Download e-book for iPad: Alien Vision: Exploring the Electromagnetic Spectrum with by Austin Richards

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 expertise because the capability 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 let people to synthesize our personal model of 'alien' imaginative and prescient at assorted wavelengths, with functions starting from hearth battling and legislations enforcement to botany and medicine.

Contents

- record of Figures

- Preface

- creation

- Infrared and Ultraviolet: the perimeters of the Rainbow

- Thermal Imaging: all of us Glow at the hours of darkness

- Microwave and Millimeter-Wave Imaging: Piercing the Veil

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

- Acoustic Imaging: Seeing with Sound

- Sweeping during the Spectrum: Comparative Imagery

- Epilogue

- word list

- Bibliography and web assets

- Index

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Extra info for Alien Vision: Exploring the Electromagnetic Spectrum with Imaging Technology

Sample text

The antireflection coatings on quality lenses are optimized for visible light, and thus are not ideal for UV photography. 7. R. Williams, G. Williams, Jour. Biol. Phot. 61, 115–132 (1993). 8. T. , Science 166, 1172–1174 (1969). 9. G. , “Multi-Spectral Imaging of Dead Sea Scrolls and other Ancient Documents,” Biblical Archeologist (April 1995). 10. R. Barsley, M. West, and J. Fair, “Forensic Photography—Ultraviolet Imaging of Wounds on Skin,” The American Journal of Forensic Medicine and Pathology 11(4), 300–308 (1990).

18 shows a normal forearm imaged in the visible and MWIR bands. The surface of the skin is warmed up slightly by blood flow, and thus one can see the arteries and veins from their heat signature. If there were vascular damage to an area of the arm, then the skin there would appear colder than surrounding undamaged areas. Now consider a vascular abnormality that results in a thermal anomaly. 19 shows a MWIR image of a hand missing an index finger. The finger was lost in a shotgun accident, and as a result the stump is colder than the other digits as a result of vascular damage.

19 Visible (top) and near-UV (bottom) images of coral reefs and fish. (Courtesy of Prof. Thomas Cronin and the Journal of Fish Biology) Optical Properties of Materials in the Near-IR and Near-UV Why is it that materials like varnish and certain colors of oil paint are transparent to near-IR and SWIR light, but not to visible light? We have seen this phenomenon in the preceding examples of IR imaging, and it is worth exploring the science behind it. g. 14 These excitation modes manifest themselves as a strong response of the electrons in the material to light of a particular frequency (or equivalently, wavelength).

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Alien Vision: Exploring the Electromagnetic Spectrum with Imaging Technology by Austin Richards


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