Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1997-11-07
1999-03-30
Edun, Muhammad N.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 4411, G11B 700
Patent
active
058897500
ABSTRACT:
A system for adjusting the spot size of an optical recording system includes a variable magnification lens assembly for adjusting the beam size while obtaining feedback of the actual beam size through an image device. The variable magnification lens assembly includes a beam expander with manual or motor-driven actuators for positioning a beam sizing lens while viewing an image of the spot. An acousto-optic modulator may be combined with the spot sizing function to reduce the number of lenses. The image device may include a charge coupled device camera connected to an image viewer or to a computer having image processing software. An operator may adjust the spot size while viewing an image of the spot, or the computer may control the beam size motors according to the measurement of the spot size.
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Hamersley Alan
Summers G. Clayton
Cinram Inc.
Edun Muhammad N.
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