Bell and Howell, Mitcheldean.
Robin Phelps wrote: "... Janet Thomas working at Bell and Howell (forerunner of 'Ranks', as you know) in 1960. She said that she is assembling 'Magic eyes' for Bell and Howell photographic equipment. I'm not sure what a 'Magic eye' was or did. Perhaps someone knows. In any case, an interesting pair of images that illustrate that there was once major manufacturing in the Forest".
Jeff Jones added: "... I'm no B.&H. expert but a magic eye was the nickname for the early electronic optical sensors more correctly called photocells. They are basically light-sensitive switches, presumably used to help control/regulate the ambient light exposure of the B.&H. cameras . Modern cameras are full of such automatic devices".
Terry Morton added: "... The magic eye that I know of was used in radios too, - we had one. It was a valve that had a glass top about an inch wide very much like an eye. Laid horizontally it looked like an eye and when you tuned a radio signal the green light that encircled the pupil got closer together at the bottom. The aim was to get the edges as close as possible. That indicated the strongest signal".
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