Inexpensive linear scanning of the Fabry-Perot interferometer

The solution presented here can be useful in optical measurements where scanning in the Fabry-Perot interferometer spectral range is needed. The key to the idea is the use of a pressure sensor equipped with stainless steel diaphragm giving voltage signal proportional to pressure in a chamber where the Fabry-Perot etalon is mounted. The method should find new fields of application, in a simple and cost effective way, in university laboratories as well as in other research institutions. The previous solution is updated here by introducing silicon membrane pressure sensor.