Contact sensing probe for a measuring apparatus

Details Contact sensing probe for a measuring apparatus Contact sensing probe for a measuring apparatus

1983-09-02

1985-04-30

Little, Willis

Geometrical instruments

Area integrators

Electrical

33172E, 33174L, G01B 1124

Patent

active

045135070

ABSTRACT:
A coordinate measuring machine probe of the type including an arrangement for detecting contact with a surface, in which a light source and a plurality of photocells are arranged to generate an electrical signal upon probe pivoting motion by detection changes in light intensity sensed by the photodetectors. A summing circuit measures the total incident illumination of the photocells and controls the light source to maintain the total illumination of the photocells to be constant.

REFERENCES:
patent: 3512852 (1970-05-01), North
patent: 3520063 (1970-07-01), Rethwishi et al.
patent: 4078314 (1978-03-01), McMurtry
patent: 4158768 (1979-06-01), Lavelli
patent: 4334362 (1982-06-01), Germano et al.
patent: 4338722 (1982-07-01), Delmas

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