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Applied Optics

Applied Optics


  • Vol. 40, Iss. 7 — Mar. 1, 2001
  • pp: 1065–1073

Calculation of focal positions in an optical head for parallel data processing with a monolithic four-beam laser diode

Masahisa Shinoda  »View Author Affiliations

Applied Optics, Vol. 40, Issue 7, pp. 1065-1073 (2001)

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A method for calculating focal positions in a multibeam optical head by use of a multibeam laser diode, in which conditions for misalignment of the light source are taken into consideration, is introduced. One calculates the focal positions by using the practical characteristics of a monolithic four-beam laser diode and the practical specifications of the optics in an optical head. The results show that each focal position is defocused mainly as a result of curvature of the fields of the lenses. The adaptability of focal positions for various calculated conditions is discussed from the standpoint of depth of focus.

© 2001 Optical Society of America

OCIS Codes
(080.3630) Geometric optics : Lenses
(140.2010) Lasers and laser optics : Diode laser arrays
(210.0210) Optical data storage : Optical data storage
(210.4770) Optical data storage : Optical recording
(220.2740) Optical design and fabrication : Geometric optical design
(220.4830) Optical design and fabrication : Systems design

Original Manuscript: March 6, 2000
Revised Manuscript: July 3, 2000
Published: March 1, 2001

Masahisa Shinoda, "Calculation of focal positions in an optical head for parallel data processing with a monolithic four-beam laser diode," Appl. Opt. 40, 1065-1073 (2001)

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