A device and method are disclosed that measure the relative angular orientation between two surfaces. Two frames are mounted on the two surfaces to be measured. One frame has a collimated light source and a measuring scale. The other frame has a mirror. The collimated light is projected from the first frame and reflected off the mirror back to the scale on the first frame. The collimated light beam position on the scale is used to calculate the non-parallel angle between the two rolls. The method and measuring scale can be adapted to provide accurate measurement of very small, near parallel orientation angles. The two frames can be adapted to measure the angular orientation of important surfaces such as rolls or odd shapes that are otherwise difficult to measure.