2 August 2010 Polarized point diffraction interferometer for fringe stabilization
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We propose a new point diffraction interferometer using a polarizer with a pinholed for qualitative optical analysis. Diffraction from a polarizer with a pinholed makes reference and measurement waves. Interference fringe between diffracted-undiffracted measurement wave and undiffracted-diffracted reference wave is stabilized by common-path configuration. We examined the pinhole size and divergence angle of the diffracted wave for test optics with various numerical aperture. Optical parts comprising the interferometer can be assembled into a small monolithic component and embedded into an imaging target for easy alignment. Optical systems evaluating imaging performances such as modulation transfer function would benefit in aligning target objects.
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Hagyong Kihm, Hagyong Kihm, Yun-Woo Lee, Yun-Woo Lee, } "Polarized point diffraction interferometer for fringe stabilization", Proc. SPIE 7790, Interferometry XV: Techniques and Analysis, 779013 (2 August 2010); doi: 10.1117/12.859805; https://doi.org/10.1117/12.859805

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