Publication

Two-Dimensional MEMS Stage Integrated With Microlens Arrays for Laser Beam Steering

Cyrille Hibert, Sven Holmström, Sertan Kutal Gökce, David Bowman
2011
Journal Articles

Abstract

A novel microelectromechanical stage with one uniaxial set of combs capable of 2-D actuation is presented. A polymer microlens array (MLA) is mounted vertically onto the stage. Driven at resonance, the stage deflects 124 mu m out of plane and 34 mu m in plane. Finally, laser beam steering is demonstrated using two cascaded MLAs.

Official source

https://infoscience.epfl.ch/entities/publication/10c7a8ac-c564-4b5e-8b30-0ba91427333d

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Cyrille Hibert, Sven Holmström, Sertan Kutal Gökce, David Bowman
2011
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/10c7a8ac-c564-4b5e-8b30-0ba91427333d

About this result

Related concepts (9)

Birefringence

Birefringence is the optical property of a material having a refractive index that depends on the polarization and propagation direction of light. These optically anisotropic materials are said to be birefringent (or birefractive). The birefringence is often quantified as the maximum difference between refractive indices exhibited by the material. Crystals with non-cubic crystal structures are often birefringent, as are plastics under mechanical stress.

Crystal optics

Crystal optics is the branch of optics that describes the behaviour of light in anisotropic media, that is, media (such as crystals) in which light behaves differently depending on which direction the light is propagating. The index of refraction depends on both composition and crystal structure and can be calculated using the Gladstone–Dale relation. Crystals are often naturally anisotropic, and in some media (such as liquid crystals) it is possible to induce anisotropy by applying an external electric field.

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In optics, polarized light can be described using the Jones calculus, discovered by R. C. Jones in 1941. Polarized light is represented by a Jones vector, and linear optical elements are represented by Jones matrices. When light crosses an optical element the resulting polarization of the emerging light is found by taking the product of the Jones matrix of the optical element and the Jones vector of the incident light. Note that Jones calculus is only applicable to light that is already fully polarized.

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