scholarly journals Feasibility Demonstration of Wide-Field Fourier-Spectroscopic-Imaging in Infrared Region

2011 ◽  
Vol 19 ◽  
pp. 76-81 ◽  
Author(s):  
Wei Qi ◽  
Takashi Takuma ◽  
Ryosuke Tsutsumi ◽  
Asuka Inui ◽  
Hiroyasu Kagiyama ◽  
...  
Keyword(s):  
Spectroscopic Imaging ◽  
Infrared Region ◽  
Wide Field

scholarly journals Wide-field Raman spectroscopic imaging with frequency modulation based spatially encoded light illumination

AIP Advances ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 095012
Author(s):  
Shenghan Ren ◽  
Tianyu Yan ◽  
Lin Wang ◽  
Nan Wang ◽  
Jimin Liang ◽  
...  
Keyword(s):  
Frequency Modulation ◽  
Spectroscopic Imaging ◽  
Light Illumination ◽  
Wide Field ◽  
Raman Spectroscopic

scholarly journals Aluminium oxide in the atmosphere of hot Jupiter WASP-43b

2020 ◽  
Vol 639 ◽  
pp. A3 ◽  
Author(s):  
Katy L. Chubb ◽  
Michiel Min ◽  
Yui Kawashima ◽  
Christiane Helling ◽  
Ingo Waldmann
Keyword(s):  
Direct Evidence ◽  
Statistical Significance ◽  
Infrared Region ◽  
Atmospheric Dynamics ◽  
Wide Field ◽  
Space Telescope ◽  
Transmission Data ◽  
Data Points ◽  
High Level ◽  
Hot Jupiter

We have conducted a re-analysis of publicly available Hubble Space Telescope Wide Field Camera 3 (HST WFC3) transmission data for the hot-Jupiter exoplanet WASP-43b, using the Bayesian retrieval package Tau-REx. We report evidence of AlO in transmission to a high level of statistical significance (>5σ in comparison to a flat model, and 3.4σ in comparison to a model with H2O only). We find no evidence of the presence of CO, CO2, or CH4 based on the available HST WFC3 data or on Spitzer IRAC data. We demonstrate that AlO is the molecule that fits the data to the highest level of confidence out of all molecules for which high-temperature opacity data currently exists in the infrared region covered by the HST WFC3 instrument, and that the subsequent inclusion of Spitzer IRAC data points in our retrieval further supports the presence of AlO. H2O is the only other molecule we find to be statistically significant in this region. AlO is not expected from the equilibrium chemistry at the temperatures and pressures of the atmospheric layer that is being probed by the observed data. Its presence therefore implies direct evidence of some disequilibrium processes with links to atmospheric dynamics. Implications for future study using instruments such as the James Webb Space Telescope are discussed, along with future opacity needs. Comparisons are made with previous studies into WASP-43b.

Fast wide-field Raman spectroscopic imaging based on simultaneous multi-channel image acquisition and Wiener estimation

2016 ◽  
Vol 41 (12) ◽  
pp. 2783 ◽  
Author(s):  
Dong Wei ◽  
Shuo Chen ◽  
Yi Hong Ong ◽  
Clint Perlaki ◽  
Quan Liu
Keyword(s):  
Image Acquisition ◽  
Spectroscopic Imaging ◽  
Wide Field ◽  
Raman Spectroscopic ◽  
Wiener Estimation ◽  
Channel Image

Recent Advances in Spontaneous Raman Spectroscopic Imaging: Instrumentation and Applications

2020 ◽  
Vol 27 (36) ◽  
pp. 6188-6207
Author(s):  
Nan Wang ◽  
Honghao Cao ◽  
Lin Wang ◽  
Feng Ren ◽  
Qi Zeng ◽  
...  
Keyword(s):  
Medicinal Chemistry ◽  
Spectroscopic Imaging ◽  
Chemical Imaging ◽  
High Spectral Resolution ◽  
Chemical Information ◽  
Wide Field ◽  
Scanning Method ◽  
Raman Spectroscopic ◽  
Recent Advances ◽  
Line Scanning

Background: Spectroscopic imaging based on the spontaneous Raman scattering effects can provide unique fingerprint information in relation to the vibration bands of molecules. Due to its advantages of high chemical specificity, non-invasive detection capability, low sensitivity to water, and no special sample pretreatment, Raman Spectroscopic Imaging (RSI) has become an invaluable tool in the field of biomedicine and medicinal chemistry. Methods: There are three methods to implement RSI, including point scanning, line scanning and wide-field RSI. Point-scanning can achieve two-and three-dimensional imaging of target samples. High spectral resolution, full spectral range and confocal features render this technique highly attractive. However, point scanning based RSI is a time-consuming process that can take several hours to map a small area. Line scanning RSI is an extension of point scanning method, with an imaging speed being 300-600 times faster. In the wide-field RSI, the laser illuminates the entire region of interest directly and all the images then collected for analysis. In general, it enables more accurate chemical imaging at faster speeds. Results: This review focuses on the recent advances in RSI, with particular emphasis on the latest developments on instrumentation and the related applications in biomedicine and medicinal chemistry. Finally, we prospect the development trend of RSI as well as its potential to translation from bench to bedside. Conclusion: RSI is a powerful technique that provides unique chemical information, with a great potential in the fields of biomedicine and medicinal chemistry.

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