OK this is my problem

I’m fabricating a large piece of glass.

The outside dimensions are 17” X 17”
It has 3.3225 degrees of wedge
The top surface has a radius of curvature of 150.51”
The bottom surface is plano or flat
I’m measuring the thickness of this wedged lens at the corners 17mm in from two edges in all 4 corners
So this means that 2 of the measurements are the same on one side (The thick edge)
And the other 2 are also the same only smaller
And 2 measurements are about 1.181” difference
I’m looking for a calculation to back calculate the center thickness based on the measurements taken at the 4 corners
The radius of curvature is centered about the 4 sides


I guess this lens is also known as an off axis lens, or a prism

If anyone needs more information e-mail me

Wayne