Biostereometrical Application Of Moire Fringe Method With Special Reference To Our Optical Device In Aid Of Parallel Light

H. Terada; T. Ikeda

doi:10.1117/12.956922

29 July 1980 Biostereometrical Application Of Moire Fringe Method With Special Reference To Our Optical Device In Aid Of Parallel Light

H. Terada, T. Ikeda

Author Affiliations +

Proceedings Volume 0166, NATO Symposium on Applications of Human Biostereometrics; (1980) https://doi.org/10.1117/12.956922
Event: NATO Symposium on Applications of Human Biostereometrics, 1978, Paris, France

Abstract

Biostereometrical approach in aid of moire interference fringe has an advantage in that the contour fringes on the surface of an object are promptly visible to the naked eye and are recorded photographically. Even the movement of these fringes concomitant with the motion of the human body can be recorded by movie camera or video TV. One of the limitations of this moire method using radiating light is that the value of contour interval is obliged to increase gradually with the advancement of the ordinal number of fringes counted from the grating. To cover this demerit, a new moire technique with parallel light has been developed at our laboratory. The parallel light is provided by an optical system including a field lense. Our optical apparatus makes it possible to get equal intervals of the succeeding contour fringes, irrespective of the fringe order. Any requested contour intervals are attained by choosing a grating with suitable pitch and/or an appropriate incidence angle of the parallel light at the grating. The automatic input of analogue data of moire patterns into the central processing unit is accomplished by a TV camera and A/D converter. Examples of line printer output through this conversion system are given.

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H. Terada and T. Ikeda "Biostereometrical Application Of Moire Fringe Method With Special Reference To Our Optical Device In Aid Of Parallel Light", Proc. SPIE 0166, NATO Symposium on Applications of Human Biostereometrics, (29 July 1980); https://doi.org/10.1117/12.956922

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