The image is blurred and shaken when the object through a flow with random refractive index distribution. As the response time of the image detector is far longer than that of the random disturbance, what the detector actually detects is an integral picture within the response time. Therefore, researches on the mean image quality within the detector's response time are great helpful to image recovering and correction.In this paper, Monte Carlo method is used to simulate the time-related random fluctuation of the inhomogeneous medium, which can be treated statistically. According to the mean value and variance of the refractive index at each position within the random medium during detector's response time, many sample refractive distributions are generated to describe the disturbance with time. And then, ray trace through the generated medium with different refractive index distribution is made, and the spot diagram at each sample medium is summed up as the final result. Finally, taking the flowing liquid as an example, we obtained the spot diagram through a medium with disturbance, and made a comparison with that through a medium with the mean refractive distribution.

Date Published: 28 November 2007
PDF: 7 pages
Proc. SPIE 6834, Optical Design and Testing III, 68341C (28 November 2007); doi: 10.1117/12.755831

Published in SPIE Proceedings Vol. 6834:
Optical Design and Testing III
Yongtian Wang; Theo T. Tschudi; Jannick P. Rolland; Kimio Tatsuno, Editor(s)