Simple approach to CCD camera calibration for optical diagnostics instrumentation

Soyoung Stephen Cha; Fred W. Leslie; Narayanan Ramachandran

doi:10.1117/12.449381

26 November 2001 Simple approach to CCD camera calibration for optical diagnostics instrumentation

Soyoung Stephen Cha, Fred W. Leslie, Narayanan Ramachandran

Proceedings Volume 4448, Optical Diagnostics for Fluids, Solids, and Combustion; (2001) https://doi.org/10.1117/12.449381
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

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.

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Soyoung Stephen Cha, Fred W. Leslie, and Narayanan Ramachandran "Simple approach to CCD camera calibration for optical diagnostics instrumentation", Proc. SPIE 4448, Optical Diagnostics for Fluids, Solids, and Combustion, (26 November 2001); https://doi.org/10.1117/12.449381

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KEYWORDS

Calibration

CCD cameras

Optical diagnostics

Sensors

Optical calibration

Combustion

Interferometry

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