System for photometric calibration of optoelectronic imaging devices especially streak cameras
Abstract
A system for the photometric calibration of streak cameras and similar imaging devices provides a precise knowledge of the camera's flat-field response as well as a mapping of the geometric distortions. The system provides the flat-field response, representing the spatial variations in the sensitivity of the recorded output, with a signal-to-noise ratio (SNR) greater than can be achieved in a single submicrosecond streak record. The measurement of the flat-field response is carried out by illuminating the input slit of the streak camera with a signal that is uniform in space and constant in time. This signal is generated by passing a continuous wave source through an optical homogenizer made up of a light pipe or pipes in which the illumination typically makes several bounces before exiting as a spatially uniform source field. The rectangular cross-section of the homogenizer is matched to the usable photocathode area of the streak tube. The flat-field data set is obtained by using a slow streak ramp that may have a period from one millisecond (ms) to ten seconds (s), but may be nominally one second in duration. The system also provides a mapping of the geometric distortions, by spatially and temporarily modulating the output ofmore »
- Inventors:
- Issue Date:
- Research Org.:
- University Of Rochester, Rochester, NY (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1174562
- Patent Number(s):
- 6642499
- Application Number:
- 09/356,932
- Assignee:
- University Of Rochester
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01J - MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED, VISIBLE OR ULTRA-VIOLET LIGHT
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- DOE Contract Number:
- FC03-92SF19460
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION
Citation Formats
Boni, Robert, and Jaanimagi, Paul. System for photometric calibration of optoelectronic imaging devices especially streak cameras. United States: N. p., 2003.
Web.
Boni, Robert, & Jaanimagi, Paul. System for photometric calibration of optoelectronic imaging devices especially streak cameras. United States.
Boni, Robert, and Jaanimagi, Paul. Tue .
"System for photometric calibration of optoelectronic imaging devices especially streak cameras". United States. https://www.osti.gov/servlets/purl/1174562.
@article{osti_1174562,
title = {System for photometric calibration of optoelectronic imaging devices especially streak cameras},
author = {Boni, Robert and Jaanimagi, Paul},
abstractNote = {A system for the photometric calibration of streak cameras and similar imaging devices provides a precise knowledge of the camera's flat-field response as well as a mapping of the geometric distortions. The system provides the flat-field response, representing the spatial variations in the sensitivity of the recorded output, with a signal-to-noise ratio (SNR) greater than can be achieved in a single submicrosecond streak record. The measurement of the flat-field response is carried out by illuminating the input slit of the streak camera with a signal that is uniform in space and constant in time. This signal is generated by passing a continuous wave source through an optical homogenizer made up of a light pipe or pipes in which the illumination typically makes several bounces before exiting as a spatially uniform source field. The rectangular cross-section of the homogenizer is matched to the usable photocathode area of the streak tube. The flat-field data set is obtained by using a slow streak ramp that may have a period from one millisecond (ms) to ten seconds (s), but may be nominally one second in duration. The system also provides a mapping of the geometric distortions, by spatially and temporarily modulating the output of the homogenizer and obtaining a data set using the slow streak ramps. All data sets are acquired using a CCD camera and stored on a computer, which is used to calculate all relevant corrections to the signal data sets. The signal and flat-field data sets are both corrected for geometric distortions prior to applying the flat-field correction. Absolute photometric calibration is obtained by measuring the output fluence of the homogenizer with a "standard-traceable" meter and relating that to the CCD pixel values for a self-corrected flat-field data set.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 04 00:00:00 EST 2003},
month = {Tue Nov 04 00:00:00 EST 2003}
}
Works referenced in this record:
Flat-Field Response And Geometric Distortion Measurements Of Optical Streak Cameras
conference, February 1988
- Montgomery, D. S.; Drake, R. P.; Jones, B. A.
- 31st Annual Technical Symposium, SPIE Proceedings