17 February 1987 The Image Photo-Carrier Theory And Its Application To The Determination Of Principal Stress Direction
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Abstract
The image photo-carrier theory as a new technique in photomechanics is described in this paper. The idea of high frequence photo-carrier which can transform the photoelasticity fringe into moire fringe and the single phase carrier method are presented by the author. According to the idea as mentioned above the physics and mathematics relation between the principal stress direction and moire fringe obtained from photo-carrier is established. The photo-carrier possesses some special functions which make it possible to determine automatically the fringe order and the fractional fringe value by the image processing system, in consequence of which provides an effective technique for collection and processing automatization in photomechanics.
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Wang Rupeng, "The Image Photo-Carrier Theory And Its Application To The Determination Of Principal Stress Direction", Proc. SPIE 0814, Photomechanics and Speckle Metrology, (17 February 1987); doi: 10.1117/12.941705; https://doi.org/10.1117/12.941705
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KEYWORDS
Moire patterns

Fringe analysis

Photoelasticity

Image processing

Modulation

Speckle metrology

Phase shift keying

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