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 ability to 'see' invisible gentle. Dozens of colourful photos and transparent, concise descriptions make this an fascinating, obtainable technical ebook. Richards explains the sunshine spectrum, together with seen mild, and describes the complex imaging applied sciences that permit people to synthesize our personal model of 'alien' imaginative and prescient at diverse wavelengths, with functions starting from hearth battling and legislation enforcement to botany and medicine.


- checklist of Figures

- Preface

- creation

- Infrared and Ultraviolet: the sides of the Rainbow

- Thermal Imaging: all of us Glow at midnight

- Microwave and Millimeter-Wave Imaging: Piercing the Veil

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

- Acoustic Imaging: Seeing with Sound

- Sweeping throughout the Spectrum: Comparative Imagery

- Epilogue

- thesaurus

- Bibliography and net assets

- Index

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Sample text

The pseudocolor bar on the right indicates the temperature from hottest (white) to coldest (black). These data can be used to characterize defroster performance. Thermal imaging is applied to a multitude of automotive systems evaluations, since many parts of an automobile operate at temperatures above or below the ambient temperature. The left image in Fig. 16 is a visible-light image of a transformer bank near sunset. There is no visible indication that the transformers are energized, since they only heat up 10–15°C in operation, which is not nearly hot enough to make them glow with visible light.

It is then indistinguishable from the other burner if imaged in the SWIR waveband. Before the burner achieves thermal equilibrium with its surroundings, it will only be a few degrees hotter than the one that was never heated. It will not feel hotter than the other burner to the finger, and yet the temperature difference will be easy to see with a thermal imaging camera. 01°C or smaller. This is possible because the intensities of the MWIR and LWIR light emitted by “room temperature” objects vary sharply with their temperature.

The alien creature in Predator hunts a band of mercenaries led by Arnold Schwarzenegger through the jungles of Central America. The alien uses thermal imaging technology to see people and animals in the dense undergrowth. The protagonist in Hollow Man is a person made invisible through a military experiment; he can only be seen with a thermal imaging camera. The thermal infrared world looks different in bright sunlight too. Conventional photographs taken in bright sunlight tend to be washed out by scattered visible light, which can reduce the sharpness of shadows.

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Alien vision : exploring the electromagnetic spectrum with imaging technology by Austin Richards

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