Accession Number:

ADD012842

Title:

Pulsed Remote Gauge.

Descriptive Note:

Patent,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

1986-05-20

Pagination or Media Count:

6.0

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

Subject Categories:

  • Optical Detection and Detectors
  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE