1 July 2009 Astigmatic diffractive optical element for swing-arm-type optical pickup head
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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.
© (2009) Society of Photo-Optical Instrumentation Engineers (SPIE)
Chi-Hung Lee, Chi-Hung Lee, Yi Chiu, Yi Chiu, Han-Ping David Shieh, 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 . Submission:

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