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Optical Engineering

Spot size and depth of focus in optical data storage system
Author(s): Haifeng Wang; Gaoqiang Yuan; Weilian Tan; Luping Shi; Chong Tow Chong
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Paper Abstract

Different definitions of spot size and depth of focus in optical data storage systems are analyzed and compared numerically. It appears that the differences between the definitions become more significant as the numerical aperture of the optical system increases. The relationship between spherical aberration and axial intensity is studied, and a general definition of the depth of focus based on this analysis is proposed.

Paper Details

Date Published: 1 June 2007
PDF: 3 pages
Opt. Eng. 46(6) 065201 doi: 10.1117/1.2744063
Published in: Optical Engineering Volume 46, Issue 6
Show Author Affiliations
Haifeng Wang, Data Storage Institute (Singapore)
Gaoqiang Yuan, National Univ. of Singapore (Singapore)
Weilian Tan, Data Storage Institute (Singapore)
Luping Shi, National Univ. of Singapore (Singapore)
Chong Tow Chong, National Univ. of Singapore (Singapore)

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