Photonics Online Resources
Quick Links to Photonics Online Resources:
From Photonics Spectra: Three-Time Winner of Folio: Magazine's
Editorial Excellence Award.
Worldwide Coverage of the Photonics Industry: Optics, Lasers, Fiber Optics,
Electro-Optics, Imaging, Bio-Technology and Optical Computing.
Photonics Spectra: News, Report
Online: Corporate Guide, Buyers' Guide
Dictionary: over 5800 technical terms, 230 illustrations, 1730 abbreviations,
descriptions and definitions.
main access page
Other Photonics Publications:
Biophotonics International | EuroPhotonics | Photonics Literature Showcase | Photonics Product Portfolio
| Photonics Postcards
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Photonics - The technology of generating and
harnessing light and other forms of radiant energy whose quantum unit is the photon. The
science includes light emission, transmission, deflection, amplification and detection by
optical components and instruments, lasers and other light sources, fiber optics,
electro-optical instrumentation, related hardware and electronics, and sophisticated
systems. The range of applications of photonics extends from energy generation to
detection to communications and information processing.
Optics - That branch of physical science concerned with vision and certain
phenomena of electromagnetic radiation in the wavelength range extending from the vacuum
ultraviolet at about 40 nm to the far-infrared at 1mm. Now being replaced by the more
inclusive term Photonics.
Optical Fiber - A thin filament of drawn or extruded glass or plastic having a
central core and a cladding of lower index material to promote internal reflection. It may
be used singly to transmit pulsed optical signals (communications fiber) or in bundles to
transmit light or ../ImagesNet.
Laser - An acronym of Light Amplification by Stimulated Emission of Radiation. A
laser is a cavity, with plane or spherical mirrors at the ends, that is filled with
lasable material. This is any material, crystal, glass, liquid, dye or gas, the atoms of
which are capable of being excited to a semistable state by light or an electric
discharge. The light emitted by an atom as it drops back to the ground state releases
other nearby, excited atoms, the light being thus continually increased in intensity as it
oscillates back and forth between the mirrors. If one mirror is made to transmit 1 or 2
percent of the light, a brilliant beam of highly monochromatic, coherent radiation is
emitted through the mirror. If plane mirrors are used, the beam is highly collimated. With
concave mirrors the beam appears to emerge from a point source near one end of the cavity.
Imaging - A reproduction of an object produced by light rays. An image-forming
optical system gathers a beam of light diverging from an object point and transforms it
into a beam that converges toward or diverges from another point, thus producing an image.
If the beam converges to a point, a real image is produced; if the beam diverges, a
virtual image is produced at its apparent source.