Optical methods for measuring the feature size of optical diffraction gratings with nano-meter accuracy and implementation of suitable feedback control loops [PDF]
EPJ 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
Photonics, 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
Concept, manufacturing and challenges of ultra-compact snapshot multi-spectral multi-aperture imaging systems [PDF]
EPJ 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
Applied Fourier Programming for metrological control of printing materials of packaging products
Технологія 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
Terahertz optoacoustic detection of aqueous salt solutions
iScience, 2022 Summary: Terahertz radiation has been used to detect aqueous salt solutions; however, strong absorption of water in terahertz regime limits the application of traditional terahertz techniques.
Liwen Jiang +6 more
doaj +1 more source
Metasurface-enabled three-in-one nanoprints by multifunctional manipulations of light
iScience, 2021 Summary: In metasurface-based ultra-compact image display, color-nanoprints, gray-imaging elements, and binary-pattern-imaging elements are three different types of nanoprints, implemented with different mechanisms of light manipulation.
Zile Li +6 more
doaj +1 more source
Curcuma longa-Based Optical Sensor for Hydrochloric Acid and Ammonia Vapor Detection
Sensors, 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
Sparse Mid-Infrared Spectra Enable Real-time and In-vivo Applications in Tissue Discrimination [PDF]
EPJ 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
Sensors, 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
Irradiance tailoring with multiple sources using B-spline refinement [PDF]
EPJ 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