Boots – shoes – and leggings
Patent
1977-01-26
1978-06-06
Wise, Edward J.
Boots, shoes, and leggings
364498, 356 96, G01N 2122, G01J 302, G06F 1520
Patent
active
040939910
ABSTRACT:
A combined scanning spectrophotometer-digital data processing system including a microcomputer is described for making appearance measurements. The instrument is comprised by an optical sensing unit and a signal processing unit. The optical sensing unit utilizes a simulated D65 light source lamp together with an 8 inch diameter integrating light sphere for use primarily in the diffuse polychromatic illumination of reflectance test specimens but which also is used with transmittance test specimens. Light leaves the sphere through a transmittance port in which a transmittance test specimen may be disposed in the case of transmittance measurements. The light sphere further includes a reflectance port for making reflectance measurement of a test specimen placed at the reflectance port. Light from the reflectance test specimen leaves the sphere through the transmittance port along a single light beam path which is directed onto a rotating variable interference filter wedge for isolating the individual wave lengths over the visible spectrum. Light level at each wave length is sensed by a silicon diode electro-optic detector whose output is converted to digital signal form and together with a wave length identification signal supplied from a shaft encoder rotated synchronously with the rotating variable interference filter wedge monochromator, is supplied from the optical sensor unit to the signal processing unit. The signal processing unit utilizes a preprogrammed microcomputer and an operator controlled keyboard to quickly and easily perform zero adjust and standardization corrections together with other second order effect corrections and derives output measures of true reflectance, true transmittance, tristimulus color values, color scale values and color difference values. A printer or other display device is connected to the microcomputer to print out or display the spectrophotometric data or other tristimulus or color scale values representative of the appearance characterstics of either a transmittance or reflectance test specimen.
REFERENCES:
patent: 3695764 (1972-10-01), Delmas, et al.
patent: 3701601 (1972-10-01), Plumpe, Jr., et al.
patent: 3878378 (1975-04-01), Johnseo, et al.
patent: 3935436 (1976-01-01), Holschlag
patent: 3986776 (1976-10-01), George
Christie, Jr. John S.
Jenkins S. Upton
McConnell George B.
Helzer Charles W.
Hunter Associates Laboratory Inc.
Wise Edward J.
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