Browsing by Author "Joenathan, Charles"

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    Contouring by electronic speckle pattern interferometry employing dual beam illumination
    (1990) Joenathan, Charles; Pfister, Berthold P.; Tiziani, Hans J.
    In this paper we extend and study the method for generating contours of diffuse objects employing a dual beam illumination coupled with electronic speckle pattern interferometry. The sensitivity and the orientation of the contour planes are analyzed. A novel method for tilting the planes of contours and experimental results incorporating phase shifting and fringe analysis are also presented. The theoretical and the experimental results show good agreement.
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    Oblique incidence and observation electronic speckle-pattern interferometry
    (1994) Joenathan, Charles; Franze, Bernhard; Tiziani, Hans J.
    In this paper we discuss an oblique incidence and observation electronic speckle-pattern interferometer, in which we use an anamorphic prism in front of the object. A collimated beam traveling through the prism is partly reflected at the base of the prism. The reflected light is the reference beam and the transmitted light illuminates the diffuse object, thereby generating the object beam. In this scheme the object and the reference beams are collinear. A new scheme that uses two prisms and permits phase stepping is also presented.