PICOSCALE Environmental Module

Refractive index compensation for measurements in air is easily achieved with the Environmental Module.

The Environmental Module (PS-EM) is an accessory product for the PICOSCALE. It monitors the environmental parameters such as temperature, relative humidity, and air pressure. With these data the PICOSCALE controller is able to correct the recorded displacement data for changes in the refractive index of air and thus virtual drifts of the target mirror.

Temperature Sensor
 
Accuracy 0.1 °C
Resolution 0.01 °C
Relative Humidity Sensor
 
Accuracy 1.8 % RH
Resolution 0.04 % RH
Pressure Sensor
 
Accuracy 1.5 mbar
Resolution 0.03 mbar
Overall
 
Δn/n 4 x 10-7

 

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