VISAR: Line-imaging interferometer
A line-imaging Velocity Interferometer System for Any Reflector (VISAR) was applied to measure velocity across the diameter of a metal plate explosively accelerated to 5.5 km/s. Amplified, single- frequency laser light was focused to illuminate a line on the metal surface. The line's image was focused through the interferometer to a streak camera that swept in time and recorded directly on film. During the experiment, the Doppler-shift caused motion of the interference fringes. Analysis of the digitized film record yielded a continuum of time-resolved velocity histories. Velocity gradients across the plate that first swept radially inward, then reflected outward, were clearly measured. Increased power provided by the laser amplifier greatly improved the signal-to-noise ratio compared to our previous line VISAR experiments. 5 refs., 8 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:
- 5638119
- Report Number(s):
- LA-UR-91-1973; CONF-9107105--39; ON: DE91014749
- 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
CAMERAS
DATA ANALYSIS
ELECTROMAGNETIC RADIATION
FIBER OPTICS
IMAGE PROCESSING
IMAGES
IMPACT SHOCK
INTERFEROMETERS
LASER RADIATION
LASERS
LENSES
MEASURING INSTRUMENTS
MEASURING METHODS
OPTICAL PROPERTIES
OPTICS
PERFORMANCE
PHYSICAL PROPERTIES
PROCESSING
RADIATION DETECTORS
RADIATIONS
REFLECTIVITY
SOLID STATE LASERS
STREAK CAMERAS
SURFACE PROPERTIES
VELOCITY