Line-imaging Fabry-Perot interferometer
A method for measuring the velocity history of a line element on a shock-loaded solid has been demonstrated. Light from single-frequency laser is focused through a cylindrical lens to a line on a moving target. The return Doppler-shifted image is passed through a Fabry-Perot interferometer. Because only specific combinations of incident light angle and frequency can pass through the interferometer the output is an incomplete image of the moving target appearing as a set of fringes. This image is focused onto an electronic streak camera and swept in time. The fringe pattern changes with time as the target surface moves, allowing determination of velocity for each point on the target that forms a fringe. Because the velocity can only be measured at the fringe positions, it is necessary to use an interpolating polynomial to obtain a continuous function of time and velocity along the sampled lien. 9 refs., 7 figs.
- Research Organization:
- Los Alamos National Lab., NM (USA)
- Sponsoring Organization:
- DOE/DP
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6777701
- Report Number(s):
- LA-UR-90-1999; CONF-900756--10; ON: DE90013175
- Country of Publication:
- United States
- Language:
- English
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The VELOPT code for estimating performance of a Fabry-Perot velocimeter
The VELOPT code for estimating performance of a Fabry-Perot velocimeter
Related Subjects
426002 -- Engineering-- Lasers & Masers-- (1990-)
440600* -- Optical Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
CAMERAS
COMPUTER GRAPHICS
DOPPLER EFFECT
FABRY-PEROT INTERFEROMETER
FOCUSING
IMAGE PROCESSING
IMPACT SHOCK
INTERFEROMETERS
INTERPOLATION
LASERS
LENSES
MAPS
MEASURING INSTRUMENTS
MEASURING METHODS
MIRRORS
NUMERICAL SOLUTION
PERFORMANCE
PROCESSING
SURFACE PROPERTIES
TARGETS
VELOCITY
WAVELENGTHS