Abstract
Real-time holographic recording has been demonstrated using the optical heterodyne scanning technique proposed by Poon.1,2 In this paper we discuss the recording and reconstruction of holograms generated by the heterodyne scanning technique. The primary concentration is on realtime reconstruction using an electron beam addressed spatial light modulator (EBSLM). For comparison, coherent reconstruction methods are also presented. Additional topics to be addressed are the operation and the spatial frequency limitations of the EBSLM, and the incoherent point-spread function (PSF) of the holographic imaging system. Based upon the derived PSF, the reconstructed real image of a simple slit object is formulated and compared to experimental observations. Our findings indicate that indeed the EBSLM affords the advantage of real-time display of holographic images. However, because of low spatial resolution (~7.4 lp/mm), only holograms of simple objects are suitable for reconstruction using the EBSLM.
© 1991 Optical Society of America
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