25 November 1993 Beam design of a noncooperative interferometer
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An optical minimum configuration of a laser interferometer for noncooperative scattering objects is investigated. An optimization of the SNR (signal-to-noise ratio) of the homodyne receiver is achieved by beam design. Scattering measurement object surfaces generate a speckle pattern on the detector surface which influences the SNR. Within the whole operating range of the optics, the transmitted light spot on the surface under investigation should therefore be small. The receiving optics should image the light spot onto the detector surface. The detection of a noncooperative object in a distance of 26 m is proven experimentally.
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Michael Hoelscher, Michael Hoelscher, Wolfgang Holzapfel, Wolfgang Holzapfel, "Beam design of a noncooperative interferometer", Proc. SPIE 2000, Current Developments in Optical Design and Optical Engineering III, (25 November 1993); doi: 10.1117/12.163638; https://doi.org/10.1117/12.163638

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