Ambient Light Calibration of a Scanning Slope Sensor

This paper outlines a procedure developed to calibrate a laser-based water surface slope sensor against ambient light variations. An analysis of the optical position sensor used in the system indicates how variations in the ambient light intensity cause shifts in the illumination pattern centroid ca...

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Bibliographic Details
Main Authors: Sletten, Mark A., Trizna, Dennis B., Hwang, Paul A.
Other Authors: NAVAL RESEARCH LAB WASHINGTON DC
Format: Text
Language:English
Published: 1995
Subjects:
Physical and Dynamic Oceanography
Lasers and Masers
Optical Detection and Detectors
*OCEAN SURFACE
*LASER APPLICATIONS
*OPTICAL DETECTORS
*OPTICAL SCANNING
POSITION(LOCATION)
WATER
INTENSITY
LIGHT
ELECTRONIC EQUIPMENT
ILLUMINATION
SURFACES
SLOPE
CALIBRATION
NORTH ATLANTIC OCEAN
SCANNERS
AMBIENT LIGHT
PE61153N
WU53-3620-5A
North Atlantic
Online Access:http://www.dtic.mil/docs/citations/ADA295413
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA295413
Description
Summary:This paper outlines a procedure developed to calibrate a laser-based water surface slope sensor against ambient light variations. An analysis of the optical position sensor used in the system indicates how variations in the ambient light intensity cause shifts in the illumination pattern centroid calculated by the sensor electronics. These shifts are misinterpreted as slope variations of the water surface unless special calibration measures are performed. The analysis is also used to illustrate a technique to compensate for this effect. The analysis is validated using laboratory and field data, and the calibration technique is then applied to data recently collected in the North Atlantic during the joint ONR/NRL HIRES program. Prepared in collaboration with QUEST Integrated, Inc., Kent, WA.

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