I am trying to identify exactly where my film sheet should be positioned relative to the image formed on the ground glass. Further I would like to know the various effects of ground surface size/roughness and the effects of fresnel addition.

My understanding is that only one surface of the glass is ground. The actual ground surface forms an image by catching/“refracting” the rays passing through the glass. Am I correct in then assuming that this is the image forming plane that needs to be aligned with the film emulation?

Does anything change with a fresnel lens placed in front of the ground glass?

Which part of the film should the image plane be aligned to? The middle of the emulation layer? Does anyone have references on the various film layer thicknesses?

Is there a technical reference I can read more about the ground glass, image formation, fresnel effects and design, and film registration?