Carlo Amadeo Alonzo et al 2007 New J. Phys. 9 132 doi:10.1088/1367-2630/9/5/132
Photon-efficient grey-level image projection by the generalized phase contrast method
Carlo Amadeo Alonzo, Peter John Rodrigo and Jesper Glückstad1
Show affiliationsThe generalized phase contrast (GPC) method is analysed in the context of projecting two-dimensional grey-level images. A rectangular phase contrast filter is introduced, instead of the usually applied circular filter, to correspond better with the rectangular aperture characteristic of commercially available spatial light modulators. A simple expression is derived for determining the appropriate phase-only modulation to convert an initial plane wave illumination into a desired output intensity distribution. Numerical simulations demonstrate excellent image reconstruction by GPC using the derived phase-to-intensity mapping. Optical throughput is predicted to be as high as 87% for optimum image quality, and may reach 98% with some trade-off in image fidelity.
- PACS
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42.30.Wb Image reconstruction; tomography
- Subjects
- Dates
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Issue 5 (May 2007)
Received 19 January 2007
Published 18 May 2007
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Photon-efficient grey-level image projection by the generalized phase contrast method
Carlo Amadeo Alonzo et al 2007 New J. Phys. 9 132
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