By Austin Richards
Austin Richards takes readers on a visible journey of the electromagnetic spectrum past the diversity of human sight, utilizing imaging know-how because the ability to "see" invisible gentle. Dozens of colourful photographs and transparent, concise descriptions make this an fascinating, available technical booklet. Richards explains the sunshine spectrum, together with seen gentle, and describes the complex imaging applied sciences that allow people to synthesize our personal model of "alien" imaginative and prescient at assorted wavelengths, with purposes starting from fireplace struggling with and legislations enforcement to botany and drugs.
the second one version expands latest content material, explores contemporary components of study, and offers new illustrations that show the variety of imaginative and prescient in the course of the spectrum
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Additional info for Alien Vision: Exploring the Electromagnetic Spectrum with Imaging Technology
They are therefore more likely to be absorbed by many materials, as the higher photon energies stimulate quantumstate transitions in both atoms and molecules that result in the UV photons being absorbed. Shortwave infrared light does not have the right photon energies to be absorbed in the same way—it takes more material to absorb it. Many materials composed of organic molecules are prone to absorb UV and transmit near-IR. Some inorganic materials like window glass will absorb UV and transmit VIS and near-IR.
These filters protect the lens surface and also reduce UV haze that is especially apparent in landscape photography. 41 shows four images of the moon and the landscape around Nellis Air Force Base in Las Vegas. The UV image is highly affected by haze in the air that makes the mountains less distinct and by Rayleigh scattering of UV light by the atmosphere that completely obscures the moon. The visible image of the moon is hard to see against the bright blue sky. In the near-IR band, the moon is much more distinct, as the sky brightness diminishes and the effects of haze in the air become less substantial.
We can visualize the infrared absorption of water with SWIR imaging technology. 12 show a glass of water viewed in both visible light and SWIR light in the 900–1680-nm waveband. 12 FLIR) Visible (left) and SWIR (right) images of water in a plastic cup. (Courtesy of The water looks like strong coffee because near-IR and SWIR light is strongly absorbed by liquid water, owing to the presence of molecular absorption bands in water at various wavelengths, including 760, 970, 1190, and 1450 nm. The infrared image of the glass of water shows that the light within the camera’s spectral sensitivity (900–1680 nm) is highly absorbed and thus would not be useful for imaging underwater.