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Products
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web page has a complete listing of high performance
gratings we make along links to graphs of S & P diffraction efficiencies, dispersion, Bragg
Angle sensitivity, and PDL where applicable
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HSI
is normally represented as a image cube consisting
of millions of elements; the spatial data is in the
XY plane and the spectral data is in the Z-axis.
An HSI first maps an image strip onto an X-Y row of
pixels in a CCD camera. Each pixel in this row
is simultaneously spread into a Z column of spectral
data and then the frame is read. Next, the HSI
scans to the next XY strip. This is repeated
until a 2-dimensional spatial image is built up.
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Description
HyperSpectral Imaging (HSI) is also known as imaging spectroscopy*.
It is a passive, electro-optical, remote sensing technology
that reveals hidden image information by collecting and examining
spectral data. Typically this data is in the visible
and near-IR with the UV rarely being used. Most natural
and man-made materials contain characteristic or diagnostic
absorption/reflectance features. Much of the useful
data is not discernible to the human eye.
Defense
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Camouflaged
and Stealth Target Detection (e.g. tanks in
jungles, submarines underwater, mines)
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Target
Ranging
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Agriculture
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Mineral
Identification
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Terrain/Geophysical
Exploration
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Food
Inspection/Crop Monitoring
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Medical
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Burn
Assessment
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Cancer
Cell Detection
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Drug
Screening/Testing
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Many defense airborne and spaceborne reconnaissance
systems already have shifted from single sensor systems
to those using high spatial resolution. More
medical and agriculture applications are developing.
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Volume Phase Holographic Gratings provide
high dispersions with very high efficiencies in both polarizations
over very wide bandwidths. This is important because
the number of photons may be limited and their polarizations
are random. All gratings are made in hardened, baked,
and environmentally stable dichromated gelatin (DCG).
The gratings are sealed with glass on both sides resulting
in a rugged, scratch resistant, easily handled product.
They may be cleaned with soap and water.
*Terminology
Electro-Optic Sensors (field tested <1970): one wavelength
band
Multispectral Imaging (field tested ~1989): 10 wavelength
bands, each 100 nm wide
Hyperspectral Imaging (field tested ~1994): 100 wavelength
bands, each 10 nm wide
Ultraspectral Imaging (field tested soon?): 1000 wavelength
bands, each 1 nm wide
In-Line Spectrometer Design Diagram
We provide a high level of customer service.
Additionally, we offer consulting, design, prototype, product
integration, and quantity production at competitive prices.
For sales info contact 435-752-4301, email
us, or send us a completed Customer
Grating Worksheet.
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