Accession Number : ADA193227

Title :   Far- and Mid-Infrared Properties of Metal-Insulator Composite Materials.

Descriptive Note : Annual Letter rept. 1 Jan-31 Dec 87,

Corporate Author : PITTSBURGH UNIV PA

Personal Author(s) : Devaty, Robert P

PDF Url : ADA193227

Report Date : Jan 1987

Pagination or Media Count : 18

Abstract : Construction of the far infrared Fourier transform spectrometer was completed so that attention could now be focussed on experiments. Among the highlights are: *SPECAC Interferometer -Design and construction of mylar beamsplitters, which can be used in place of the supplied free-standing wire grids to extend the high frequency cutoff of the instrument from 200/cm to at least 350/cm. -Design and construction of an output focussing mirror to replace the supplied TPX lens. Use of the mirror increases the throughput of the interferometer, especially at high frequencies. -Design and construction of an optical chopper to modulate the Hg arc source for use with lock-in detection. The chopper can be used rather than phase modulation (vibrating the fixed mirror of the interferometer). Both methods have advantages and drawbacks, so it is desirable to have both.

Descriptors :   *COMPOSITE MATERIALS, *INTERFEROMETERS, *INFRARED SPECTROMETERS, BEAM SPLITTING, CONSTRUCTION, DETECTION, FOCUSING, HIGH FREQUENCY, INSULATION, INTERMEDIATE INFRARED RADIATION, METALS, MIRRORS, OUTPUT, PHASE MODULATION, POLYETHYLENE TEREPHTHALATE, POLYMERIC FILMS, THROUGHPUT, FAR INFRARED RADIATION, FOURIER SPECTROMETERS, BISMUTH, PARTICLES, PLASMAS(PHYSICS), RESONANCE, MAGNETIC DIPOLES, ABSORPTION COEFFICIENTS, MIE SCATTERING

Subject Categories : Laminates and Composite Materials
      Optics
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE