Touch probe including a waveguide

Details Touch probe including a waveguide Touch probe including a waveguide

1990-08-21

1992-06-02

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25022719, 25022721, G01N 2186, G01V 904, H01J 516

Patent

active

051189569

ABSTRACT:
A touch-trigger probe is provided with a sensor (which may be a mirror (106), an optical fibre (206), or a bi-refringent element (307)) which changes state by vibrating or undergoing strain when a stylus connected to the probe contacts a workpiece. The sensor is typically provided on (in the case of the mirror (106)), or in (in the case of the optical fibre (206)) the stylus. The change of state of the sensor causes a change in the path length, polarization state, or intensity of light waves conveyed by the sensor. An interferometer may be provided to detect such changes. Other forms of electromagnetic waves may be used to the same effect.

REFERENCES:
patent: 4177568 (1979-12-01), Werner et al.
patent: 4222669 (1980-09-01), Frosch et al.
patent: 4246795 (1981-01-01), Sigg et al.
patent: 4294121 (1981-10-01), Inoue
patent: 4358960 (1982-11-01), Porter
patent: 4380394 (1983-04-01), Stowe
patent: 4509858 (1985-04-01), Smythe et al.
patent: 4561776 (1985-12-01), Pryor
patent: 4670989 (1987-06-01), Juengel
patent: 4694184 (1987-09-01), Pryor
patent: 4763421 (1988-08-01), Feichtinger
patent: 5018280 (1991-05-01), Enderle et al.

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