Results 1 to 10 of about 452,673 (185)

Optical methods for measuring the feature size of optical diffraction gratings with nano-meter accuracy and implementation of suitable feedback control loops [PDF]

open access: yesEPJ Web of Conferences, 2022
Surface relief diffraction gratings offer a high flexibility in their design and thus allow to synchronize their optical performance with the specific requirements of the underlying application.
Flügel-Paul Thomas   +4 more
doaj   +1 more source

Concept, manufacturing and challenges of ultra-compact snapshot multi-spectral multi-aperture imaging systems [PDF]

open access: yesEPJ Web of Conferences, 2022
Snapshot multispectral imaging is a rising non-invasive and contact-free analysis method and technology to discriminate or identify objects based on their spectral characteristics.
Hubold Martin   +4 more
doaj   +1 more source

Real-Time Chlorophyll-a Pigment Monitoring of Chlamydomonas reinhardtii in a Controlled Environment Using Pulsed LED Fluorescence LiDAR System

open access: yesPhotonics, 2023
The real-time chlorophyll-a pigment monitoring of C. reinhardtii is studied using our developed LED fluorescence light detection and ranging (LiDAR) system.
Jumar G. Cadondon   +3 more
doaj   +1 more source

Applied Fourier Programming for metrological control of printing materials of packaging products

open access: yesТехнологія і техніка друкарства, 2022
In our manuscript, the materials of analytical substantiation and experimental verification of a new method of digital Fourier processing of polarization images of optically anisotropic polymer layers are presented.
Артем Олегович Карачевцев   +7 more
doaj   +1 more source

Irradiance tailoring with multiple sources using B-spline refinement [PDF]

open access: yesEPJ Web of Conferences, 2022
To increase the irradiance generated by an illumination system, multiple sub-systems, each generating their own irradiance distribution can be used.
Heemels Alexander   +2 more
doaj   +1 more source

Sparse Mid-Infrared Spectra Enable Real-time and In-vivo Applications in Tissue Discrimination [PDF]

open access: yesEPJ Web of Conferences, 2022
Differentiation of malign and benign tissue based on spectral information can be done by only using a small fractional amount of the original mid-infrared spectrum.
Fischer Felix   +2 more
doaj   +1 more source

Gold-viral particle identification by deep learning in wide-field photon scattering parametric images [PDF]

open access: yes, 2022
The ability to identify virus particles is important for research and clinical applications. Because of the optical diffraction limit, conventional optical microscopes are generally not suitable for virus particle detection, and higher resolution ...
Dong, L.   +25 more
core   +1 more source

Chlorophyll-a Pigment Measurement of Spirulina in Algal Growth Monitoring Using Portable Pulsed LED Fluorescence Lidar System

open access: yesSensors, 2022
Chlorophyll-a measurement is important in algal growth and water quality monitoring in natural waters. A portable pulsed LED fluorescence lidar system based on the preliminary algal organic matter and pigments excitation–emission matrix (EEM) of ...
Jumar G. Cadondon   +4 more
doaj   +1 more source

Curcuma longa-Based Optical Sensor for Hydrochloric Acid and Ammonia Vapor Detection

open access: yesSensors, 2023
In this research, we present a prototype optical system that offers significant advances in detecting hydrochloric acid (HCl) and ammonia (NH3) vapors.
A. Sánchez Juárez   +5 more
doaj   +1 more source

Light Scattering from Contamination and Defects - Measurement, Analysis, and Modelling [PDF]

open access: yesEPJ Web of Conferences, 2022
Light scattering induced by contamination and defects on optical components can quickly limit the component’s performance. Therefore, imperfection analysis and budgeting are mandatory - but also challenging tasks.
Tobias Herffurth   +3 more
doaj   +1 more source

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