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Proceedings Paper

Simple approach to CCD camera calibration for optical diagnostics instrumentation
Author(s): Soyoung Stephen Cha; Fred W. Leslie; Narayanan Ramachandran
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Paper Abstract

Solid State array sensors are ubiquitous nowadays for obtaining gross field images in numerous scientific and engineering applications including optical diagnostics and instrumentation. Linear responses of these sensors are often required as in interferometry, light scattering and attenuation measurements, and photometry. In most applications, the linearity is usually taken to be granted without thorough quantitative assessment or correction through calibration. Upper-grade CCD cameras of high price may offer better linearity: however, they also require linearity checking and correction if necessary. Intermediate- or low-grade CCD cameras are likely to need calibration for achieving linearity. Here, we present two very simple approaches: one for quickly checking camera linearity without any additional setup and the other for precisely correcting nonlinear sensor responses. It is believed that after calibration, those sensors of intermediate or low grade can function as effectively as their expensive counterparts.

Paper Details

Date Published: 26 November 2001
PDF: 10 pages
Proc. SPIE 4448, Optical Diagnostics for Fluids, Solids, and Combustion, (26 November 2001); doi: 10.1117/12.449381
Show Author Affiliations
Soyoung Stephen Cha, Univ. of Illinois/Chicago (United States)
Fred W. Leslie, NASA Marshall Space Flight Ctr. (United States)
Narayanan Ramachandran, Universities Space Research Association and NASA Marshall Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 4448:
Optical Diagnostics for Fluids, Solids, and Combustion
Carolyn R. Mercer; Soyoung Stephen Cha; Gongxin Shen, Editor(s)

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