Variability of the Point Spread Function in the water column

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

The Point Spread Function (PSF) is an important property in predicting beam propagation and imaging system performance. An instrument to measure the in situ PSF of ocean water has been built and PSF profiles obtained. This instrument consists of two parts, a flashlamp with cosine emission characteristics, and an imaging solid state camara system. The camera system includes a thermoelectrically cooled CCD array with over 50 dB of dynamic range. This allows the camera to measure the steeply peaked PSF over short (10m) to (80 m) ranges. Measurements of the PSF in three different locations are presented. One location was a coastal station off San Diego where the water column exhibited a well defined shallow (approximately 30 meter) mixed layer with a particulate maximum (defined by a maximum in beam attenuation) at the bottom of this layer. During these measurements the PSF was highly variable with depth, as was to be expected due to the dependence of the PSF on particle concentration and size distribution. In the second example the water column was almost homogeneous (as evidenced in the beam attenuation profiles). Hence, the PSF showed very little dependence on depth. Measurements of the variation of the PSF with range are also presented. A simple relationship of the variation of the PSF with angle and optical path length is presented.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsRichard W. Spinrad
PublisherPubl by Int Soc for Optical Engineering
Pages355-362
Number of pages8
Volume1302
StatePublished - 1990
EventOcean Optics X - Orlando, FL, USA
Duration: Apr 16 1990Apr 18 1990

Other

OtherOcean Optics X
CityOrlando, FL, USA
Period4/16/904/18/90

Fingerprint

Optical transfer function
point spread functions
water
Water
attenuation
Cameras
cameras
profiles
optical paths
Charge coupled devices
Imaging systems
particulates
dynamic range
charge coupled devices
oceans
stations
solid state
Imaging techniques
propagation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Voss, K. (1990). Variability of the Point Spread Function in the water column. In R. W. Spinrad (Ed.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 1302, pp. 355-362). Publ by Int Soc for Optical Engineering.

Variability of the Point Spread Function in the water column. / Voss, Kenneth.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / Richard W. Spinrad. Vol. 1302 Publ by Int Soc for Optical Engineering, 1990. p. 355-362.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Voss, K 1990, Variability of the Point Spread Function in the water column. in RW Spinrad (ed.), Proceedings of SPIE - The International Society for Optical Engineering. vol. 1302, Publ by Int Soc for Optical Engineering, pp. 355-362, Ocean Optics X, Orlando, FL, USA, 4/16/90.
Voss K. Variability of the Point Spread Function in the water column. In Spinrad RW, editor, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 1302. Publ by Int Soc for Optical Engineering. 1990. p. 355-362
Voss, Kenneth. / Variability of the Point Spread Function in the water column. Proceedings of SPIE - The International Society for Optical Engineering. editor / Richard W. Spinrad. Vol. 1302 Publ by Int Soc for Optical Engineering, 1990. pp. 355-362
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