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Step-by-step guide to reduce spatial coherence of laser light

Speckle Reduction. Optotoune's laser speckle reducers are nothing else than moving diffusers. But the way they are actuated is absolutely unique. Within a height of less than 1mm, electroactive polymers are used to generate an oscillating motion (e.g. 400µm travel at 300Hz).

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In this paper, we describe a speckle reduction system that can be used with high speed cameras to increase the frame rates of the interferometer and creates less vibration in the system. 2021-03-01 To conclude we present results that show that the speckle contrast can be reduced to C = 0.11 ± 0.02 at a temperature of 30ºC and demonstrate the improvement of the quality of an image generated using a modified commercial projector fitted with a monochromatic laser source. This article is protected by copyright.

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Offering a compact size, integrated drive electronics, and vibration-less speckle reduction, Optotune laser speckle reducers are ideal for beam homogenization, 3D scanning, metrology, microscopy, and interferometry. 2009-08-31 By combining this with our unique optical elements, we are able to provide a compact system (5×10×3mm) with a high level of speckle reduction (speckle contrast 0.1). RICOH Industrial Solutions Inc. will continue to collaborate with RICOH Group companies and accelerate our research and development to further expand business in the laser light source projector field, where needs are growing.

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Moreover, the speckle contrast value can be further reduced by the addition of a deformable mirror. Laser speckle reduction due to spatial and angular diversity introduced by fast scanning micromirror M. Nadeem Akram, Zhaomin Tong, Guangmin Ouyang, Xuyuan Chen, and Vladimir Kartashov Appl. Opt. 49(17) 3297-3304 (2010) Speckle reduction in laser projection displays through angle and wavelength diversity This laser speckle reduction is an ideal choice for fiber assemblies used in a variety of applications where modal noise interferes with optimal performance. Fiberguide has developed a small, simple and integrated de-speckling system which maximizes performance and reliability in illumination, with no optical loss. 2021-03-01 · To illustrate, visually, the speckle reduction improvement afforded with the LC device used in this study, photographs of laser projected images are shown in Fig. 8. For this experiment, the He–Ne laser is propagated through the 1951 USAF target and the resultant image is projected onto a white screen using the set-up presented in Figure S1 . Optotune laser speckle reducers remove local interferences and significantly reduce speckle noise in laser systems by dynamically diffusing the laser beam.

Optotune's laser speckle reducers are nothing other than moving diffusers. But the way they are actuated is absolutely unique. Two innovative technologies are offered, each with its own advantages. Electro-active polymer LSR. Optotune is the first to commercialize electro-active polymers (EAPs) in the field of optics. Optotune Laser Speckle Reducers remove local interferences and significantly reduce speckle noise in laser systems by dynamically diffusing the laser beam. Offering a compact size, integrated drive electronics, and vibration-less speckle reduction, Optotune Laser Speckle Reducers are ideal for beam homogenization, 3D scanning, metrology, microscopy, and interferometry. 2018-09-26 In order to improve image quality, speckle reduction is required in laser displays.
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This provides a way of mode mixing from the splitting of single point source ( laser) into multiple modes due to transfer of fiber bundles through the fibers (spatial coherence reduction) and bundle rotation (temporal coherence reduction). Speckle Reduction. Optotoune's laser speckle reducers are nothing else than moving diffusers. But the way they are actuated is absolutely unique. Within a height of less than 1mm, electroactive polymers are used to generate an oscillating motion (e.g.

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Speckle reduction characteristics of a chiral nematic LC device (E7 + 2.5 wt% BDH1281, pitch 517 nm) when subjected to different amplitudes of a square-wave electric field at a frequency of 40 Hz The reduction of speckle is important for applications where a homogeneous laser output of uniform intensity is ideal, such as laser-scanning microscopy, flow cytometry, and DNA sequencing. By using Fiberguide’s De-Speckler to average the modal noise and greatly reduce speckle, maximized performance can be achieved.

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Meifang Xu, Wenhong Gao, and Xuyuan 9 Jan 2020 An apparatus that relies on patterned metasurfaces to reduce speckle when illuminating an object with coherent light. The metasurfaces serve KEYWORDS： Speckle contrast, Laser display, Visual quality, Wavelength diversity. ABSTRACT. Speckle reduction by using multiple wavelength lasers were 29 Aug 2019 In this paper, we present experimental results on speckle noise In the experiment, a multimode semiconductor 520 ± 5-nm laser with a Ideal for Eliminating Laser Speckle Noise; Plug and Play with Integrated Drive Electronics; 6 - 24 Degree Diffusing Angles Available imaging tools such as dermoscopy or confocal laser scan microscopy [2, 4].