11 May 2018 Efficiency measurements for a digital-holography system
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This paper compares efficiency measurements to predictions for a digital-holography system operating in the off-axis image plane recording geometry. We use a highly coherent 532 nm laser source, an extended Spectralon object, and an Si focal-plane array to perform digital-holographic detection, which provides access to an estimate of the complex-optical field and is of utility to long-range imaging applications. In the experiments, digitalholographic detection results from the interference of a signal beam with a reference beam. The signal beam was created from the active illumination of the extended Spectralon object and the reference beam from a local oscillator which is split off from the master-oscillator 532 nm laser source. To compare efficiency measurements to predictions, an expression was developed for the signal-to-noise ratio, which contains many multiplicative terms with respect to total-system efficiency. In the best case, the measured total efficiency was 15.2% ± 5.8% as compared to the predicted 16.4%. The results show that the polarization and the fringe-integration efficiency terms play the largest role in the total-system efficiency.
Conference Presentation
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Douglas E. Thornton, Douglas E. Thornton, Mark F. Spencer, Mark F. Spencer, Christopher A. Rice, Christopher A. Rice, Glen P. Perram, Glen P. Perram, } "Efficiency measurements for a digital-holography system ", Proc. SPIE 10650, Long-Range Imaging III, 1065004 (11 May 2018); doi: 10.1117/12.2304689; https://doi.org/10.1117/12.2304689


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