Results 1 to 10 of about 165,731 (141)

Scalable miniature on-chip Fourier transform spectrometer for Raman spectroscopy [PDF]

Light: Science & Applications
Miniaturized spectrometers for Raman spectroscopy have the potential to open up a new chapter in sensing. Raman spectroscopy is essential for material characterization and biomedical diagnostics, however, its weak signal and the need for sub-nanometer ...
Sarp Kerman, Xiao Luo, Zuoqin Ding, Zhewei Zhang, Zhuo Deng, Xiaofei Qin, Yuran Xu, Shuhua Zhai, Chang Chen   +8 more
doaj   +2 more sources

Miniaturised visible and near-infrared spectrometers for assessing soil health indicators in mine site rehabilitation [PDF]

SOIL, 2022
Mining can cause severe disturbances to the soil, which underpins the viability of terrestrial ecosystems. Post-mining rehabilitation relies on measuring soil properties that are critical indicators of soil health.
Z. Shen, H. D'Agui, L. Walden, M. Zhang, T. M. Yiu, K. Dixon, P. Nevill, P. Nevill, A. Cross, A. Cross, M. Matangulu, Y. Hu, R. A. Viscarra Rossel   +12 more
doaj   +1 more source

Use of Raman Spectroscopy, Scanning Electron Microscopy and Energy Dispersive X-ray Spectroscopy in a Multi-Technique Approach for Physical Characterization of Purple Urine Bag Syndrome

Applied Sciences, 2022
Purple urine bag syndrome (PUBS) is a rare condition characterized by purple discoloration of urine and urine bags. Although it is benign, it represents an alarming symptom to the patients and their relatives because of purple discoloration.
Giuseppe Acri, Carlo Sansotta, Francesca Maria Salmeri, Marco Romeo, Elisa V. Ruello, Lucia Denaro, Barbara Testagrossa   +6 more
doaj   +1 more source

A von Hámos spectrometer for diamond anvil cell experiments at the High Energy Density Instrument of the European X-ray Free-Electron Laser

Journal of Synchrotron Radiation, 2023
A von Hámos spectrometer has been implemented in the vacuum interaction chamber 1 of the High Energy Density instrument at the European X-ray Free-Electron Laser facility.
Johannes M. Kaa, Zuzana Konôpková, Thomas R. Preston, Valerio Cerantola, Christoph J. Sahle, Mirko Förster, Christian Albers, Lélia Libon, Robin Sakrowski, Lennart Wollenweber, Khachiwan Buakor, Anand Dwivedi, Mikhail Mishchenko, Motoaki Nakatsutsumi, Christian Plückthun, Jan-Patrick Schwinkendorf, Georg Spiekermann, Nicola Thiering, Sylvain Petitgirard, Metin Tolan, Max Wilke, Ulf Zastrau, Karen Appel, Christian Sternemann   +23 more
doaj   +1 more source

Impact of Spectral Resolution and Signal-to-Noise Ratio in Vis–NIR Spectrometry on Soil Organic Matter Estimation

Remote Sensing, 2023
Recently, considerable efforts have been devoted to the estimation of soil properties using optical payloads mounted on drones or satellites. Nevertheless, many studies focus on diverse pretreatments and modeling techniques, while there continues to be a
Bo Yu, Jing Yuan, Changxiang Yan, Jiawei Xu, Chaoran Ma, Hu Dai   +5 more
doaj   +1 more source

Advances in cost-effective integrated spectrometers

Light: Science & Applications, 2022
The proliferation of Internet-of-Things has promoted a wide variety of emerging applications that require compact, lightweight, and low-cost optical spectrometers.
Ang Li, Chunhui Yao, Junfei Xia, Huijie Wang, Qixiang Cheng, Richard Penty, Yeshaiahu Fainman, Shilong Pan   +7 more
doaj   +1 more source

Computational spectrometers enabled by nanophotonics and deep learning

Nanophotonics, 2022
A new type of spectrometer that heavily relies on computational technique to recover spectral information is introduced. They are different from conventional optical spectrometers in many important aspects.
Gao Li, Qu Yurui, Wang Lianhui, Yu Zongfu   +3 more
doaj   +1 more source

Precise Blaze Angle Adjustment of Echelle Grating by Self-Shadowing Rotating Mask

IEEE Photonics Journal, 2018
Angular precision of 0.1° for the blaze angle of echelle gratings is an important technical requirement for spectral instruments with echelle gratings.
Bin Sheng, Jiaojiao Fan, Yuanshen Huang, Junjun Guo, Haoyu Lyu, Dawei Zhang, Songlin Zhuang   +6 more
doaj   +1 more source

Visible to long-wave infrared chip-scale spectrometers based on photodetectors with tailored responsivities and multispectral filters

Nanophotonics, 2020
Chip-scale microspectrometers, operational across the visible to long-wave infrared spectral region will enable many remote sensing spectroscopy applications in a variety of fields including consumer electronics, process control in manufacturing, as well
Cadusch Jasper J., Meng Jiajun, Craig Benjamin J., Shrestha Vivek Raj, Crozier Kenneth B.   +4 more
doaj   +1 more source

An integrated single-shot spectrometer with large bandwidth-resolution ratio and wide operation temperature range

PhotoniX, 2023
There has been a rapidly growing demand for low-cost, integrated single-shot spectrometers to be embedded in portable intelligent devices. Even though significant progress has been made in this area, two major problems are still remaining, namely the ...
Ang Li, Chang Wang, Feixia Bao, Wenji Fang, Yuxin Liang, Rui Cheng, Shilong Pan   +6 more
doaj   +1 more source