Near-infrared Spectral Imaging with Focal Plane Array Detectors

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

Microscopy and Microanalysis ◽

10.1017/s1431927603445388 ◽

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

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Analysis of mineral composition by infrared spectral imaging using quantum dot focal plane array sensor

10.1117/12.2262048 ◽

2017 ◽

Cited By ~ 1

Author(s):

Chenhui Huang ◽

Tomo Tanaka ◽

Sota Kagami ◽

Yoshiki Ninomiya ◽

Masahiro Kakuda ◽

...

Keyword(s):

Quantum Dot ◽

Mineral Composition ◽

Focal Plane ◽

Spectral Imaging ◽

Focal Plane Array ◽

Array Sensor ◽

Infrared Spectral

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Near infrared spectral imaging for the field server of lettuce growth

Proceedings of the 41st SICE Annual Conference. SICE 2002. ◽

10.1109/sice.2002.1195426 ◽

2003 ◽

Cited By ~ 1

Author(s):

T. Masahiko ◽

K. Miyamoto ◽

I. Hiroaki ◽

T. Nishimatu ◽

T. Eiji

Keyword(s):

Near Infrared ◽

Spectral Imaging ◽

Infrared Spectral ◽

Lettuce Growth

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Detonation discrimination techniques using a near-infrared focal plane array camera

10.1117/12.543082 ◽

2004 ◽

Cited By ~ 1

Author(s):

Anthony N. Dills ◽

Glen P. Perram ◽

Steven C. Gustafson

Keyword(s):

Focal Plane ◽

Near Infrared ◽

Focal Plane Array ◽

Infrared Focal Plane Array ◽

Array Camera

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Terahertz Synthetic Aperture Imaging with a Light Field Imaging System

Electronics ◽

10.3390/electronics9050830 ◽

2020 ◽

Vol 9 (5) ◽

pp. 830

Author(s):

Nanfang Lyu ◽

Jian Zuo ◽

Yuanmeng Zhao ◽

Cunlin Zhang

Keyword(s):

Focal Plane ◽

Light Field ◽

Imaging System ◽

Focal Plane Array ◽

Terahertz Imaging ◽

Image Distortion ◽

Resolving Power ◽

Synthetic Aperture ◽

Array Detectors ◽

Field Imaging

In terahertz imaging systems based on Gaussian beam active illumination and focal plane array detectors, severe image distortion has been observed, which significantly reduces the resolving power of the imaging system. To solve this problem, a novel computational method, Light Field Imaging (LFI), has been introduced for terahertz imaging. A conventional transmission-type terahertz imaging system based on a gas-pumped terahertz source and terahertz Focal Plane Array Detectors (FPA) arrays is established to analyze the problem of image distortion. An experimental virtual camera array terahertz LFI system is also established. With the acquisition and reconstruction of synthetic aperture terahertz light fields, the improvement on resolving power and SNR performance have been validated.

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