Why this may be important is that to the extent the formation process operated non-orthogonally, the image on the Shroud would show some distortions. This may be one reason why there is such a variance in claimed measurements. The simple version of the process would be the image projected through a taut and therefore perpendicular Shroud. To the extent the Shroud was not perfectly flat, the image would be distorted. It is likely that Shroud image contained both orthogonal and non-orthogonal properties and that is what Adler is writing.
Now my question is this. Can we determine what part of the image is orthogonal (transmitted at a 90 degree angle to the Shroud) and what was non-orthogonal: (striking the Shroud at an oblique angle)? And, can we determine that angle and correct the image?
By the way, I am not saying that image was created by a laser. I am saying that the image formation process acted similar to a laser.