Canon Patent Application: DPAF improvements for Tilt-Shift AF lenses

[Canon Rumors Guy]

In this patent application (2024-043295), Canon is concerned about the AF performance of fast tilt-shift lenses. It seems that the incidence angle of light hitting the pixel will cause issues with AF performance around the periphery – especially when the plane of focus is tilted. In machine-translated Canon patent speak, this is what Canon has

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[Nemorino]

We have seen a steady progression on Canon's tilt/shift lenses that include internal tilt and shift and also auto-focus. This shows that the research is continuing in Canon and that they are considering all possible problems before it potentially comes to market.

IMO it looks like they tested some kind of a prototype of a AF tilt lens to notice this issue.
I'm very interested in the development of such kind of lens though I probably will never can afford it.