The Idler (1993) — Infobox Magazine title = The Idler image caption = The Idler #36, the money issue editor = Tom Hodgkinson frequency = Bi Annual firstdate = 1993 category = Arts/Culture company = Idler country = flag|United Kingdom language = British English… … Wikipedia
Nonlinear optics — (NLO) is the branch of optics that describes the behaviour of light in nonlinear media, that is, media in which the dielectric polarization P responds nonlinearly to the electric field E of the light. This nonlinearity is typically only observed… … Wikipedia
Optical parametric amplifier — An optical parametric amplifier, abbreviated OPA, is a laser light source that emits light of variable wavelengths by an optical parametric amplification process. Contents 1 Optical parametric generation (OPG) 2 Optical parametric amplification… … Wikipedia
Phonograph — Turntable redirects here. For other uses, see Turntable (disambiguation). Edison cylinder phonograph ca. 1899 … Wikipedia
Optical parametric oscillator — Infrared optical parametric oscillator An optical parametric oscillator (OPO) is a parametric oscillator which oscillates at optical frequencies. It converts an input laser wave (called pump ) into two output waves of lower frequency (ωs,ωi) by… … Wikipedia
Quasi-phase-matching — is a technique in nonlinear optics which allows a positive net flow of energy from the pump frequency to the signal and idler frequencies by creating a periodic structure in the nonlinear medium. Momentum is conserved, as is necessary for phase… … Wikipedia
Rotary phase converter — DefinitionA rotary phase converter, abbreviated RPC, is a Rotary converter that produces Three phase electric power from Single phase electric power. This allows three phase loads to run using generator or utility supplied single phase electric… … Wikipedia
Delayed choice quantum eraser — Quantum mechanics Uncertainty principle … Wikipedia
LENCO Turntables — Lenco is now a Dutch brand of audio video equipment and part of the STL Group of brands. [cite web title = STL Group bv Homepage url = http://www.stl.nl accessdate = 2007 11 16 ] However, when audio hobbyists refer to Lenco turntables, they are… … Wikipedia
Refusal of work — is behavior which refuses to adapt to regular employment.[1] As actual behavior, with or without a political or philosophical program, it has been practiced by various subcultures and individuals. Radical political positions have openly advocated … Wikipedia
Parametric equalization — Parametric equalizer (or parametric EQ ) is an electronic multi band variable equalizer device used in sound recording and live sound reproduction with Public Address systems ( PA systems ). Parametric equalization devices allow audio engineers… … Wikipedia