A quick recap on transfer functions before we get going might be beneficial. A control system is used to define electromechanical behavior.

Measuring the transfer function entails the use of a large measuring system and a massive amount of work to obtain data from all directions.

Looking at compensator design in LTspice. Transfer functions are used in the design of electronic systems such as filters, power supplies, and other control systems.

Technical Terms Modulation Transfer Function (MTF): A quantitative measure of an optical system's capacity to transfer contrast at varying spatial frequencies from the object to the image.