Dissector


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Dissector

 

a television camera tube that does not store electrical charge. Dissectors are chiefly used in auxiliary automatic television systems (for example, to find the position of a light source). Upon illumination, the photocathode of a dissector emits electrons from its surface with a flow density corresponding to the distribution of the illumination on the surface. The electron image thus created on the photo-cathode is transferred by an electrical field in a uniform magnetic field that focuses the image on an electron multiplier tube. The electron image is broken down into discrete electrical signals by the magnetic field of deflection coils, which varies in two perpendicular directions with respect to the input aperture of the electron multiplier tube. These signals are then passed from the collector of the electron multiplier tube to an amplifier in the automatic system. The sensitivity of a dissector is low.

V. I. BARANOV

References in periodicals archive ?
The latest circulation data for The Dissector includes 687 members (including 32 life members).
The Dissector is now included in three online, international databases: CINAHL, Academic OneFile and the British Nursing Index (BNI), with full text database from March 2013 onwards.
The commercial release of the Navigator Tissue Dissector complements Medtronic's Cardioblate family of bipolar solutions with technology for this stand-alone, surgical ablation procedure.
The Dissector has adopted the American Psychological Association (APA reference) system (2010).
two dedicated medical imaging pages wile be allocated in The Dissector, containing information of interest to MINs and updates of news from the regions.
The Dissector is your journal and we are dependent on receiving a steady stream of material from across the perioperative continuum.
In addition to the readership of 'hard' copies, The Dissector is now accessed by thousands of nurses globally through its inclusion in several major website based international nursing databases.
An ON-DEMAND ratchet dial lets the surgeon decide when to lock or unlock, whether using a scissor, grasper or dissector.
Thirty years of publication of The Dissector, the quarterly journal of the Perioperative Nurses' College of NZNO, have now been bound and indexed, and will be available to members as a reference resource from NZNO's library at national office in Wellington.
In 1970, Scan-Optics was the first manufacturer to make scanning by image dissector tube (IDT) commercially available.
25 covers the publication and delivery of The Dissector.
Tenders are invited for GrodMT 031 / PEA-17, Lot 5 Cutting loops to endoscopic complex manufactured by MGB (Germany) for the operating unit ultrasonic Cancer "GOKB"; Lot 6 retrofitting existing facility in the water jet dissector ERBEJET-2 (Germany) kartri