Apparatus for measuring surface reflectance characteristics

Details Apparatus for measuring surface reflectance characteristics Apparatus for measuring surface reflectance characteristics

1980-07-17

1984-06-19

Arnold, Bruce Y.

Optics: measuring and testing

Of light reflection

By comparison

G01N 2101

Patent

active

044550901

ABSTRACT:
An instrument for measuring surface characteristics based on the opacity of a material has an optical projection system for illuminating a sample and photocell arrangement for measuring light reflected from the sample. The instrument contains standard black and white surfaces with reference to which the sample opacity is measured. The photocell signal is digitized and the results processed and calculations made by a microprocessor system enabling sets of results to be stored and mean and standard deviations to be calculated. The instrument is particularly intended for testing paper and, in connection with carbonless copy paper, enables a measure to be made of the density of an imprint relative to the background that is called calender intensity.

REFERENCES:
patent: 4373818 (1983-02-01), Yamamoto et al.

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