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. 14 figs.
- Inventors:
- Publication Date:
- Research Org.:
- Univ. of California (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 335502
- Patent Number(s):
- US 5,880,461/A/
- Application Number:
- PAN: 8-755,076
- Assignee:
- Univ. of California, Oakland, CA (United States)
- DOE Contract Number:
- AC03-76SF00098
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 9 Mar 1999
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; OPTICAL SYSTEMS; DISPLACEMENT GAGES; DESIGN; PHOTODIODES; USES; HELIUM-NEON LASERS; SENSITIVITY
Citation Formats
Spear, J D. Low noise optical position sensor. United States: N. p., 1999.
Web.
Spear, J D. Low noise optical position sensor. United States.
Spear, J D. 1999.
"Low noise optical position sensor". United States.
@article{osti_335502,
title = {Low noise optical position sensor},
author = {Spear, J D},
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. 14 figs.},
doi = {},
url = {https://www.osti.gov/biblio/335502},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 09 00:00:00 EST 1999},
month = {Tue Mar 09 00:00:00 EST 1999}
}
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