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

fYear

1996

fDate

9-11 Dec 1996

Firstpage

101

Lastpage

105

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Cybernetic Vision, 1996. Proceedings., Second Workshop on

Conference_Location

Sao Carlos

Print_ISBN

0-8186-8058-X

Type

conf

DOI

10.1109/CYBVIS.1996.629447

Filename

629447