The answer to the equation above is called, "fusion technology."
Fusion technology combines the images produced by the NVGs and thermal optics, overlaying them to create a more detailed and comprehensive image. This can provide users with a better understanding of their surroundings and help them to identify objects or people that may be difficult to see with either technology alone.
For example - thermal imaging can be used to detect the heat signature of an object, while night vision can provide a clear visual image of the object. Combining these technologies can allow users to more accurately identify and track moving targets, and to differentiate between objects of varying temperatures in a nighttime environment. Some NVGs and thermal optics are designed with fusion capabilities built-in, while others can be paired with external devices or software to achieve fusion. The specific methods for combining the technologies can vary depending on the devices being used and the intended application.