Registers – Coded record sensors – Particular sensor structure
Patent
1993-02-01
1994-12-06
Nelms, David C.
Registers
Coded record sensors
Particular sensor structure
235467, H01V 314
Patent
active
053713613
ABSTRACT:
A method and apparatus for holding an otherwise variable parameter in a scanner approximately constant over a desired scan volume to improve the ability to compensate for unwanted variations in the amplitude modulation depth of a signal is provided, the signal being determined from collected light reflected from a target. In one embodiment, the time domain impulse response of the opto-mechanical system is the parameter which is held approximately constant by appropriately positioning the beam waist so that the beam spot size diverges approximately linearly along the beam axis within the scan volume.
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Arends Thomas C.
Colley James E.
Loris Blaine F.
Peterson Donald S.
Ring James W.
Nelms David C.
Spectra-Physics Scanning Systems, Inc.
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