Television – Special applications – With endoscope
Patent
1995-01-10
1997-05-27
Au, Amelia
Television
Special applications
With endoscope
348 68, 348 85, 600109, 600129, H04N 718, A62B 104
Patent
active
056336756
ABSTRACT:
A device for measuring the size of targets viewed with a borescope having a housing with a longitudinal axis and a distal viewing end with an optically transparent window set therein, a source of target illumination which projects a cone of illumination so that the axis of the cone of illumination is at an angle of less than 90.degree. with the housing axis, a contrasting shadow generated in association with the illumination source so as to project the contrasting shadow on the target, an image detector disposed adjacent to the source of illumination, directed so as to detect the image of the target and the contrasting shadow, a display for viewing the target and shadow as detected by the image detector, and a measuring device for measuring the parameters of the contrasting images on the display so that the actual size of the target can be determined.
REFERENCES:
patent: 2932294 (1960-04-01), Fourestier
patent: 4281931 (1981-08-01), Chikama
patent: 4576147 (1986-03-01), Hashiguchi
patent: 4588294 (1986-05-01), Siegmund
patent: 4732474 (1988-03-01), Chikama
patent: 4867138 (1989-09-01), Kubota et al.
patent: 4980763 (1990-12-01), Lia
patent: 4995396 (1991-02-01), Inaba et al.
patent: 5051824 (1991-09-01), Nishigaki
Patent Abstracts of Japan, vol. 16, No. 85 (P-1319), 28 Feb. 1992 & JP-A-03 269407 (Olympus Optical Co. Ltd.), 2 Dec. 1981.
Danna Dominick
Lia Raymond A.
Au Amelia
Welch Allyn, Inc
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