Spherometer

Spherometers are small precision instruments for measuring the radius of curvature of spherical surfaces. This item is printable using any 3d printer and the printed part must be supplemented using a domed bolt or a regular bolt in combination with an acorn nut. You will also need a cheap dial gauge to take measurements. I have supplemented the STL file with an excel spreadsheet which calculates the characteristics of the lens based on the readings of the spherometer. To get this working accurat