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

Transfer functions analyze how system output changes depending on the input. This article details how to implement a transfer function in LTspice, comparing ideal vs. modeled ...

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.