Radiant energy – Invisible radiation responsive nonelectric signalling – Photographic type
Patent
1980-01-11
1983-09-13
Smith, Alfred E.
Radiant energy
Invisible radiation responsive nonelectric signalling
Photographic type
2504861, 378 41, 378149, G03B 1100, G03B 3500, G21K 102
Patent
active
044044712
ABSTRACT:
Lenticular x-ray film having a parallax grating mask near the lenticulations of the film and a high resolution intensifying screen near the emulsion side of the film. The film, the mask and the screen form a unit for placement in a cassette for use with an x-ray tomograph to produce x-ray photographs which can be viewed in three-dimension. The mask has a substrate transparent to x-rays and is provided with spaced recesses for receiving mercury, tungsten or other flowable material which is opaque to x-rays. The spaces between the recesses present gaps for the passage of x-ray beams and the gaps are shaped so that the spread of the x-ray beams striking the emulsion of the film is the same width as each lenticulation. Each groove has a certain height so that the material in the grooves is sufficiently opaque to the x-ray beams in the range of about 30 KVA to about 150 KVA. The intensifying screen is of a ceramic sheet material having an end face provided with a plurality of holes therein which are filled with a phosphor material. The phosphor material in the holes present flat end faces which are placed in abuttment with the emulsion of the film to present local point sources of visible light which are excited when x-rays, which pass through the film and the emulsion, strike the phosphor material. The lenticulations on the film permit the image on the emulsion to be viewed in three-dimension.
REFERENCES:
patent: 1447399 (1923-03-01), Pease
patent: 1447430 (1923-03-01), Richardson
patent: 2318983 (1943-05-01), Winnek
patent: 2512242 (1950-06-01), de Lassaus St. Genies
patent: 2936378 (1960-05-01), Jensen
patent: 3041228 (1962-06-01), MacLeod
patent: 3048698 (1962-08-01), Carlson
patent: 3783282 (1974-01-01), Hoppenstein
McKee William J.
Winnek Douglas F.
Fields Carolyn E.
McGannon John L.
Smith Alfred E.
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