Patent ID: 11904426
Assignee: RENISHAW PLC
Field: Measurement (Instruments)
Classification: CPC B  G | IPC B  G

Claim 11:
12. A non-contact tool measurement apparatus for a machine tool, comprising;
a transmitter comprising a first aperture and a laser for generating light, the light generated by the laser being emitted from the transmitter through the first aperture towards a tool-sensing region,
a receiver comprising a second aperture and an optical detector for detecting received light, the receiver being arranged to receive light from the tool-sensing region, the received light passing to the optical detector through the second aperture, and
the transmitter and receiver being arranged such that the light emitted by the transmitter passes to the receiver via the tool-sensing region, a tool located in the tool-sensing region thereby occluding the emitted light and light passing from the transmitter to the receiver when no tool is present in the tool sensing region,
wherein the laser comprises a wavelength-tunable laser.