Design and evaluation of a Blu-ray pickup head system for determining the tilt angle and displacement of the test plane

Wen Shing Sun, Chuen Lin Tien, Te Yuan Chung, Yan Nan Lin, Ju Yi Lee, Dung Yi Hsieh, Tsai Wei Lin

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We present an optical system design for determining the tilt angle and displacement of the test plane. The proposed optical system consists of a Blu-ray pickup head and a pigtailed laser diode with a uniform Gaussian beam. The optical system is evaluated by two optical design software packages, Code V and LightTools. A quadrant detector is used to detect the relative relationship of the VA, VB, VC and VD output signals, which can be used to measure the tilt angle and displacement on the test plane. Both the tilt angle and displacement on the test plane can be determined from the change in the beam shape on the quadrant detector. The proposed system can generate a circular uniform beam shape to reduce the misjudgment and to enhance the measurement accuracy. Various simulation cases are presented in detail to show the feasibility of the proposed system.

Original languageEnglish
Pages (from-to)1076-1088
Number of pages13
JournalOptics and Lasers in Engineering
Volume49
Issue number8
DOIs
StatePublished - Aug 2011

Keywords

  • Blu-ray pickup head
  • Normalized focus error signal
  • Optical system design
  • Pigtailed laser diode

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