Apparatus for determining microhardness

Details Apparatus for determining microhardness Apparatus for determining microhardness

1986-08-21

1989-04-11

Mis, David

Optics: measuring and testing

By polarized light examination

With light attenuation

73 81, 73 85, G01B 1122, G01N 300, G01N 348

Patent

active

048200514

ABSTRACT:
The microhardness of a specimen is determined by measuring (1) the penetration depth of an indenter which is forced into the specimen, and (2) the load applied to the indenter. The load which is applied to the indenter is preferably measured by an electrobalance. In order to detect the penetration depth of the indenter into the specimen, an optical detector is integrally connected to cooperate with the indenter. A light beam is directed toward a predetermined position where a mirror reflects the light beam in a manner which varies in response to the penetration depth of the indenter.

REFERENCES:
patent: 4147052 (1979-04-01), Tsujiuchi et al.
patent: 4275966 (1981-06-01), Kleesattel
patent: 4277174 (1981-07-01), Kleesattel
patent: 4691559 (1987-09-01), Fischer
patent: 4699000 (1987-10-01), Lashmore et al.

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