Real-Time Fringe Processing by Hybrid Analog-Digital System

S. Toyooka; K. Ohashi; K. Yamada; K. Kobayashi

doi:10.1117/12.967140

1 January 1987 Real-Time Fringe Processing by Hybrid Analog-Digital System

S. Toyooka, K. Ohashi, K. Yamada, K. Kobayashi

Proceedings Volume 0813, Optics and the Information Age; (1987) https://doi.org/10.1117/12.967140
Event: 14th Congress of the International Commission for Optics, 1987, Quebec, Canada

Abstract

Two-dimensional fringe pattern such as interference fringes or incoherent grating-like pattern are widely used to measure surface configuration, roughness, and deformation. Recently several methods of automatic fringe processing have been developed. These methods are on the basis of Fourier analysis and then have high precision. They can be classified into two typed in which a desired phase modulation is treated (1) on temporally varying carrier such as fringe scanning method (2) on spatially varying carrier such as Fourier transform method":). In the later, whole field of phase distribution can be determined by analyzing only one fringe pattern, and then real-time processing is possible In our present paper, we propose real-time fringe processing system by using an analog-digital hybrid system.

Citation Download Citation

S. Toyooka, K. Ohashi, K. Yamada, and K. Kobayashi "Real-Time Fringe Processing by Hybrid Analog-Digital System", Proc. SPIE 0813, Optics and the Information Age, (1 January 1987); https://doi.org/10.1117/12.967140

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