18 March 2016 Binary hologram based high speed zonal wavefront sensing with reduced estimation time
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Abstract
Reduced wavefront estimation time in a Shack-Hartmann type wavefront sensor plays an important role in any high speed application of the sensor. Exploiting computer generated holography technique, one can generate an array of binary diffraction grating pattern to produce an array of focal spots, similar to that in a Shack Hartmann wavefront sensor (SHWS). The transmittance functions of each of such a grating pattern can be configured to produce a one dimensional (1D) array of focal spots of a desired order. In this paper, we show that the formation of 1D array, further facilitates in the process of single indexed wavefront estimation in its true sense that considerably reduces the wavefront estimation time.
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Biswajit Pathak, Bosanta R. Boruah, "Binary hologram based high speed zonal wavefront sensing with reduced estimation time", Proc. SPIE 9741, High-Power Laser Materials Processing: Lasers, Beam Delivery, Diagnostics, and Applications V, 97410T (18 March 2016); doi: 10.1117/12.2213986; https://doi.org/10.1117/12.2213986
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