Performance of near-infrared InGaAs focal plane array with different series resistances to p-InP layer

2014 ◽  
Author(s):  
Xiumei Shao ◽  
Xue Li ◽  
Tao Li ◽  
Zhangcheng Huang ◽  
Yu Chen ◽  
...  
Keyword(s):  
Focal Plane ◽  
Near Infrared ◽  
Focal Plane Array

Room temperature 640x512 pixel near-infrared InGaAs focal plane array

2000 ◽  
Author(s):  
Martin H. Ettenberg ◽  
Michael J. Lange ◽  
Matthew T. O'Grady ◽  
Jacobus S. Vermaak ◽  
Marshall J. Cohen ◽  
...  
Keyword(s):  
Focal Plane ◽  
Room Temperature ◽  
Near Infrared ◽  
Focal Plane Array

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.

scholarly journals Extending the Detection Limit for Near Infrared Spectroscopic Measurements of Heterogeneous Solids Using Focal Plane Array Detectors

2003 ◽  
Vol 9 (S02) ◽  
pp. 1076-1077
Author(s):  
E. Neil Lewis ◽  
Eunah Lee ◽  
Linda H. Kidder ◽  
Everett H. Jefferson ◽  
Christopher D. Ellison ◽  
...  
Keyword(s):  
Detection Limit ◽  
Focal Plane ◽  
Near Infrared ◽  
Focal Plane Array ◽  
Heterogeneous Solids ◽  
Spectroscopic Measurements ◽  
Array Detectors ◽  
Infrared Spectroscopic

scholarly journals Okayama Astrophysical Observatory Wide-Field Camera

2019 ◽  
Vol 71 (6) ◽  
Author(s):  
Kenshi Yanagisawa ◽  
Yasuhiro Shimizu ◽  
Kiichi Okita ◽  
Daisuke Kuroda ◽  
Hironori Tsutsui ◽  
...  
Keyword(s):  
Focal Plane ◽  
Near Infrared ◽  
Galactic Plane ◽  
Focal Plane Array ◽  
Variable Stars ◽  
Field Of View ◽  
Wide Field

Abstract We report on the development of a wide-field near-infrared (0.9–2.5$\, \mu$m) camera built as a renewal of the existing classical Cassegrain 0.91 m telescope at Okayama Astrophysical Observatory. The optics system was replaced with fast hybrid optics (f/2.5) composed of forward Cassegrain optics and quasi-Schmidt optics, which results in an effective image circle of 52 mm diameter on the focal plane. The new camera, called the Okayama Astrophysical Observatory Wide-Field Camera (OAOWFC), has imaging capabilities in the $Y$, $J$, $H$, and $K_{\rm s}$ bands over a field of view of $0.^{\!\!\!\circ }47 \times 0.^{\!\!\!\circ }47$ with a HAWAII-1 HgCdTe PACE focal plane array. The primary purpose of OAOWFC is to search for variability in the Galactic plane in the $K_{\rm s}$ band and to promptly follow up transients. We have demonstrated a photometric repeatability of 2% in the densest field in the northern Galactic plane and successfully discovered previously unreported variable stars. The observations of OAOWFC are fully autonomous, and we started scientific operations in 2015 April.

Vibrational Spectroscopic Microscopy: Raman, Near-Infrared and Mid-Infrared Imaging Techniques

1995 ◽  
Vol 1 (1) ◽  
pp. 35-46
Author(s):  
E. Neil Lewis ◽  
Ira W. Levin
Keyword(s):  
Focal Plane ◽  
Near Infrared ◽  
Imaging Techniques ◽  
Spectroscopic Imaging ◽  
Focal Plane Array ◽  
Acid Mixture ◽  
Infrared Focal Plane Array ◽  
Mid Infrared ◽  
Array Detectors ◽  
Infrared Spectral

New instrumental approaches for performing vibrational Raman, near-infrared and mid-infrared spectroscopic imaging microscopy are described. The instruments integrate imaging quality filters such as acousto-optic tunable filters (AOTFs), with visible charge-coupled device (CCD) and infrared focal-plane array detectors. These systems are used in conjunction with infinity-corrected, refractive microscopes for operation in the visible and near-infrared spectral regions and with Cassegrainian reflective optics for operation in the mid-infrared spectral interval. Chemically specific images at moderate spectral resolution (2 nm) and high spatial resolution (1 μm) can be collected rapidly and noninvasively. Image data are presented containing 128 × 128 pixels, although significantly larger format images can be collected in approximately the same time. The instruments can be readily configured for both absorption and reflectance spectroscopies. We present Raman emission images of polystyrene microspheres and a lipid/amino acid mixture and near-infrared images of onion epidermis and a hydrated phospholipid dispersion. Images generated from mid-infrared spectral data are presented for a KBr disk containing nonhomogeneous domains of lipid and for 50-μm slices of monkey cerebellum. These are the first results illustrating the use of infrared focal-plane array detectors as chemically specific spectroscopic imaging devices and demonstrating their application in biomolecular areas. Extensions and future applications of the various vibrational spectroscopic imaging techniques are discussed.

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