Optimization of an optopneumatic interface

The optopneumatic interface consists of an optopneumatic detector (OPD) and four fluidic amplifiers connected in series. The optical signal is converted by photothermic effect into pneumatic signal in the OPD, connected with the control duct of the first fluidic amplifier. The OPD output pneumatic signal is amplified to obtain a signal whose amplitude is capable of controlling a common low/high pressure membrane valve.