Results 31 to 40 of about 1,260,020 (249)
Gas cells for tunable diode laser absorption spectroscopy employing optical diffusers. Part 1: single and dual pass cells [PDF]
, 2010 New designs for gas cells are presented that incorporate transmissive or reflective optical diffusers. These components offer simple alignment and can disrupt the formation of optical etalons. We analyse the performance-limiting effects in these cells
Hodgkinson, Jane +2 more
core +1 more source
Defect detection during laser welding by Laser Speckle Photometry
, 2022 Paper 108340W, 10 S.The modular design of steam turbines requires the welding of individual rotor discs to the finished single rotor. Conventional welding technology is very complex.
Stüwe, Tobias +3 more
core +1 more source
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2015 Nano/micro scale surface structure on precision machined parts dominates the various product functions such as friction, wear resistance, corrosion, fatigue, and wetting.
Motochika SHIMIZU +3 more
doaj +1 more source
Enhancement of microvessel in laser speckle image using gaussian kernel template [PDF]
Journal of Innovative Optical Health Sciences, 2019 Laser speckle contrast imaging (LSCI) is an optical imaging method, which can monitor microvascular flow variation directly without addition of any ectogenous dye.
Yameng Zhang +4 more
doaj +1 more source
Line Scan Spatial Speckle Contrast Imaging and Its Application in Blood Flow Imaging
Applied Sciences, 2021 Laser speckle imaging has been an indispensable tool for visualizing blood flow in biomedical applications. We proposed a novel design of the laser speckle imaging system, which combines confocal illumination and detection with various speckle analysis ...
E Du +3 more
doaj +1 more source
Objective speckle velocimetry for autonomous vehicle odometry [PDF]
, 2012 Speckle velocimetry is investigated as a means of determining odometry data with potential for application on autonomous robotic vehicles. The technique described here relies on the integration of translation measurements made by normalized cross ...
Charrett, Thomas O. H. +3 more
core +1 more source
IEEE Access, 2019 We study laser speckle reduction by light pipes, and we propose a new method to improve its efficiency. Proof-of-concept refractive optical elements (ROEs) with a staircase-like structure are introduced before a holographic diffuser to split a laser beam
Zhaomin Tong +5 more
doaj +1 more source
Tools for classification of growing/non-growing bacterial colonies using laser speckle imaging
Frontiers in Microbiology, 2023 Prior research has indicated the feasibility of assessing growth—associated activity in bacterial colonies through the application of laser speckle imaging techniques.
Ilya Balmages +8 more
doaj +1 more source
IEEE Photonics Journal, 2015 We report on the implementation of a current drive modulation circuitry that is effective in suppressing speckle noise for laser diodes. The drive circuit allows for operating the laser diode current at constant dc or modulating the current with square ...
I. Yilmazlar, M. Sabuncu
doaj +1 more source
APL Photonics, 2023 Semiconductor lasers with optical feedback are stochastic nonlinear systems that can display complex dynamics and abrupt changes when their operation conditions change.
Giulio Tirabassi +3 more
doaj +1 more source