Blackening sensor

Details Blackening sensor Blackening sensor

1979-08-09

1981-02-24

Rosenberger, R.A.

Optics: measuring and testing

By monitoring of webs or thread

For flaws or imperfections

250562, 356446, G01N 2147

Patent

active

042524431

ABSTRACT:
A blackening sensor analyses a signal generated by the detection of scattered light reflected from a succession of small illuminated areas on the surface of a web to determine the degree of skewness of the amplitude distribution of the generated signal from a normal distribution, thereby to provide an indication of the degree of blackening.

REFERENCES:
patent: 3345908 (1967-10-01), Jensen
patent: 4019066 (1977-04-01), Lucas et al.
patent: 4092068 (1978-05-01), Lucas et al.

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