Optics: measuring and testing – Of light reflection – By comparison
Patent
1987-06-24
1989-05-16
Rosenberger, Richard A.
Optics: measuring and testing
Of light reflection
By comparison
356243, G01N 2155, G01J 118
Patent
active
048305049
ABSTRACT:
A device for determining gloss on a surface having a calibrating feature wherein a gloss calibration standard is provided by means of a built-in standardization surface. The standardization surface provides a reference to which the gloss of a sample surface is compared. The standardization surface is protected from dust build-up throughout the operation of the device.
REFERENCES:
patent: 2739246 (1956-03-01), Hunter
patent: 3591291 (1971-07-01), Greer et al.
patent: 3607623 (1971-09-01), Chappelle
patent: 3890049 (1975-06-01), Collins et al.
patent: 3960077 (1976-06-01), Aylett
patent: 4240691 (1980-12-01), Holmqvist et al.
Dahlquist John A.
Frohardt Allen
Howarth John J.
Measurex Corporation
Rosenberger Richard A.
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