Accession Number : ADA018333

Title :   Theoretical Investigations of a Tunable Collinear Acousto-Optic Filter.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING

Personal Author(s) : DePriest,C. David

Report Date : MAR 1975

Pagination or Media Count : 137

Abstract : An acousto-optic filter employing collinear interaction of light and sound is analyzed. Relations between the photoelastic tensor, impermeability tensor, and optic and acoustic waves are explored. A method of determining the compatibility of acoustic and optic polarizations and crystal orientation is developed and the results are tabulated. The equations relating birefringence, and acoustic and optic frequencies, as well as those relating acoustic power, crystal length, and wave length, are derived and discussed. The bandwidth relations are discussed and bandwidth over the visual and near IR spectra is predicted for two specific filters. Use of the filter in front of a vidicon to obtain spectral characteristics of visible scenes is investigated. Use in conjunction with a laser and photomultiplier to illuminate and detect distant objects is considered, and computer solutions of maximum object distance are given in graphical form.

Descriptors :   *Tunable lasers, *Tuning devices, *Acoustooptics, *Crystal filters, Computer programs, Light transmission, Dye lasers, Calcium compounds, Lithium compounds, Niobates, Molybdates, Orientation(Direction), Wave propagation, Acoustic waves, Laser modulators, Photoelasticity, Birefringence, Refractive index, Polarization, Laser communications, Bandwidth, Visible spectra, Infrared spectra, Optical communications, Vidicons, Theses, FORTRAN

Subject Categories : Lasers and Masers
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE