Accession Number : AD0663271

Title :   VIBRATION ANALYSIS OF HOLOGRAPHIC AND CONVENTIONAL INTERFEROMETRY.

Descriptive Note : Research and development rept. Mar-Apr 67,

Corporate Author : NAVAL ELECTRONICS LAB CENTER FOR COMMAND CONTROL AND COMMUNICATIONS SAN DIEGO CALIF

Personal Author(s) : Monahan,M. A. ; Bromley,K.

Report Date : 08 SEP 1967

Pagination or Media Count : 44

Abstract : Describes two relatively new and useful optical techniques for measuring deformation of surfaces. Verifies results of holographic vibration analysis by comparison of results obtained with modified Twyman-Green interferometer. The hologram has the advantage of providing contour map of vibration amplitude of entire surface for particular frequency and drive, whereas more conventional techniques can be used to investigate only one point on surface at a time. Neither method requires attachment of sensors to surface being measured, and both may be applied to surfaces submerged in transparent liquids. (Author)

Descriptors :   (*VIBRATION, OPTICAL ANALYSIS), (*LASERS, INTERFEROMETERS), (*PHOTOGRAPHY, VIBRATION), DEFORMATION, MEASUREMENT, OPTICAL IMAGES, TRANSDUCERS, GEOMETRY, PHOTOGRAPHIC PLATES, MONOCHROMATIC LIGHT, PHOTOGRAPHIC EMULSIONS, MATHEMATICAL ANALYSIS, THEORY, OPTICAL EQUIPMENT, ILLUMINATION, RESOLUTION, LIGHT, ELECTROMAGNETISM

Subject Categories : Lasers and Masers
      Holography
      Optics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE