Combined distinctness of image and gloss meter

Details Combined distinctness of image and gloss meter Combined distinctness of image and gloss meter

1986-11-18

1988-05-24

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356446, 356447, 350275, G01N 2155

Patent

active

047468050

ABSTRACT:
A single meter measures the gloss and the distinctness of image (DOI) of a painted surface for quality evaluation of the finish. A DOI signal is obtained by a prior method of focusing the reflected image of a moving shutter onto a slit and measuring the light passing through the slit. The rate of increase of the resulting signal is used as a measure of DOI. The same signal is integrated over a preset time period covering the upper part of the signal rise to yield a value proportional to gloss.

REFERENCES:
patent: 2315282 (1943-03-01), Snow
patent: 2720812 (1955-10-01), Middleton
patent: 3549264 (1970-12-01), Christie
patent: 3850526 (1974-11-01), Corey, III
patent: 3922093 (1975-11-01), Dandliker et al.
patent: 4285597 (1981-08-01), Lamprecht et al.
patent: 4527898 (1985-07-01), Stapleton
patent: 4613235 (1986-09-01), Suga
Matsuta et al., "Development of Gloss Tester for Paint Coatings", Japanese Journal of Applied Physics, vol. 21, No. 1, Jan., 1982 pp. 133-136.

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