Underwater Optics

Underwater Optics
Author :
Publisher :
Total Pages : 18
Release :
ISBN-10 : UCSD:31822033838426
ISBN-13 :
Rating : 4/5 ( Downloads)

Book Synopsis Underwater Optics by : Seibert Q Duntley

Download or read book Underwater Optics written by Seibert Q Duntley and published by . This book was released on 1966 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: The irradiance pattern was measured for the propagation of a collimated beam of light underwater. A neodymium-doubled green laser was transmitted horizontally at a six foot depth in Lake Winnipesaukee, N.H. The irradiance was measured at distances from 0 to 100 feet and for off-axis angles from 0 to 58 degrees. The water had an attenuation length of 4.54 ft/ln and an absorption coefficient of 0.0446 ln/ft. The ratio of attenuation coefficient to absorption coefficient was 4.94. The fractional power contained within a cone of various angles was computed. At 20 attenuation lengths only 10% of the total power is contained within a cone of 4 degrees whereas at 4 attenuation lengths this same cone contains 50% of the power. (Author).


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