Instrument for determining visual surface properties

Details Instrument for determining visual surface properties Instrument for determining visual surface properties

1992-11-24

1995-02-21

Rosenberger, Richard A.

Optics: measuring and testing

Of light reflection

356446, G01N 2155

Patent

active

053921259

ABSTRACT:
An instrument for determining visual surface properties includes a generally cylindrical housing 10 with an illumination unit 12 and a photo cell 22 disposed in its upper portion. The beam A emitted by the illumination unit 12 passes through an optical system 19 disposed in a lower portion of the housing 10 and is directed by a first prism 20 at a predetermined angle onto the surface 11 under examination. The beam A' reflected at a predetermined angle by the surface 11 is deflected by a second prism 20', passes the same optical system 19 a second time and is received by the photo cell 22. A plurality of pairs of prisms with different angles of incidence and reflection are arranged concentrically about the central axis N of the housing 10. An inexpensive instrument is thus achieved which is small in the direction parallel to the surface under examination.

REFERENCES:
patent: 3012465 (1961-12-01), Goldberg
patent: 3999864 (1976-12-01), Nutter
patent: 4285597 (1981-08-01), Lamprecht et al.
patent: 4988205 (1991-01-01), Snail
Bruecker, "Measuring The Specular Reflection on Surfaces", International Laboratories, pp. 28-32, (1990).

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