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17 November 2010 Phase compensation for eliminating black-matrix effect of phase-only spatial light modulator
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Abstract
A method for improving the performance of phase-only spatial light modulator (SLM) is proposed in this paper. For an electrical-addressed SLM, the pixelated structure just likes a 2D black-matrix. It will have an intrinsic effect on the incident light whether image is loaded into SLM. This inherent effect was called black-matrix effect characterized with zero-order diffraction of high brightness and high-order diffraction terms in the Fourier plane. This is strongly influenced the quality of phase modulation. In order to eliminate the black-matrix effect of SLM, a linear phase map or a digital Fresnel lens is compensated to the original phase map. The black-matrix effect will be separated with the reconstruction pattern in the perpendicular plane of the optical axis or along the optical axis. Therefore, the black-matrix effect will be eliminated through digital phase compensation. The theoretical analyze, computer simulations and experimental results are all presented to demonstrate the validity. Possible applications include almost all phase modulation applications.
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Jindong Tian, Dong Li, Haiou Qi, and Jianfeng Zheng "Phase compensation for eliminating black-matrix effect of phase-only spatial light modulator", Proc. SPIE 7848, Holography, Diffractive Optics, and Applications IV, 78481E (17 November 2010); doi: 10.1117/12.869906; https://doi.org/10.1117/12.869906
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