Word: lensed
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Dates: during 1950-1959
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The cause is a simple optical principle. The burning effect of the bomb's heat on exposed skin diminishes as the square of the distance (twice as far away, it is one-fourth as strong). But the eye is a lens that concentrates heat and light in a spot...
Cinemascope uses a distortion and rectification principle: a wide-angle distortion lens fitted to a regular 35-mm. movie camera produces distorted images on the film; a compensation lens, fitted on a " regular out the 35-mm. images movie on the projector, screen. "straightens" out the images on the screen...
...Speed Camera. University of California scientists described their new camera that needs less than a three-millionth of a second to click off a single picture. Unlike conventional motion-picture cameras with moving rolls of film the U.C. camera has two stationary strips of film and a bank of lenses. A thin mirror, spinning at 10,000 r.p.m., flashes the moving image from lens to lens down the film strips. As many as 100 snapshots can be taken in 1/120,000th of a second. Probable purpose of the superspeed camera: to photograph the luminous, super sonic shock wave from...
Conventional spectacles, Dr. Feinbloom explained, are simply magnifying glasses with lenses shaped like part of a sphere. No matter how much they magnify, they do not have enough "resolving power" to project a sharp image on the retina (the screen at the back of the eyeball) if the retina is damaged. Most partially sighted patients have retinas like a coarse-grained photographic plate: they can record a sharp image only if they are fitted with a lens of unusually high resolving power...
...student has three alternatives. If he brings his complaints to the Hygiene Building, he is steered toward a list of Boston optholmologists. These men have M.D. degrees, and may be of help of those with eye disease, but most students just need a power increase in their present lenses--so optholmologists are an expensive luxury. He might instead patronize the handful of opticians around the Square. Here, however, the student is helpless before the log-rolling collusion of examiner and lens grinder. This combination rarely fails to produce bills of less than twenty dollars...