Download Alien vision : exploring the electromagnetic spectrum with by Austin Richards PDF

By Austin Richards

ISBN-10: 0819441422

ISBN-13: 9780819441423

Austin Richards takes readers on a visible travel of the electromagnetic spectrum past the variety of human sight, utilizing imaging know-how because the capability to 'see' invisible gentle. Dozens of colourful photographs and transparent, concise descriptions make this an interesting, available technical booklet. Richards explains the sunshine spectrum, together with seen mild, 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 hearth combating and legislations enforcement to botany and medicine.


- record of Figures

- Preface

- creation

- Infrared and Ultraviolet: the sides of the Rainbow

- Thermal Imaging: all of us Glow at nighttime

- Microwave and Millimeter-Wave Imaging: Piercing the Veil

- X Rays and Gamma Rays: Crookes Tubes and Nuclear mild

- Acoustic Imaging: Seeing with Sound

- Sweeping in the course of the Spectrum: Comparative Imagery

- Epilogue

- thesaurus

- Bibliography and web assets

- Index

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13 These receptors have peak sensitivity to light with a wavelength of 360 nm, which suggests that these fish perceive near-UV light as a distinct color, as butterflies and honeybees do. It is possible that near-ultraviolet vision may also help certain fish identify mates, in the same manner as butterflies, and this theory is supported by the presence of a variety of pigments in fish skin that have reflectance peaks in the near-ultraviolet waveband. 19 Visible (top) and near-UV (bottom) images of coral reefs and fish.

The mountains behind the transformers are warm, having been heated all day by the Sun (solar loading). 16 Visible (left) and MWIR (right) images of energized transformers. ) The transformers above are an example of a good application for thermal imaging for predictive maintenance, because, by design, they are hard to reach from the ground and are energized with high voltage on top, making noncontact temperature measurements from a distance safer and easier. If one of the transformers was malfunctioning, it would have a surface temperature that differed from the others in the bank.

7 The image in Fig. 21 shows a LWIR image of a ball of bees taken with an uncooled LWIR camera. Note the maximum temperature of the ball’s surface is about 43°C, according to the pseudocolor bar along the top of the image (white is equivalent to 48°C, pink is just a bit colder). The right image in Fig. 21 shows a dead hornet being dragged out of the hive by worker bees that have just killed it with a ball. 21 LWIR image of a bee ball (left) and visible image of dead hornet dragged by bees (right).

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