Optics: measuring and testing – By shade or color – With color transmitting filter
Patent
1999-05-27
2000-05-09
Evans, F. L.
Optics: measuring and testing
By shade or color
With color transmitting filter
356236, 250226, 250228, G01J 351, G01N 2127
Patent
active
060611405
ABSTRACT:
A spectrophotometer providing a sample measurement area of selectable size. The spectrophotometer includes a sphere defining a sample station, a lamp to illuminate the interior of the sphere and therefore the sample station, a color measurement engine including an aperture directed toward the sample station, and a measurement area size selector. The size selector includes a movable plate defining two or more holes of different sizes. The plate can be moved so that only one of the holes is aligned with the aperture to control the size of the measurement area sampled by the color measurement engine.
REFERENCES:
patent: 5369481 (1994-11-01), Berg et al.
U.S. Pat. application No. 08/305,870, filed Sep. 14, 1994, by Bernard J. Berg et al and Entitled "Compact Spectrophotometer".
U.S. Pat. application No. 08/368,208, filed Dec. 30, 1994, by Bernard J. Berg et al and Entitled "Compact Spectrophotometer".
U.S. Pat. application No. 08/714,969, filed Sep. 17, 1996, by Bernard J. Berg et al and Entitled "Compact Spectrophotometer".
P.A. Palumbo et al, Novel spectrophotometer for the measurement of color and appearance, 380 Analytica Chimica Acta pp. 243-261 (1999).
Berg Bernard J.
Boes Thomas J.
Zuiderveen Marc D.
Evans F. L.
X-Rite Incorporated
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