Accession Number : ADD012842

Title :   Pulsed Remote Gauge.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

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

Report Date : 20 May 1986

Pagination or Media Count : 6

Abstract : A method for measuring the separation between two spaced light-reflecting surfaces by means of a single laser pulse. The reflected light is divided into two beams which are then projected at the same angle Theta onto the same area on a photographic film to form interference fringes. The film is developed, placed on a translating platform, and passed through the beam of a CW laser, a portion of the beam being diffracted by the interference fringes recorded on the film. The distance Chi between the high-intensity points of adjacent interference regions is measured and the separation of the two light reflecting surfaces is calculated from the formula (d= Chi) sin Theta. (Patents)

Descriptors :   *PATENTS, *SEPARATION, *REFLECTORS, *REFLECTION, *INTERFERENCE ANALYZERS, *LASER BEAMS, *OPTICAL DETECTORS, INTERFERENCE, PHOTOGRAPHIC FILM, PULSED LASERS, CONTINUOUS WAVE LASERS, LIGHT, SURFACES, LASER APPLICATIONS, HOLOGRAPHY

Subject Categories : Optical Detection and Detectors
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE