The temperature stabilization and temperature measurement of a Kosters interferometer

In this work, the mechanical design, optical setup and temperature measurement system of a Kosters interferometer are described for the length measurements of long gauge blocks. The temperature variation of 9 mK at 15 degrees C and 2 mK at 20 degrees C was measured inside the interferometric chamber using the six air and four surface thermistors. The temperature stability is analysed by using standard deviation and Allan variance statistics.