi Chiu, and Han-Ping David Shieh "Astigmatic diffractive optical element for swing-arm-type optical pickup head," Optical Engineering 48(7), 075201 (1 July 2009). https://doi.org/10.1117/1.3158944

Published: 1 July 2009

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