Spherical aberration compensation by wavelength
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United States of America Patent
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Apr 24, 2007
Grant Date -
May 20, 2004
app pub date -
May 27, 2003
filing date -
Nov 15, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for minimizing spherical aberration in an optical read/write drive caused by variances in lens thickness and laser wavelength. The method provides an economic solution that pairs objective lenses with laser diodes such that the spherical aberration caused by the objective lens is offset by the spherical aberration caused by the laser wavelength, thereby minimizing or completely canceling the overall spherical aberration.
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