Open AccessOptimization of optoelectronic reconstruction of phase hologram by use of digital blazed grating
Author(s) -
Yongmei Yu,
Tao Wang,
Huadong Zheng
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.3154
Subject(s) - holography , grating , optics , blazed grating , spatial light modulator , diffraction efficiency , materials science , phase (matter) , pixel , diffraction grating , digital holography , diffraction , holographic grating , optoelectronics , physics , quantum mechanics
The utilization efficiency of light energy is affected by the multi-order images during the reconstruction of holograms based on liquid crystal spatial light modulator LC-SLM, which leads to the low intensity of single image. A novel method is proposed to improve the diffraction efficiency of single reconstructed image by synthesizing phase hologram and digital blazed grating. The property and principle of wave-front modulation are analyzed by use of digital blazed grating as diffractive optical element DOE. The effect of digital blazed grating on the reconstructed image of phase hologram by use of LC-SLM is also described. Holographic optoelectronic display system based on LC-SLM is set up for phase hologram reconstruction. Theoretical analysis shows that, the intensity of single reconstructed image is increased by 1302 per cent by adding digital blazed grating with period of 2 pixels in vertical or horizontal direction, and 4297 per cent with the same period of digital blazed grating in vertical & horizontal directions. The experimental result also verifies that, by the proposed method, the energy intensity of single reconstructed image is increased and the utilization efficiency of light energy is improved.