In Maximilian Hoffmann's TM2 project, a patent application with the number 10 2022 112 470 was successfully filed. Specifically, a method for stabilizing the air refractive index or gas density in a precision measuring chamber was developed. This is achieved by continuously determining the environmental parameters in the chamber. Any deviations are compensated for by actively correcting the chamber pressure. This allows sensitive measurement setups (optics, weighing technology) to be operated under highly stable ambient conditions. This makes it possible to decouple the air refractive index/air density from all relevant environmental influences (air pressure, air temperature, air humidity, CO2 content) and avoids the need for mathematical correction of complex optical systems, for example. Furthermore, a stabilization of the imaging parameters of optical systems and an operation close to normal conditions can be achieved without complex vacuum technology. The disclosure document can be found here.