Speckle noise reduction strategies in laser-based projection imaging, fluorescence microscopy, and digital holography with uniform illumination, improved image …

V Kumar, AK Dubey, M Gupta, V Singh, A Butola… - Optics & laser …, 2021 - Elsevier
There has been immense advancement in laser-based projection imaging, fluorescence
microscopy, single-molecule localization nanoscopy, and digital holography. These …

Review on speckle-based spectrum analyzer

Y Wan, X Fan, Z He - Photonic Sensors, 2021 - Springer
Accurate spectral measurement and wavelength determination are fundamental and vital for
many fields. A compact spectrum analyzer with high performance is expected to meet the …

Laser speckle reduction by multimode optical fiber bundle with combined temporal, spatial, and angular diversity

DS Mehta, DN Naik, RK Singh, M Takeda - Applied optics, 2012 - opg.optica.org
We report significant speckle reduction in a laser illumination system using a vibrating
multimode optical fiber bundle. The optical fiber bundle was illuminated by two independent …

Speckle free efficient light engine for high power laser projectors and automobile headlamps

V Kumar, AK Dubey, M Gupta, DS Mehta - Optics & Laser Technology, 2022 - Elsevier
Laser speckles and spurious fringes are the major obstacles in the development of
emerging technologies relating to laser-based projection imaging and illumination. It …

Flexible and lightweight speckle noise suppression module based on generation of dynamic speckles with multimode fiber and macro fiber composite

Q Gao, Z Tong, Y Ma, M Wang, S Jia, X Chen - Optics & Laser Technology, 2020 - Elsevier
We propose a flexible and lightweight laser speckle noise suppression module based on the
combination of a multimode fiber (MMF) and a macro fiber composite (MFC). The …

计算重构光谱分析仪研究进展

万阳阳, 樊昕昱, 何祖源 - 应用科学学报, 2021 - jas.shu.edu.cn
光谱测量广泛应用于科学研究及工业生产中, 而传统光谱仪因体积庞大难以满足众多应用需求.
近年来, 快速发展的计算重构光谱分析仪因其具有紧凑小巧, 高分辨率和大测量带宽等优势而 …

Laser speckle reduction based on angular diversity induced by Piezoelectric Benders

G Ouyang, MN Akram, K Wang… - Journal of the …, 2013 - jeos.edpsciences.org
Speckle reduction techniques have been investigated in display systems with coherent light
sources. We propose a simple but efficient method to reduce speckle via two fast vibrating …

[HTML][HTML] Record-High Efficiency Speckle Suppression in Multimode Fibers Using Cascaded Cylindrical Piezoelectric Ceramics

N Yang, Z Li, F Li, T Lang, X Guan - Photonics, 2024 - mdpi.com
We present a technique that utilizes cascaded resonant cylindrical piezoelectric ceramics
and multimode optical fibers wound around them to effectively mitigate laser speckle. By …

Theoretical and experimental investigations on speckle suppression of dual-wavelength imaging LiDAR by vibrating the multimode fiber

X Zhou, J Sun, P Jiang, Q Wang - Measurement, 2022 - Elsevier
The multimode fiber (MMF) can be adopted to the fiber-coupling laser transmitting optics
system of the array-imaging LiDAR for far-range detection due to the relatively high demand …

Energy calibration of integrated path differential absorption lidars

A Fix, M Quatrevalet, A Amediek, M Wirth - Applied Optics, 2018 - opg.optica.org
The stringent requirements for energy reference measurement represent a challenging task
for integrated path differential absorption lidars to measure greenhouse gas columns from …