Off-Axis Astigmatic Reflector for Compact Optical Pickup

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概要

• 論文の詳細を見る

• The request on miniaturization of optical pickup has invoked the development of several new architectures and relevant optical components. The optical pickup mostly composed of reflective optical components tends to have the smallest form factor due to the forward and backward light path being folded and restricted within a common space. The optical component for the quadratic detector to generate focal error signal (FES) should also be reflective type and has to work in off-axis fashion. The parameters which influence the performance of the off-axis astigmatic reflector at finite conjugate has been investigated and a systematic design procedure based on optimizing an off-axis portion of a biconic surface has been developed. The design example shows normalized FES curve with sufficient linearity and sensitivity for the detection of disc deviation within the range of $\pm 1$ μm for the pickup working at 405 nm.

• 2009-03-25

著者

• Chen Cheng-huan

  Department Of Power Mechanical Engineering National Tsing Hua University

• Su Ya-Ni

  Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, R.O.C.

• Yang Cian-Li

  Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, R.O.C.

関連論文

• Off-Axis Astigmatic Reflector for Compact Optical Pickup
• Enlarging Lens Design with F-θ Lens for Real Time Laser Lithography Inspections
• Development of a Double-Sided Micro Lens Array for Micro Laser Projector Application

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