Accession Number : ADD009379

Title :   Pulsed Interferometric Remote Gauge.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Blodgett,Jerry A ; Patten,Raymond A

Report Date : 05 Jan 1982

Pagination or Media Count : 7

Abstract : The invention comprises a method and means for measuring the separation between two optical surfaces. A short-coherence-length laser pulse is projected upon two optical surfaces separated by a distance, d. The reflected, coincident beams are directed into a Michelson interferometer in which one plane mirror is replaced by a stepped mirror. The beams reflected from the two mirrors are directed onto a film where they form interference images. A formula using the number of channels, n, between successive interference fringes and the step width of the stepped mirror is used to calculate d. (Author)

Descriptors :   *Patents, *Michelson interferometers, *Distance measuring equipment, *Pulsed lasers, Optical materials, Interference, Mirrors, Inventions, Images, Surfaces, Width

Subject Categories : Lasers and Masers
      Test Facilities, Equipment and Methods
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE