Abstract

The theory of moire deflectometry is derived using the Fourier series approach. The advantages and disadvantages of the infinite fringe limit are demonstrated. The approach of fringe deviation is compared to the intensity measurement, which is selected as being more suitable for flames. An experimental technique based on pointwise scanning is developed to obviate the deficiencies of the video system used previously. Moire data of CH₄/air flame are interpreted, and a full map of the temperature and gas density in the flame is produced. A comparison between moire deflectometry and related techniques is given.

© 1983 Optical Society of America

Measurements of temperature distribution of flames by moire deflectometry

E. Keren, E. Bar-Ziv, I. Glatt, and O. Kafri
Appl. Opt. 20(24) 4263-4266 (1981)

Effect of diffraction on the moire image for temperature mapping in flames

Ezra Bar-Ziv
Appl. Opt. 23(22) 4040-4044 (1984)

Deflection mapping of flames using the moire effect

Gerald S. Rau and Ezra Bar-Ziv
Appl. Opt. 23(16) 2686-2692 (1984)

Infinite fringe moire deflectometry

O. Kafri, A. Livnat, and E. Keren
Appl. Opt. 21(21) 3884-3886 (1982)

Analysis of 3-D phase objects by moire deflectometry

Josef Stricker
Appl. Opt. 23(20) 3657-3659 (1984)