Pulsed Remote Gauge.
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
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
- Optical Detection and Detectors
- Test Facilities, Equipment and Methods