Determining a refractive index for infrared wavelength ranges

A system comprising:

• a laser device to emit light;
• a measurement device to:
• determine a wavevector associated with the light entering a prism,
• determine an air gap between a bottom surface of the prism and a medium,
• determine an entrance angle of the light entering the prism,
• determine a reflection angle of reflection between interfaces associated with the prism,
• determine an interface angle between the prism and an interface;
• and
• a computing device to:
• determine a refractive index of the medium based on the wavevector, the air gap, the entrance angle, the reflection angle, and the interface angle.

A non-transitory computer-readable medium storing a set of instructions, the set of instructions comprising:

• one or more instructions that, when executed by one or more processors of a device, cause the device to:
• determine a wavevector associated with light entering a prism;
• determine an air gap between a bottom surface of the prism and a medium;
• determine an entrance angle of the light entering the prism;
• determine a reflection angle of reflection between interfaces associated with the prism;
• determine an interface angle between the prism and an interface;
• determine a refractive index of the medium based on the wavevector, the air gap, the entrance angle, the reflection angle, and the interface angle;
• and
• perform an action using the medium based on the refractive index of the medium.