Flat-field response and geometric distortion measurements of optical streak cameras
Conference
·
OSTI ID:5859650
To accurately measure pulse amplitude, shape, and relative time histories of optical signals with an optical streak camera, it is necessary to correct each recorded image for spatially-dependent gain nonuniformity and geometric distortion. Gain nonuniformities arise from sensitivity variations in the streak-tube photocathode, phosphor screen, image-intensifier tube, and image recording system. These nonuniformities may be severe, and have been observed to be on the order of 100% for some LLNL optical streak cameras. Geometric distortion due to optical couplings, electron-optics, and sweep nonlinearity not only affects pulse position and timing measurements, but affects pulse amplitude and shape measurements as well. By using a 1.053-..mu..m, long-pulse, high-power laser to generate a spatially and temporally uniform source as input to the streak camera, the combined effects of flat-field response and geometric distortion can be measured under the normal dynamic operation of cameras with S-1 photocathodes. Additionally, by using the same laser system to generate a train of short pulses that can be spatially modulated at the input of the streak camera, we can effectively create a two-dimensional grid of equally-spaced pulses. This allows a dynamic measurement of the geometric distortion of the streak camera. We will discuss the techniques involved in performing these calibrations, will present some of the measured results for LLNL optical streak cameras, and will discuss software methods to correct for these effects. 6 refs., 6 figs.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5859650
- Report Number(s):
- UCRL-96565; CONF-8708110-28; ON: DE88002394
- Country of Publication:
- United States
- Language:
- English
Similar Records
System for photometric calibration of optoelectronic imaging devices especially streak cameras
Performance characterization of an image converter based streak camera
The effects of variations in the photocathode voltages of electronic streak cameras
Patent
·
Mon Nov 03 23:00:00 EST 2003
·
OSTI ID:1174562
Performance characterization of an image converter based streak camera
Conference
·
Tue Aug 20 00:00:00 EDT 1985
·
OSTI ID:5024405
The effects of variations in the photocathode voltages of electronic streak cameras
Conference
·
Mon Aug 08 00:00:00 EDT 1988
·
OSTI ID:6588966
Related Subjects
440300* -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700208 -- Fusion Power Plant Technology-- Inertial Confinement Technology
CALIBRATION
CAMERAS
IMAGE PROCESSING
MEASURING INSTRUMENTS
PROCESSING
RADIATION DETECTORS
RESOLUTION
SIGNAL DISTORTION
SPATIAL RESOLUTION
STREAK CAMERAS
TIME RESOLUTION
TIMING PROPERTIES
47 OTHER INSTRUMENTATION
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700208 -- Fusion Power Plant Technology-- Inertial Confinement Technology
CALIBRATION
CAMERAS
IMAGE PROCESSING
MEASURING INSTRUMENTS
PROCESSING
RADIATION DETECTORS
RESOLUTION
SIGNAL DISTORTION
SPATIAL RESOLUTION
STREAK CAMERAS
TIME RESOLUTION
TIMING PROPERTIES