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FAQs - Frequently Asked Questions

What about the temperature stability of the wlm?

Before measuring the wavelength meter needs to be in thermal equillibrium with its environment. Usually it's enough when it's kept in the lab for 1-2 hours before the measurement. As the temperature of the interferometer is measured and considered in the calculation, slow temperature changes doesn't influence the accuracy. But what does "slow" mean?

In the diagrams above you can see the temperature stability of our wlms. The wlm was kept in a climate chamber for several hours while changing the temperature drastically. As long as the change is below approx. 2°C/h, the temperature drift is compensated quite well.