Patent ID: 8701534

Claim:
A machine tool configured as a sawing machine, comprising: a work surface configured to support a workpiece to be machined; a tool-support unit for supporting a rotation of a tool about a first rotational axis and an arcing of the tool about a second rotational axis relative to the work surface; a recognition unit configured to detect, with the aid of spectral evaluation of radiation, the presence of a selected type of one of a material and a human tissue in a tool range as the tool is rotated about the first rotational axis and arced about the second rotational axis, wherein the recognition unit has a transmitter configured to transmit radiation having at least one radiation portion in the wavelength range which is at least partially in the infrared spectrum, wherein the transmitter unit is configured to transmit radiation in at least one additional wavelength range, and wherein the transmitter unit is configured to transmit radiation successively in a) the wavelength range which is at least partially in the infrared spectrum and (b) in the at least one additional wavelength range.