Laser astigmatism compensation

Laser astigmatism compensation

In an optical system including a laser diode with astigmatism such that the apparent source position in two orthogonal axes each normal to the beam direction differ, a beam prism expander and a collimating lens positioned between the diode and expander, the collimated lens is positioned relative to...

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1. Verfasser: RENO, CHARLES WILLIAM
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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description In an optical system including a laser diode with astigmatism such that the apparent source position in two orthogonal axes each normal to the beam direction differ, a beam prism expander and a collimating lens positioned between the diode and expander, the collimated lens is positioned relative to the laser such that the radius of curvature of the light beam exiting the beam expander in the two axes is identical.
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subjects INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
title Laser astigmatism compensation
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