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1 scan head
"An optical device found in scanners and fax machines that moves across the subject being scanned, converts light and dark areas to electrical signals, and sends those signals to the scanning system for processing."
См. также в других словарях:
Optical fiber — A bundle of optical fibers A TOSLINK fiber optic audio c … Wikipedia
Optical hybrid — A 90° optical hybrid is a six port device that is used for coherent signal demodulation for either homodyne or heterodyne detection. It would mix the incoming signal with the four quadratural states associated with the reference signal in the… … Wikipedia
Electrical telegraph — A printing electrical telegraph receiver, and a transmitter key at bottom right An electrical telegraph is a telegraph that uses electrical signals, usually conveyed via telecommunication lines or radio. The electromagnetic telegraph is a device… … Wikipedia
Optical mesh network — Transport network based on SONET/SDH ring architecture Optical mesh networks are a type of telecommunications network. Transport networks, the underlying optical fiber based layer of telecommunications networks, have evolved from DCS (Digital… … Wikipedia
Optical computing — Today s computers use the movement of electrons in and out of transistors to do logic. Optical or Photonic computing is intended to use photons or light particles, produced by lasers or diodes, in place of electrons. Compared to electrons,… … Wikipedia
Optical communications repeater — An optical communications repeater is used in a fiber optic communications system to regenerate an optical signal by converting it to an electrical signal, processing that electrical signal and then retransmitting an optical signal. Such… … Wikipedia
Optical resolution — This article is about optical resolution in optics. For the method of separating enantiomers in chemistry, see Chiral resolution. Optical resolution describes the ability of an imaging system to resolve detail in the object that is being imaged.… … Wikipedia
Optical cross-connect — An optical cross connect (OXC) is a device used by telecommunications carriers to switch high speed optical signals in a fiber optic network, such as an optical mesh network. There are several ways to realize an OXC: Opaque OXCs (electronic… … Wikipedia
Optical tweezers — (originally called single beam gradient force trap ) are scientific instruments that use a highly focused laser beam to provide an attractive or repulsive force (typically on the order of piconewtons), depending on the refractive index mismatch… … Wikipedia
Electrical engineering — Electrical engineering, sometimes referred to as electrical and electronic engineering, is a field of engineering that deals with the study and application of electricity, electronics and electromagnetism. The field first became an identifiable… … Wikipedia
Optical heterodyne detection — is an important special case of heterodyne detection. In heterodyne detection, a signal of interest at some frequency is non linearly mixed with a reference local oscillator (LO) that is set at a close by frequency. The desired outcome is the… … Wikipedia