Matched-filtering generalized phase contrast using LCoS pico-projectors for beam-forming

Andrew Rafael Bañas, Darwin Palima, Jesper Glückstad

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

327 Downloads (Pure)

Abstrakt

We report on a new beam-forming system for generating high intensity programmable optical spikes using so-called matched-filtering Generalized Phase Contrast (mGPC) applying two consumer handheld pico-projectors. Such a system presents a low-cost alternative for optical trapping and manipulation, optical lattices and other beam-shaping applications usually implemented with high-end spatial light modulators. Portable pico-projectors based on liquid crystal on silicon (LCoS) devices are used as binary phase-only spatial light modulators by carefully setting the appropriate polarization of the laser illumination. The devices are subsequently placed into the object and Fourier plane of a standard 4f-setup according to the mGPC spatial filtering configuration. Having a reconfigurable spatial phase filter, instead of a fixed and fabricated one, allows the beam shaper to adapt to different input phase patterns suited for different requirements. Despite imperfections in these consumer pico-projectors, the mGPC approach tolerates phase aberrations that would have otherwise been hard to overcome by standard phase projection.
OriginalsprogEngelsk
TidsskriftOptics Express
Vol/bind20
Udgave nummer9
Sider (fra-til)9705-9712
ISSN1094-4087
DOI
StatusUdgivet - 2012
Udgivet eksterntJa

Bibliografisk note

This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/oe/abstract.cfm?uri=oe-20-9-9705. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

Fingeraftryk Dyk ned i forskningsemnerne om 'Matched-filtering generalized phase contrast using LCoS pico-projectors for beam-forming'. Sammen danner de et unikt fingeraftryk.

Citationsformater