1 October 1974 Amplitude Distribution Measurement Using Heterodyne Interferometry And Its Application To Position Sensing
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Abstract
This paper describes a method of measuring the amplitude and phase distribution of the optical field at and in the vicinity of the focus of any imaging system. The directional characteristic of optical heterodyne detection provides a means of obtaining extremely high spatial resolution in measurement. Experimental results include the measured amplitude distribution at the focus of an off-axis holographic zone plate. The results are extended to the case of a diffusely reflecting or transmitting object to obtain a position-sensing gauge. Analysis shows that for good resolution in position sensing the illuminated area of the object should be equal to the diffraction limited spot size of the receiver aperture. A description of the heterodyne interferometer and its possible areas of application are included.
Jean Louis Meyzonnette, N. Balasubramanian, "Amplitude Distribution Measurement Using Heterodyne Interferometry And Its Application To Position Sensing," Optical Engineering 13(5), 135455 (1 October 1974). https://doi.org/10.1117/12.7971747 . Submission:
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