Applications of Spatial Light Modulators in Raman Spectroscopy

Advances in consumer display screen technologies have historically been adapted by researchers across the fields of optics as they can be used as electronically controlled spatial light modulators (SLMs) for a variety of uses. The performance characteristics of such SLM devices based on liquid crystal (LC) and digital micromirror device (DMD) technologies, in particular, has developed to the point where they are compatible with increasingly sensitive instrumental applications, for example, Raman spectroscopy. Spatial light modulators provide additional flexibility, from modulation of the laser excitation (including multiple laser foci patterns), manipulation of microscopic samples (optical trapping), or selection of sampling volume (adaptive optics or spatially offset Raman spectroscopy), to modulation in the spectral domain for high-resolution spectral filtering or multiplexed/compressive fast detection. Here, we introduce the benefits of different SLM devices as a part of Raman instrumentation and provide a variety of recent example applications which have benefited from their incorporation into a Raman system.

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Rapid generation of perfect vortex beam without side lobes

Modern Physics Letters B ◽

10.1142/s0217984918502895 ◽

2018 ◽

Vol 32 (24) ◽

pp. 1850289

Author(s):

Siqi Li ◽

Mulong Liu ◽

Xingyi Li ◽

Zhiqiang Ge ◽

Lingxuan Zhang

Keyword(s):

Angular Momentum ◽

Orbital Angular Momentum ◽

Optical Communication ◽

Spatial Light Modulators ◽

Vortex Beam ◽

Digital Micromirror Device ◽

Light Modulators ◽

Rapid Generation ◽

Rapid Switching ◽

Topological Charges

We have proposed an approach for rapid generation of perfect vortex beam without side lobes through a digital micromirror device (DMD). Employing this method, the amplitude and phase of far field can be controlled indirectly by changing the rotation state of each unit on the DMD. The perfect vortex beams of equal rings diameter independent of their topological charges are generated commendably and the side lobes are avoided. Moreover, we have demonstrated rapid switching among the generated orbital angular momentum modes at the speed of 10 kHz, which is much faster than that of the usual method realized by spatial light modulators (SLMs). The proposed method is very beneficial for the optical communication and trapping or manipulating the small particle based on orbital angular momentum modes.

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Practical issues for the use of liquid crystal spatial light modulators in adaptive optics

Optics Communications ◽

10.1016/s0030-4018(97)00586-5 ◽

1998 ◽

Vol 148 (4-6) ◽

pp. 323-330 ◽

Cited By ~ 10

Author(s):

G.T Bold ◽

T.H Barnes ◽

J Gourlay ◽

R.M Sharples ◽

T.G Haskell

Keyword(s):

Liquid Crystal ◽

Adaptive Optics ◽

Spatial Light Modulators ◽

Light Modulators

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Evaluation of Two-Dimensional Phase Unwrapping Algorithms for Interferometric Adaptive Optics Utilizing Liquid-Crystal Spatial Light Modulators

The Open Optics Journal ◽

10.2174/1874328500802010048 ◽

2008 ◽

Vol 2 (1) ◽

pp. 48-52 ◽

Cited By ~ 2

Author(s):

K. L. Baker ◽

D. A. Silva

Keyword(s):

Liquid Crystal ◽

Adaptive Optics ◽

Phase Unwrapping ◽

Spatial Light Modulators ◽

Two Dimensional ◽

Light Modulators

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Microscope-Cockpit: Python-based bespoke microscopy for bio-medical science

Wellcome Open Research ◽

10.12688/wellcomeopenres.16610.1 ◽

2021 ◽

Vol 6 ◽

pp. 76

Author(s):

Mick A. Phillips ◽

David Miguel Susano Pinto ◽

Nicholas Hall ◽

Julio Mateos-Langerak ◽

Richard M. Parton ◽

...

Keyword(s):

Open Source ◽

Adaptive Optics ◽

High Performance ◽

Medical Science ◽

Machine Learning Algorithms ◽

Spatial Light Modulators ◽

Structured Illumination ◽

Light Modulators ◽

Wide Range ◽

User Friendly

We have developed “Microscope-Cockpit” (Cockpit), a highly adaptable open source user-friendly Python-based Graphical User Interface (GUI) environment for precision control of both simple and elaborate bespoke microscope systems. The user environment allows next-generation near instantaneous navigation of the entire slide landscape for efficient selection of specimens of interest and automated acquisition without the use of eyepieces. Cockpit uses “Python-Microscope” (Microscope) for high-performance coordinated control of a wide range of hardware devices using open source software. Microscope also controls complex hardware devices such as deformable mirrors for aberration correction and spatial light modulators for structured illumination via abstracted device models. We demonstrate the advantages of the Cockpit platform using several bespoke microscopes, including a simple widefield system and a complex system with adaptive optics and structured illumination. A key strength of Cockpit is its use of Python, which means that any microscope built with Cockpit is ready for future customisation by simply adding new libraries, for example machine learning algorithms to enable automated microscopy decision making while imaging.

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Improving the Performance of Air Force Adaptive Optics Systems Using High-Resolution Spatial Light Modulators with Deformable Mirrors: Final Report

10.21236/ada413488 ◽

2002 ◽

Author(s):

Michael K. Giles ◽

Mikhail Vorontsov ◽

Michael Roggem

Keyword(s):

High Resolution ◽

Adaptive Optics ◽

Air Force ◽

Deformable Mirrors ◽

Spatial Light Modulators ◽

Final Report ◽

Light Modulators

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The Moving Liquid Mirror (MLM) Spatial Light Modulator: Simulation and Measurement of the Optical Performance

10.1115/imece2000-1128 ◽

2000 ◽

Author(s):

Alexander Wolter ◽

Detlef Kunze ◽

Wolfgang Doleschal ◽

Hubert Lakner ◽

Günter Zimmer

Keyword(s):

Adaptive Optics ◽

Cmos Technology ◽

Optical Signal ◽

Spatial Light Modulators ◽

Direct Writing ◽

Writing Systems ◽

Electrode Structure ◽

Light Modulator ◽

Light Modulators ◽

Moving Liquid

Abstract Spatial light modulators (SLM) are electro-optical devices employed as optical pattern generators in applications like projection displays, direct-writing systems for photolithographic patterning, adaptive optics or optical signal processing. Here we report on the “moving liquid mirror” (MLM) as a new micromechanical actuator technology based on a deformable oil film on an aluminum mirror with electrode structure. The actuator is suitable for integration on a silicon backplane as CMOS-addressing circuit. Thus production in standard CMOS-technology is possible. A theoretical analysis of the device behavior is given, and the results of simulations are presented. Measurements on passive devices show good agreement with the simulations. Finally, active MLM-devices have been fabricated. Images can be programmed into the devices and observed under a microscope (figure 1).

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