Frequently two-dimensional interferograms are obtained when a point-diffraction interferometer (PDI) is used in optical
testing. The PDI is a simple, convenient and robust tool for optical shop testing. In this paper, we propose the use of the
PDI and placing a slit at the exit pupil to scanning the surface under test. Stitching is then used to generate a phase map
of the test wavefront. The advantage of the proposal is the sharpness of the fringes to obtain high resolution contour of
the test wavefront, we describe the method and some experimental results.
The Irradiance Transport Equation (ITE), found by Teague, had been used in optics with different applications. One of the field where had been used is in optical testing, for example, with the method developed by Takeda. In this paper following the idea of using different optical and mathematical analysis method, theorical and experimental results are presented.
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