Results 31 to 40 of about 58,517 (295)

Study on Two-Dimensional Exit Pupil Expansion for Diffractive Waveguide Based on Holographic Volume Grating

open access: yesApplied Sciences, 2023
Diffraction gratings are becoming a preferred option for waveguide head-mounted in–out coupling devices due to their flexible optical properties and small size and light weight.
Mianhui Weng   +3 more
doaj   +1 more source

A Treatise on Physical Optics [PDF]

open access: yesNature, 1892
A NEW treatise on the higher branches of physical optics must be welcome to all who are interested in the subject. Mr. Basset explains in the preface the scope and aim of his book, and it is needless to say that he performs the task he has set himself with ability and success.
openaire   +3 more sources

A Mid-Infrared Quantum Cascade Laser Ultra-Sensitive Trace Formaldehyde Detection System Based on Improved Dual-Incidence Multipass Gas Cell

open access: yesSensors, 2023
Formaldehyde (HCHO) is a tracer of volatile organic compounds (VOCs), and its concentration has gradually decreased with the reduction in VOC emissions in recent years, which puts forward higher requirements for the detection of trace HCHO.
Tao Wu   +9 more
doaj   +1 more source

Simulation Analysis of a Wavefront Reconstruction of a Large Aperture Laser Beam

open access: yesSensors, 2023
In order to solve the problem of atmospheric influence on the far-field measurement of the quality of a laser beam, we proposed a direct wavefront measurement system based on the Hartmann detection principle, which can measure large apertures and high ...
Gangyu Wang   +4 more
doaj   +1 more source

Blind Restoration of Images Distorted by Atmospheric Turbulence Based on Deep Transfer Learning

open access: yesPhotonics, 2022
Removing space-time varying blur and geometric distortions simultaneously from an image is a challenging task. Recent methods (including physical-based methods or learning-based methods) commonly default the turbulence-degraded operator as a fixed ...
Yiming Guo   +5 more
doaj   +1 more source

Formation and Optical Properties of Ag Nanoparticles in CaB4O7–Ag2O and CaB4O7–Gd2O3–Ag2O Tetraborate Glasses [PDF]

open access: yesЖурнал нано- та електронної фізики, 2014
Formation of Ag nanoparticles (NPs) in the near-surface layer of CaB4O7–Ag2O and CaB4O7 –Gd2O3–Ag2O glasses by annealing in vacuum or in air is reported.
V.T. Adamiv   +4 more
doaj  

Analysis and Correction of Smeared Image From Interline-Transfer CCD in Beam Quality Measurement

open access: yesIEEE Photonics Journal, 2022
The smear effect caused by light penetration of interline-transfer (IT) CCD in beam quality measurement (BQM) is detrimental and not analyzed pertinently. This report proposes a mathematical model and a correction method for the smeared image.
Jie Luo   +6 more
doaj   +1 more source

Simulation of Compact Spaceborne Lidar with High-Repetition-Rate Laser for Cloud and Aerosol Detection under Different Atmospheric Conditions

open access: yesRemote Sensing, 2023
To provide references for the design of the lab’s upcoming prototype of the compact spaceborne lidar with a high-repetition-rate laser (CSLHRL), in this paper, the detection signal of spaceborne lidar was simulated by the measured signal of ground-based ...
Jie Ji   +6 more
doaj   +1 more source

B cell mechanobiology in health and disease: emerging techniques and insights into therapeutic responses

open access: yesFEBS Letters, EarlyView.
B cells sense external mechanical forces and convert them into biochemical signals through mechanotransduction. Understanding how malignant B cells respond to physical stimuli represents a groundbreaking area of research. This review examines the key mechano‐related molecules and pathways in B lymphocytes, highlights the most relevant techniques to ...
Marta Sampietro   +2 more
wiley   +1 more source

First Retrieval of Total Ozone Columns from EMI-2 Using the DOAS Method

open access: yesRemote Sensing, 2023
The Environmental Trace Gases Monitoring Instrument 2 (EMI-2), a second-generation Chinese hyperspectral satellite-based spectrometer, was launched on 7 September 2021.
Yuanyuan Qian   +5 more
doaj   +1 more source

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