Proceedings PaperImmersion method for determination of absolute surface relief
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In this paper, the new contouring method based on the use of an absorptive medium is presented. Theoretical calculation shows that the conventional immersion mapping method can be modified for analysis of object form on one interferogram. In the experiment, we obtain a contour map of wedge-like surface. The absorptive medium was aqueous solution of dye, which has an absorptive line in the range of He-Ne laser irradiation. Water is the second immersion medium. The contour map of the object has fringe visibility changing with the object depth, due to absorption of the first medium.