Abstract

Studies on photoelasticity have been conducted by many researchers in recent years, and many equations for photoelastic analysis based on digital images were proposed. While these equations were all presented by the light intensity emitted from the analyzer, pixel values of the digital image were actually used in the real calculations. In this paper, a proposal of using relative light intensity obtained by the camera response function to replace the pixel value for photoelastic analysis was investigated. Generation of isochromatic images based on relative light intensity and pixel value were compared to evaluate the effectiveness of the new approach. The results showed that when relative light intensity was used, the quality of an isochromatic image can be greatly improved both visually and quantitatively. We believe that the technique proposed in this paper can also be used to improve the performance for the other types of photoelastic analysis using digital images.

© 2011 Optical Society of America

Algorithm and its application for automatic measurement of the full-field isoclinic parameter by digital phase-shifting photoelasticity

Wei Shang, Hulin Li, Jinghong Liu, and Jinzhao Liu
Appl. Opt. 61(35) 10433-10438 (2022)

Improved measurement of camera response function and its performance evaluation

Shih-Hsin Chang and Hsien-Huang P. Wu
Appl. Opt. 53(1) 82-89 (2014)

Separation of isoclinics and isochromatics from photoelastic data with a regularized phase-tracking technique

J. A. Quiroga and A. González-Cano
Appl. Opt. 39(17) 2931-2940 (2000)

Full-field automated photoelasticity by use of a three-wavelength approach to phase stepping

Andrew D. Nurse
Appl. Opt. 36(23) 5781-5786 (1997)

Digital holographic photoelasticity

C. S. Narayanamurthy, Giancarlo Pedrini, and Wolfgang Osten
Appl. Opt. 56(13) F213-F217 (2017)