That's not it. "Phase information" charactises "coherence", as a laser, for example, is a coherent beam of light. This is what allows it to produce interference patterns.
You can shine a laser through a lens, and bounce it off mirrors, and this coherence will be preserved, but CCD's require absorption of photons, and so the information thus recorded is reduced to INTENSITY, as opposed to AMPLITUDE, which preserves or carries "phase information". So a surface of CCDs can never duplicate an optical mirror surface.
This is according to my own understanding, and I stand ready to be corrected, ( but it would take some doing! )
An earlier Comment said that a CCD was like the raw film in a camera - it just “counts” the photons.
It requires a lens to create a photograph.
So, tomorrow, I will be at You Tube watching educational videos about phase information, interference patterns, and amplitude.