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These googles shift or compress a section of the spectrum to allow human vision to see other parts of the spectrum. For example, double the frequency, or compress a wide bandwidth down into the narrow band of visible light.
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Baked, surely? - isn't this what Infra-Red night
vision goggles are? |
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They are a specific limited implementation of this general idea. |
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// isn't this what Infra-Red night vision goggles are? // |
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No, they're not. Not even a "limited implementation". |
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Typically, IR or image intensifier devices take a broad spectrum of photons and amplify them and convert them to a monochromatic image. There's no "colour". |
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There are telescope optics that can upshift the IR waveband to the optical one, producing "false colour" images, but there's no specific wearable device that does this. Yet. |
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They are under development, so that "Infra-Red Colours" can be seen - it would allow much more subtle discrimination, for example detecting camouflaged or otherwise concealed personnel and vehicles. However, they're certainly not WKTE. |
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[+] for a consumer-grade version. |
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Combined with headphones incorporating an audio downshifter, they could be used for watching bats. |
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No, the ones we're describing are fully active units. They have an IR-sensitive CCD which can detect multiple wavelengths, and do the false-colour interpretation electronically to a stereoscopic LCD display - like an Oculus, or Google Cardboard. No filters involved, other than the visible-blocking filter on the objective lenses. |
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