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High-brightness laser imaging with tunable speckle reduction enabled by electroactive micro-optic diffusers

机译：高亮度激光成像可通过电活性微光学漫射器实现可调节的斑点减少

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摘要

High coherence of lasers is desirable in high-speed, high-resolution, and wide-field imaging. However, it also causes unavoidable background speckle noise thus degrades the image quality in traditional microscopy and more significantly in interferometric quantitative phase imaging (QPI). QPI utilizes optical interference for high-precision measurement of the optical properties where the speckle can severely distort the information. To overcome this, we demonstrated a light source system having a wide tunability in the spatial coherence over 43% by controlling the illumination angle, scatterer’s size, and the rotational speed of an electroactive-polymer rotational micro-optic diffuser. Spatially random phase modulation was implemented for the lower speckle imaging with over a 50% speckle reduction without a significant degradation in the temporal coherence. Our coherence control technique will provide a unique solution for a low-speckle, full-field, and coherent imaging in optically scattering media in the fields of healthcare sciences, material sciences and high-precision engineering.

机译：激光的高相干性在高速，高分辨率和宽视场成像中是理想的。但是，它也会引起不可避免的背景斑点噪声，从而降低了传统显微镜的图像质量，尤其是在干涉定量相位成像（QPI）中。 QPI利用光学干涉对光学特性进行高精度测量，其中斑点会严重扭曲信息。为了克服这个问题，我们展示了一种光源系统，该光源系统通过控制照明角度，散射体的大小和电活性聚合物旋转微光扩散器的转速，在空间相干性方面具有超过43％的可调性。对下散斑成像实施了空间随机相位调制，散斑减少了50％以上，而时间相干性没有明显下降。我们的相干控制技术将为医疗科学，材料科学和高精度工程领域中的光散射介质中的低散斑，全场和相干成像提供独特的解决方案。

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期刊名称 Scientific Reports
作者
Hamid Farrokhi; Thazhe Madam Rohith; Jeeranan Boonruangkan; Seunghwoi Han; Hyunwoong Kim; Seung-Woo Kim; Young-Jin Kim;
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年(卷),期 -1(7),-1
年度 -1
页码 15318
总页数 8
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1. High-brightness laser imaging with tunable speckle reduction enabled by electroactive micro-optic diffusers [J] . Hamid Farrokhi, Thazhe Madam Rohith, Jeeranan Boonruangkan, Scientific reports. . 2017,第1期

机译：高亮度激光成像，可通过电活性微型光学漫射器实现可调散斑减少
2. Speckle reduction with fast electrically tunable lens and holographic diffusers in a laser projector [J] . Optics Communications: A Journal Devoted to the Rapid Publication of Short Contributions in the Field of Optics and Interaction of Light with Matter . 2020,第期

机译：用快速电动透镜和激光投影仪中的全息漫射器减少
3. Use of diffuse reflections in tunable diode laser absorption spectroscopy: implications of laser speckle for gas absorption measurements [J] . D. MASIYANO, J. HODGKINSON, R.P. TATAM Applied physics . 2008,第2期

机译：在可调谐二极管激光吸收光谱中使用漫反射：激光散斑对气体吸收测量的影响
4. Spatial coherence reduction for speckle free imaging using electroactive rotational optical diffusers [C] . Thazhe Madam Rohith, Hamid Farrokhi, Jeeranan Boonruangkan, Conference on Lasers and Electro-Optics Pacific Rim . 2017

机译：使用电活性旋转光学扩散器减少空间相干性以实现无斑点成像
5. Tunable high-power high-brightness vertical-external-cavity surface-emitting lasers and their applications. [D] . Fan, Li. 2006

机译：可调谐大功率高亮度垂直外腔面发射激光器及其应用。
6. Non-moving Hadamard matrix diffusers for speckle reduction in laser pico-projectors [O] . Weston Thomas, Christopher Middlebrook -1

机译：非移动式Hadamard矩阵扩散器用于减少激光微投影仪中的斑点
7. HIT Poster session 1P154Preclinical diastolic dysfunction is related to impaired endothelial function in patients with chronic kidney diseaseP155Early detection of left atrial and left ventricular abnormalities in hypertensive and obese womenP156Right ventricle preserved systolic function irrespective of right ventricular hypertrophy and disease severity in anderson fabry diseaseP157Left atrial volume and function in patients undergoing percutaneous mitral valve repairP158Impact of left ventricular dysfunction on outcomes of patients undergoing direct TAVI with a self-expanding bioprosthesisP159Anatomic Doppler spectrum – retrospective spectral tissue Doppler from ultra high frame rate tissue Doppler imaging for evaluation of tissue deformationP160Phasic dynamics of ischaemic mitral regurgitation after primary coronary intervention in acute myocardial infarction: serial echocardiographic assessment from emergency room to long-term follow-upP161Reproducibility of 3DE RV volumes - novel insights at a regional levelP162Pulmonary vascular capacitance as assessed by echocardiography in pulmonary arterial hypertensionP163Three-dimensional endocardial area strain: a novel parameter for quantitative assessment of global left ventricular systolic functionP164Role of exercise hemodynamics assessed by echocardiography on symptom reduction after MitraClipP165Early identification of ventricular dysfunction in patients with juvenile systemic sclerosisP166Heart failure with and without preserved ejection fraction - the role of biomarkers in the aspect of global longitudinal strainP167Complex systolic deformation of aortic root: insights from two dimensional speckle tracking imageP168Volumetric and deformational imaging usind 2d strain and 3d echocardiography in patients with pulmonary hypertensionP169Influence of pressure load and right ventricular morphology and function on tricuspid regurgitation in pulmonary arterial hypertensionP170Left ventricular myocardial diastolic deformation analysis by 2D speckle tracking echocardiography and relationship with conventional diastolic parameters in chronic aortic regurgitationP171Extracellular volume, and not native T1 time, distinguishes diffuse fibrosis in dilated or hypertrophic cardiomyopathy at 3TP172Left atrial strain is significantly reduced in arterial hypertensionP173Symptomatic severe secondary mitral regurgitation: LV enddiastolic diameter (LVEDD) as preferable parameter for risk stratificationP174Left ventricular mechanics in isolated left bundle branch block at rest and when exercising: exploration of the concept of conductive cardiomyopathyP175Assessment of myocardial scar by 2D contrast echocardiographyP176Chronic pericarditis - expression of a rare disease: Erdheim Chester diseaseP177Aortic arch mechanics with two-dimensional speckle tracking echocardiography to estimate the left ventricular remodelling in hypertensive patientsP178Strain analysis by tissue doppler imaging: comparison of conventional manual measurement with a semi-automated approachP179Distribution of extravascular lung water in heart failure patients assessed by lung ultrasoudP180Surrogate markers for obstructive coronary artery diseaseP181LA deformation and LV longitudinal strain by two-dimensional speckle tracking echocardiography as predictors of postoperative AF development after aortic valve replacement in ASP182Left ventricular diastolic dysfunction in type 2 diabetic patients with non alcoholic fatty liver diseaseP183Myocardial strain by speckle-tracking and evaluation of 3D ejection fraction in drug-induced cardiotoxicity's approach in breast cancer [O] . AB Gevaert, A Borizanova, F Graziani, 2015

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8. DIAL with heterodyne detection including speckle noise: Aircraft/shuttle measurements of O3, H2O, and NH3 with pulsed tunable CO2 lasers [R] . Brockman, P., Hess, R. V., Staton, L. D., 1980

机译：具有外差检测的DIaL，包括散斑噪声：使用脉冲可调谐CO2激光器测量O3，H2O和NH3的飞机/梭子

High-brightness laser imaging with tunable speckle reduction enabled by electroactive micro-optic diffusers

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