Low noise optical position sensor
Abstract
A novel optical position sensor is described that uses two component photodiodes electrically connected in parallel, with opposing polarities. A lens provides optical gain and restricts the acceptance angle of the detector. The response of the device to displacements of an optical spot is similar to that of a conventional bi-cell type position sensitive detector. However, the component photodiode design enables simpler electronic amplification with inherently less electrical noise than the bi-cell. Measurements by the sensor of the pointing noise of a focused helium-neon laser as a function of frequency demonstrate high sensitivity and suitability for optical probe beam deflection experiments.
- Inventors:
-
- Berkeley, CA
- Issue Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- OSTI Identifier:
- 872182
- Patent Number(s):
- 5880461
- Assignee:
- Regents of University of California (Oakland, CA)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01J - MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT
G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
- DOE Contract Number:
- AC03-76SF00098
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- noise; optical; position; sensor; novel; described; component; photodiodes; electrically; connected; parallel; opposing; polarities; lens; provides; restricts; acceptance; angle; detector; response; device; displacements; spot; similar; conventional; bi-cell; type; sensitive; photodiode; design; enables; simpler; electronic; amplification; inherently; electrical; measurements; focused; helium-neon; laser; function; frequency; demonstrate; sensitivity; suitability; probe; beam; deflection; experiments; position sensor; probe beam; electrically connected; position sensitive; optical probe; sensitive detector; acceptance angle; electrical noise; provides optical; novel optical; opposing polarities; optical position; noise optical; cell type; beam deflection; /250/396/
Citation Formats
Spear, Jonathan David. Low noise optical position sensor. United States: N. p., 1999.
Web.
Spear, Jonathan David. Low noise optical position sensor. United States.
Spear, Jonathan David. Fri .
"Low noise optical position sensor". United States. https://www.osti.gov/servlets/purl/872182.
@article{osti_872182,
title = {Low noise optical position sensor},
author = {Spear, Jonathan David},
abstractNote = {A novel optical position sensor is described that uses two component photodiodes electrically connected in parallel, with opposing polarities. A lens provides optical gain and restricts the acceptance angle of the detector. The response of the device to displacements of an optical spot is similar to that of a conventional bi-cell type position sensitive detector. However, the component photodiode design enables simpler electronic amplification with inherently less electrical noise than the bi-cell. Measurements by the sensor of the pointing noise of a focused helium-neon laser as a function of frequency demonstrate high sensitivity and suitability for optical probe beam deflection experiments.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1999},
month = {Fri Jan 01 00:00:00 EST 1999}
}
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