Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrophotometer
Patent
1988-09-06
1990-05-01
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrophotometer
250228, 356236, 356448, G01J 342, G01N 2155
Patent
active
049213512
ABSTRACT:
The present invention is drawn to a spectrophotometer using a pulsed xenon flashtube as a light source. The energy to be applied to the light source of the spectrophotometer is set within a range of 0.03 joules to 1.0 joule. Therefore, the intensity of light emitted from the light source is not too great, which allows the spectrophotometer to measure a spectral reflectance under the presence of natural light or equivalents thereof. Further, the charging period of time required for the spectrophotometer to provide a desired light emission intensity is short, so that the light source is capable of emitting many flashes of light per second, wherein the amount of data produced within a predetermined measuring period is increased. Thus, accurate data can be generated.
REFERENCES:
patent: 3458261 (1969-07-01), Bentley et al.
patent: 4687329 (1987-08-01), Schultz
patent: 4753530 (1988-06-01), Knight et al.
Kishner, "A Pulsed-Xenon Spectrophotometer with Parallel Wavelength Sensing", Proceedings of the Third Congress of the International Color Association, Troy, N.Y., USA, 10-15 Jul. 1977, pp. 305-308.
Kohigashi Taiji
Koyama Miki
Kurashiki Boseki Kabushiki Kaisha
McGraw Vincent P.
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