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Programmable generation of arbitrary field distributions
A spatial light modulator (SLM) is a two-dimensional array of phase-retarding elements (2 million pixels). In this project a pair of liquid crystal SLMs will be used to generate an arbitrary programmable field distribution in a cross-sectional plane (x,y).
A spatial light modulator (SLM) is a two-dimensional array of phase-retarding elements ( 2 million pixels). These elements can be made by miniaturized deformable mirrors or by liquid crystals, and their phase retardation can be adjusted by software.
In this project a pair of liquid crystal SLMs will be used to generate an arbitrary programmable field distribution in a cross-sectional plane (x,y). One of the SLMs rotates the polarization by an amount (x; y) and the other SLM delays the phase by an amount (x; y).
The student will 1) set up the optical system shown in the figure below, 2) calibrate the SLMs, 3) program the software to set the polarization and the phase for every image pixel (x,y), and 4) test the system by generating and evaluating desired field distributions.
References:
[1] C. Maurer et al., “What spatial light modulators can do for optical microscopy,” Laser Photonics
Rev. 5, 81–101 (2011).
[2] M. R. Beversluis, L. Novotny, and S. J. Stranick, “Programmable vector point-spread function
engineering,” Opt. Exp. 14, 2650–2656 (2006).
A spatial light modulator (SLM) is a two-dimensional array of phase-retarding elements ( 2 million pixels). These elements can be made by miniaturized deformable mirrors or by liquid crystals, and their phase retardation can be adjusted by software. In this project a pair of liquid crystal SLMs will be used to generate an arbitrary programmable field distribution in a cross-sectional plane (x,y). One of the SLMs rotates the polarization by an amount (x; y) and the other SLM delays the phase by an amount (x; y). The student will 1) set up the optical system shown in the figure below, 2) calibrate the SLMs, 3) program the software to set the polarization and the phase for every image pixel (x,y), and 4) test the system by generating and evaluating desired field distributions.
References: [1] C. Maurer et al., “What spatial light modulators can do for optical microscopy,” Laser Photonics Rev. 5, 81–101 (2011). [2] M. R. Beversluis, L. Novotny, and S. J. Stranick, “Programmable vector point-spread function engineering,” Opt. Exp. 14, 2650–2656 (2006).
Not specified
Felix Tebbenjohanns (tefelix@student.ethz.ch), Lukas Novotny (lnovotny@ethz.ch)
Felix Tebbenjohanns (tefelix@student.ethz.ch), Lukas Novotny (lnovotny@ethz.ch)