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Hyperspectral Camera
10/28/2020 2:26 PM
The ear has good frequency resolution but mediocre spatial resolution. The eye has good spatial resolution, but frequency (color) resolution consists of only four broad bands (red, green, and blue cones and night vision rods). A hyperspectral camera combines the best of both worlds.
Hyperspectral imaging entails capturing a 3-dimensional block of information (a hyperspectral datacube), two spatial dimensions of pixels, and a spectrum for each pixel. There are various methods of capturing hyperspectral images, but most are slow, complicated, and/or expensive.
Here is an idea that seems to show promise. We have all probably noticed the colors that plastic displays when viewed in polarized light. This method uses that phenomenon, the interference of ordinary and extraordinary rays in a dichroic material.
Fig. 1 Liquid crystal spectral encoder (a) is placed inside camera body, shown schematically in (b); corresponding photo of system (c)
Looks cool, but why such a short demo? I mean I've seen the security strip on a five dollar bill, surely there are other more interesting uses for this device.....
Hyperspectral Camera
Re: Hyperspectral Camera
