Full-field Fabry-Perot interferometer
This paper describes the use of a Fabry-Perot interferometer for simultaneously measuring velocity at many points on the surface of a shock-loaded solid. The method is based upon work reported by S. Gidon and G. Behar in 1986, but the data analysis has been improved by the application of image-processing techniques. Light from a pulsed single-frequency laser is focused onto a moving target and the returned Doppler-shifted image passed through a Fabry-Perot interferometer. Output of the interferometer is a set of fringes that are formed for specific combinations of wavelength and light angle. These fringes are recorded on film for subsequent analysis. Fringe position determines the velocity for each point on the target that forms a fringe. A method for determining the velocity as a function of both position and time will also be discussed. 5 refs., 6 figs.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5544147
- Report Number(s):
- LA-UR-91-2020; CONF-9107105--42; ON: DE91014610
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420200 -- Engineering-- Facilities
Equipment
& Techniques
440600* -- Optical Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
ACCELERATION
DATA ANALYSIS
DOPPLER EFFECT
ELECTROMAGNETIC RADIATION
FABRY-PEROT INTERFEROMETER
FOCUSING
IMAGE PROCESSING
IMAGES
IMPACT SHOCK
INTERFEROMETERS
LASER RADIATION
LASERS
MEASURING INSTRUMENTS
MEASURING METHODS
NEODYMIUM LASERS
OPTICAL PROPERTIES
PERFORMANCE TESTING
PHOTOGRAPHY
PHYSICAL PROPERTIES
PROCESSING
RADIATIONS
REFLECTIVITY
SHOCK WAVES
SOLID STATE LASERS
SURFACE PROPERTIES
TESTING
VELOCITY