2D DIMENSIONAL IMAGING SPECTROMETERS from HEADWALL PHOTONICS

Also known as Hyperspectral Imaging, applications for 2 dimensional imaging spectroscopy are vast, ranging from identifying labelled cancer calls viewed through an endoscope, through identifying different plastics in a recycling centre and identifying forged banknotes, to locating drug fields.

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Using a CCD camera the system takes a picture of an object or a scene which can be viewed either as normal or in false colour to highlight certain features.  However in addition each pixel in the camera detector array and therefore the corresponding point on the image contains the complete reflectance spectrum of that point.  This is achieved by mounting between the lens and the detector array a special spectrometer to disperse the image into a spectrum.

How does it do this?

Although the final displayed image shows the complete scene, this is built up in a series of narrow slices taken as the camera moves over the object or the object is moved under a fixed camera.  Alternatively a scanning mirror allows both camera and object to be fixed.

Each slice of information is recorded using the full camera detector array but with the first column recording a narrow slice of the image and the rows recording the spectrum for each pixel in the column.

Starter kit

Standard System

Micro Sytems

Spectrographs