Two applications of liquid crystal displays in diffractive optics under polychromatic illumination

Andrés Márquez; Claudio Iemmi; Juan Campos; Juan Carlos Escalera; María Josefa Yzuel

doi:10.1117/12.662673

25 April 2006 Two applications of liquid crystal displays in diffractive optics under polychromatic illumination

Andrés Márquez, Claudio Iemmi, Juan Campos, Juan Carlos Escalera, María Josefa Yzuel

Proceedings Volume 6187, Photon Management II; 61870E (2006) https://doi.org/10.1117/12.662673
Event: SPIE Photonics Europe, 2006, Strasbourg, France

Abstract

The amplitude and phase modulations provided by a liquid-crystal spatial light modulator (LCSLM) depend strongly on the wavelength used for illumination. This is the main reason why usually LCSLMs are only applied with monochromatic illumination. However, there are a number of potential applications where it would be very interesting to combine the programmability provided by LCSLMs and the use of non- monochromatic illumination. In this work we focus on two such applications. On one hand, we use an axial apodizing filter to compensate the longitudinal secondary axial color (LSAC) effects of a commercial refractive optical system on the polychromatic point-spread function (PSF). The configuration of the LCSLM has been optimized to obtain the amplitude-mostly regime in polychromatic light. On the other hand, we show a programmable diffractive lens which is able to provide equal focal length for several wavelengths simultaneously. To achieve this achromatization it is necessary that the LCD operates in the phase-only regime simultaneously for the different wavelengths. Both experimental and numerical results will be provided in this work showing the feasibility of the two applications, and thus the use of LCSLMs under non-monochromatic illumination.

Citation Download Citation

Andrés Márquez, Claudio Iemmi, Juan Campos, Juan Carlos Escalera, and María Josefa Yzuel "Two applications of liquid crystal displays in diffractive optics under polychromatic illumination", Proc. SPIE 6187, Photon Management II, 61870E (25 April 2006); https://doi.org/10.1117/12.662673

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