magic eye

magic eye

n (Electronics) a miniature cathode-ray tube in some radio receivers, on the screen of which a pattern is displayed in order to assist tuning

Tuning eye

A vacuum tube incorporating a cathode ray-incited fluorescent screen on the front of the tube. The tuning eye was used in the late 1930s and early 1940s to provide a visual indication of when a radio was optimally tuned. The tube was mounted in the radio in such a way that the image (a bright, varying width annular sector of the screen) on the tube could be watched while the tuning knob was turned.

Thesaurus

Noun

1.

magic eye - a transducer used to detect and measure light and other radiationselectric eye, photocell, photoconductive cell, photoelectric celldetector, sensing element, sensor - any device that receives a signal or stimulus (as heat or pressure or light or motion etc.) and responds to it in a distinctive mannerphotocathode - a cathode that emits electrons when illuminatedselenium cell - a photoelectric cell that uses a strip of seleniumtransducer - an electrical device that converts one form of energy into another