Non destructive measurement of cemented lens HI all,

I am trying to catalogue technical information of camera lenses to create a computer model. I have a spherometer to measure the radius of curvature of conventional lenses but I have run into a wall trying to figure out a non-destructive way to measure radius of the cemented lens elements. Is there a way by which I can either measure radius or the separate refraction indices of the connected lens elements?

Thanks!