Title :
Complex wave front manipulation using liquid crystal televisions and computer-generated holograms
Author :
Neto, Luiz Gonçalves ; Roberge, Danny ; Sheng, Yunlong
Author_Institution :
Lab. of Integrated Syst., Sao Paulo Univ., Brazil
Abstract :
We demonstrate a spatial light modulator (SLM) that provides a complex wave front manipulation using commercially available liquid-crystal televisions (LCTV). A simple wedged shear plate interferometer is proposed for in situ measurement of the phase modulation and the operating curve of this SLM. We obtain the continuous complex amplitude modulation using two cascaded LCTV´s. A look-up table encoding method is proposed for compensating effects of the phase amplitude coupling and the nonlinearity in the two LCTV´s. A complex amplitude 2D grating is used for testing the optical complex amplitude modulation
Keywords :
amplitude modulation; computer-generated holography; electro-optical modulation; holographic interferometry; holographic optical elements; image coding; image reconstruction; light propagation; liquid crystal displays; optical testing; spatial light modulators; table lookup; SLM; cascaded LCTV; complex amplitude 2D grating; complex wave front manipulation; computer-generated holograms; continuous complex amplitude modulation; liquid crystal televisions; look-up table encoding method; nonlinearity; optical complex amplitude modulation; phase amplitude coupling; phase modulation; simple wedged shear plate interferometer; spatial light modulator; Amplitude modulation; Couplings; Encoding; Liquid crystals; Optical interferometry; Optical modulation; Phase measurement; Phase modulation; TV; Table lookup;
Conference_Titel :
Cybernetic Vision, 1996. Proceedings., Second Workshop on
Conference_Location :
Sao Carlos
Print_ISBN :
0-8186-8058-X
DOI :
10.1109/CYBVIS.1996.629447
