Pyrometer:  Power Lasers, Metall- and Steel-Processing


Pyrometers for metal processing beyond 750 °C,  e.g. laser treatment . The optic can be adapted to all common laser sources (Nd:YAG, Diode or CO2).

Armed with certain filter functions these pyrometers can be offered with a strongly enhanced response to hot spots in the target area. Cause in many processes local hot spots within the target area have a much higher meaning than the average temperature of the area. The increased sensitivity to hot spots is so distinct, that even much more expensive and delicate quotient pyrometers cannot offer such signal dynamic.

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Pyrometer for Integration in Laser Heads
pzro
Pyrometer unit with thread adapter
 Pyrometer im Härteprozess
Pyrometer Mounted to the Beam Divider of a Industrial Laser Head

Fiberoptical Pyrometers

faserpyro

faserpyr

diodenlaser
 Fiberoptic pyrometers have advantages in certain applications. Typical criteria are:
  • Non-sensitive to EMI wasted environmet
  • Wide range of operation temperature, no electronic parts in the pyro head
  • Smaller size of pyro head

Example: Enhanced hot spot dynamic in diode laser annealing

blechgluehen

A power diode laser scribed a temper trace from left to right over the 3 steelplates. The laser power was kept constant. At the outcome edges on the right of the plates small overheating spots occured, the steel locally liqiufied here.
 gluehsignal

The corresponding signal of a hot spot pyrometer: The overheated  spots at the outcome edges were noticed with a very strong amplitude. The remarkable signal  dynamic is advantegeous for registration and regulation of smallest hot spot events.