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 first edition of The Dissector was mailed, free of charge, to all those who had attended the 1973 seminar.
The VH Dissector will help address the need to train more medical and healthcare providers throughout Mexico and Latin America by providing real experience in human anatomy in a virtual environment," said Touch of Life Technologies CEO Vic Spitzer, Ph.
The longer PTFE dissector rod requires the use of less force and has reduced resistance during dissection.
NZNO's Perioperative Nurses College journal The Dissector is now available electronically via the Gale Academic OneFile database.
Kathryn Fraser, RN, MN, is the editor of The Dissector, the journal of the Perioperative Nurses College of NZNO.
The versatility of the instrument line enables surgeons to select handles and shafts and choose from more than 55 grasper, dissector and clamp inserts to create a customized configuration that meets the specific needs of the procedure and the surgeon.
The student learns and practices proper placement of the camera port, dissector port, and stapler port.
Its contents will soon be available online through the Gale Cengage learning academic databases, thus giving The Dissector international access and readership.
The Lap Grasper, Maryland Dissector and Endo Scissors, available in both free and ratchet handle configurations are simplistic in use versus competitive devices.
Coming to market soon, these instruments comprise the SILS[TM] Clinch, SILS[TM] Hook, SILS[TM] Shears and SILS[TM] Dissector.