Results 11 to 20 of about 270 (136)

Alignment and study of prototypes of the Offner hyperspectrometer

Вестник Самарского университета: Аэрокосмическая техника, технологии и машиностроение, 2016
A prototype of the hyperspectrometer based on the Offner scheme has been tested. Drawings have been produced and the main mirror elements of the hyperspectrometer including diffraction grating on a convex spherical surface have been fabricated.
S. V. Karpeev, S. N. Khonina, A. R. Murdagulov, M. V. Petrov   +3 more
doaj   +3 more sources

Modeling of arrangement tolerances for the optical elements in a spaceborne Offner imaging hyperspectrometer [PDF]

Компьютерная оптика, 2018
We propose mathematical tools and analyze the quality of an image in the detection plane of an Offner imaging hyperspectrometer, evaluating conditional tolerances for the position of the spectrometer elements. The results of modeling of a combined effect
Andrey Rastorguev, Sergey Kharitonov, Nikolay Kazanskiy   +2 more
doaj   +2 more sources

Numerical simulation of the performance of a spaceborne Offner imaging hyperspectrometer in the wave optics approximation

Компьютерная оптика, 2022
We propose a method for calculating the point scattering function (PSF) of an Offner imaging hyperspectrometer with a diffraction grating in the approximation of scalar diffraction theory.
A.A. Rastorguev, S.I. Kharitonov, N.L. Kazanskiy   +2 more
doaj   +2 more sources

Laboratory model of microwave hyperspectrometer for internal radiation researches of layered natural mediums

Қарағанды университетінің хабаршысы. Физика сериясы, 2020
This paper describes an achieved result in designing of the four-receiver microwave hyperspectrometer based on zero measurement method and the multi-receiver concept of realization.
А.В. Убайчин, А.П. Суржиков, O. Стары, А.К. Хасенов, Д.Ж. Карабекова   +4 more
doaj   +2 more sources

Extraction and Dyeing Techniques of Traditional Vegetable Dyestuffs.

Int J Anal Chem, 2022
In order to explore the influencing factors of the extraction of vegetable dyes, a research method for the extraction and dyeing of traditional vegetable dyes was proposed. In this paper, the effects of extraction temperature, extraction time, and the ratio of solid to liquid on the extraction effect were discussed through orthogonal experiments.
Li G.
europepmc   +2 more sources

Emerging clinical applications in oncology for non‐invasive multi‐ and hyperspectral imaging of cell and tissue autofluorescence

Journal of Biophotonics, Volume 16, Issue 9, September 2023., 2023
Hyperspectral and multispectral imaging of cell and tissue autofluorescence employs fluorescence imaging, without exogenous fluorophores, across multiple excitation/emission combinations. This technology can enable the non‐invasive, stain‐free characterisation of cells and tissues, and has shown great promise for advancing tumour diagnosis and surgical
Jared M. Campbell, Abbas Habibalahi, Shannon Handley, Adnan Agha, Saabah B. Mahbub, Ayad G. Anwer, Ewa M. Goldys   +6 more
wiley   +1 more source

Method for detecting the pollution degree of naturally contaminated insulator based on hyperspectral characteristics

High Voltage, Volume 6, Issue 6, Page 1031-1039, December 2021., 2021
Abstract Insulator pollution degree detection is of great significance for preventing a flashover. Equivalent salt deposit density, leakage current, and surface pollution layer conductivity are commonly used to describe insulator pollution degree; however, all these parameters have limitations in field application and real‐time monitoring.
Chengfeng Yin, Zhang Xiao, Yujun Guo, Chaoqun Shi, Xueqin Zhang, Guangning Wu   +5 more
wiley   +1 more source

Multispectral imaging and hyperspectral scanning of the first dissection of core 73002: Preliminary results

Meteoritics &Planetary Science, Volume 56, Issue 8, Page 1574-1584, August 2021., 2021
Abstract We measured the multispectral images and a hyperspectral profile during the first dissection pass of core 73002, and here, we present preliminary results. Both multispectral images and hyperspectral data show systematic darkening and reddening from bottom to top of the core, indicating an increasing maturity from the subsurface to surface ...
Lingzhi Sun, Paul G. Lucey, Abigail Flom, Chiara Ferrari‐Wong, Ryan A. Zeigler, Juliane Gross, Noah E. Petro, Charles K. Shearer, Francis M. McCubbin, The ANGSA Science Team, Edward Cloutis   +10 more
wiley   +1 more source

Efficiency of the Photoluminescent Method for Monitoring the Homogeneity of Feed Mixtures in Animal Husbandry [PDF]

, 2022
The spectral evaluation systems for controlling the feed mixtures homogeneity were analyzed. (Research purpose) To study the optical luminescent properties of the feed mixtures main components in the ultraviolet and visible range and develop a method for
E. A. Nikitin, I. Yu. Efremenkov, M. V. Belyakov   +2 more
core   +5 more sources

Experimental determination of soil moisture on hyperspectral images [PDF]

Компьютерная оптика, 2018
The possibility of humidity determination based on the use of spectral distributions in the wavelength range of up to 1 µm is analyzed. We discuss the use of an imaging hyperspectrometer for precision farming.
Vladimir Podlipnov, Vyacheslav Shchedrin, Alexandr Babichev, Sergey Vasilyev, Veronika Blank   +4 more
doaj   +1 more source