stigmator

stigmator

[stig′mäd·ər]
(electronics)
A device that corrects asymmetries in an electron lens by superposing on the field of the lens a second adjustable field.
References in periodicals archive ?
Performance has been enhanced through the addition of gamma correction circuitry and electronic stigmator control, RS-232 collision detection and projector programmability.
In response to customer needs in status display and control room installations, Electrohome developed the Marquee 8500 with standard features including contrast modulation and software-controlled electronic stigmators for improved center to edge resolution.