Accession Number : ADD011775

Title :   Laser Target Speckle Eliminator.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Scully,C N

Report Date : 16 Apr 1985

Pagination or Media Count : 5

Abstract : An apparatus for eliminating the phenomenon of speckle with regard to laser light reflected from a distant target whose roughness exceeds the wavelength of the laser light. The apparatus includes a half plate wave member, a first polarizing beam splitter member, a totally reflecting right angle prism, and a second polarizing beam splitter member, all of which are in serial optical alignment, that are used in combination to convert a linearly (i.e., vertically) polarized light beam, which is emitted by a laser having a known coherence length, into two coincident, orthogonally polarized, beams that are not coherent with each other, and that have and optical path difference which exceeds the known coherence length of the emitting laser, to eliminate the speckle. (Author)

Descriptors :   *PATENTS, *LASER BEAMS, *LIGHT SCATTERING, LENGTH, COHERENCE, ELIMINATION, LASER TARGET INTERACTIONS, SURFACE ROUGHNESS, POLARIZERS, EMISSION, REFLECTION, PATHS, LASERS, PRISMS(OPTICS), BEAM SPLITTING

Subject Categories : Lasers and Masers
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE