Here I attach the auto-alignment telescope design circulated by Yuefan. Just copy Yuefan design.
distance from FI to lens1 | focal length of lens1 | distance from lens1 to QPD1 | |
NF | 0.975m | 500mm | 0.65m |
distance from lens1 to lens 2 | focal length of lens2 | distance from lens2 to QPD2 | |
FF | 0.454m | -50mm | 0.6m |