Fourier Transform Spectroscopic Imaging Using an Infrared Focal-Plane Array Detector

1995 ◽  
Vol 67 (19) ◽  
pp. 3377-3381 ◽  
Author(s):  
E. Neil. Lewis ◽  
Patrick J. Treado ◽  
Robert C. Reeder ◽  
Gloria M. Story ◽  
Anthony E. Dowrey ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Focal Plane ◽  
Spectroscopic Imaging ◽  
Focal Plane Array ◽  
Array Detector ◽  
Infrared Focal Plane Array

Si: As Focal-Plane Array Detection for Fourier Transform Spectroscopic Imaging in the Infrared Fingerprint Region

1997 ◽  
Vol 51 (4) ◽  
pp. 563-567 ◽  
Author(s):  
E. Neil Lewis ◽  
Linda H. Kidder ◽  
John F. Arens ◽  
Michael C. Peck ◽  
Ira W. Levin
Keyword(s):  
Fourier Transform ◽  
Focal Plane ◽  
Spectroscopic Imaging ◽  
Focal Plane Array ◽  
Array Detector ◽  
Long Wavelength ◽  
Array Detectors ◽  
Infrared Spectroscopic ◽  
Infrared Spectroscopic Imaging ◽  
Fingerprint Region

An instrument is described that simultaneously records images and spectra of materials in the infrared fingerprint region using a long-wavelength infrared focal-plane array detector, a step-scan Michelson interferometer, and an infrared microscope. With the combination of step-scan Fourier transform (FT) Michelson interferometry and arsenic-doped silicon (Si: As) focal-plane array image detection, an infrared spectroscopic imaging system has been constructed that maintains both an instrumental multiplex and multichannel advantage and operates from approximately 4000 to 400 cm−1. With this method of mid-infrared spectroscopic imaging, the fidelity of the generated spectral images recorded through the microscope is solely determined by the number of pixels on the focal-plane array detector, and only a few seconds of data acquisition time are required for spectral image acquisition. This seamless combination of spectroscopy for molecular analysis and the power of visualization represents the future of infrared microscopy. Step-scan imaging principles, the operation and characteristics of long-wavelength array detectors, and instrument design details are outlined, and infrared chemical imaging results are presented. The results are discussed with respect to their implications for the chemical analysis of a variety of solid-state materials.

Review of digital mid-wave infrared focal plane array detector assembly

2017 ◽  
Vol 46 (1) ◽  
pp. 102003
Author(s):  
白丕绩 Bai Piji ◽  
赵俊 Zhao Jun ◽  
韩福忠 Han Fuzhong ◽  
李立华 Li Lihua ◽  
王博 Wang Bo ◽  
...  
Keyword(s):  
Focal Plane ◽  
Focal Plane Array ◽  
Array Detector ◽  
Infrared Focal Plane Array ◽  
Detector Assembly

scholarly journals Focal plane array detector-based micro-Fourier-transform infrared imaging for the analysis of microplastics in environmental samples

2015 ◽  
Vol 12 (5) ◽  
pp. 563 ◽  
Author(s):  
Martin Günter Joachim Löder ◽  
Mirco Kuczera ◽  
Svenja Mintenig ◽  
Claudia Lorenz ◽  
Gunnar Gerdts
Keyword(s):  
Fourier Transform ◽  
Focal Plane ◽  
Environmental Samples ◽  
Infrared Imaging ◽  
Fourier Transform Infrared ◽  
Focal Plane Array ◽  
Particle Identification ◽  
The Arctic ◽  
Array Detector ◽  
Fourier Transform Infrared Imaging

Environmental context Microplastics are of increasing environmental concern following reports that they occur worldwide from the arctic to the deep sea. However, a reliable methodology that facilitates an automated measurement of abundance and identity of microplastics is still lacking. We present an analytical protocol that applies focal plane array detector-based infrared imaging of microplastics enriched on membrane filters applicable to investigations of microplastic pollution of the environment. Abstract The pollution of the environment with microplastics (plastic pieces <5 mm) is a problem of increasing concern. However, although this has been generally recognised by scientists and authorities, the analysis of microplastics is often done by visual inspection alone with potentially high error rates, especially for smaller particles. Methods that allow for a fast and reliable analysis of microplastics enriched on filters are lacking. Our study is the first to fill this gap by using focal plane array detector-based micro-Fourier-transform infrared imaging for analysis of microplastics from environmental samples. As a result of our iteratively optimised analytical approach (concerning filter material, measuring mode, measurement parameters and identification protocol), we were able to successfully measure the whole surface (>10-mm diameter) of filters with microplastics from marine plankton and sediment samples. The measurement with a high lateral resolution allowed for the detection of particles down to a size of 20 μm in only a fractional part of time needed for chemical mapping. The integration of three band regions facilitated the pre-selection of potential microplastics of the ten most important polymers. Subsequent to the imaging the review of the infrared spectra of the pre-selected potential microplastics was necessary for a verification of plastic polymer origin. The approach we present here is highly suitable to be implemented as a standard procedure for the analysis of small microplastics from environmental samples. However, a further automatisation with respect to measurement and subsequent particle identification would facilitate the even faster and fully automated analysis of microplastic samples.

Quantitative Determination of Pharmaceutical Drug Formulations by Near-Infrared Spectroscopic Imaging

2008 ◽  
Vol 62 (11) ◽  
pp. 1200-1208 ◽  
Author(s):  
O. Kolomiets ◽  
U. Hoffmann ◽  
P. Geladi ◽  
H. W. Siesler
Keyword(s):  
Quantitative Determination ◽  
Focal Plane ◽  
Near Infrared ◽  
Diffuse Reflection ◽  
Spectroscopic Imaging ◽  
Focal Plane Array ◽  
Drug Formulation ◽  
Array Detector ◽  
Ft Ir

Over the last decade Fourier transform infrared (FT-IR) and near-infrared (NIR) spectroscopic imaging with focal plane array (FPA) detectors have proved powerful techniques for the rapid visualization of samples by a combination of spectroscopic and spatial information. Using these methods, selected sample areas can be analyzed with reference to the identification and localization of chemical species by FT-IR spectroscopy in the transmission or attenuated total reflection (ATR) mode and by NIR spectroscopy in diffuse reflection with a lateral resolution in the micrometer range. The present communication focuses on the quantitative determination of the active ingredient composition of a solid drug formulation by NIR spectroscopic imaging with a focal plane array detector and the results obtained are compared to the quantitative data obtained by conservative light-fiber NIR spectroscopic diffuse reflection measurements with a single-element detector. The communication also addresses the issue of penetration depth of NIR radiation into the investigated solid material.

Sign in / Sign up

Export Citation Format

Share Document