OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 3 — Jan. 20, 1999
  • pp: 441–450

Feasibility of an Airborne TV Camera as a Size Spectrometer for Cloud Droplets in Daylight

Howard K. Roscoe, Tom A. Lachlan-Cope, and John Roscoe  »View Author Affiliations


Applied Optics, Vol. 38, Issue 3, pp. 441-450 (1999)
http://dx.doi.org/10.1364/AO.38.000441


View Full Text Article

Acrobat PDF (493 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

Photographs of clouds taken with a camera with a large aperture ratio must have a short depth of focus to resolve small droplets. Hence the sampling volume is small, which limits the number of droplets and gives rise to a large statistical error on the number counted. However, useful signals can be obtained with a small aperture ratio, which allows for a sample volume large enough for counting cloud droplets at aircraft speeds with useful spatial resolution. The signal is sufficient to discriminate against noise from a sunlit cloud as background, provided the bandwidth of the light source and camera are restricted, and against readout noise. Hence, in principle, an instrument to sample the size distribution of cloud droplets from aircraft in daylight can be constructed from a simple TV camera and an array of laser diodes, without any components or screens external to the aircraft window.

© 1999 Optical Society of America

OCIS Codes
(010.3920) Atmospheric and oceanic optics : Meteorology
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(120.4640) Instrumentation, measurement, and metrology : Optical instruments

Citation
Howard K. Roscoe, Tom A. Lachlan-Cope, and John Roscoe, "Feasibility of an Airborne TV Camera as a Size Spectrometer for Cloud Droplets in Daylight," Appl. Opt. 38, 441-450 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-3-441

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited