1. A system for determining geometric characteristics of a reflective surface of a specimen, the system comprising: a target structure including a plurality of feature points configured to be reflected in the reflective surface of the specimen; an imaging system including a camera, the camera comprising a lens and an image sensor, the lens configured to focus light from the reflective surface on the image sensor and the image sensor configured to capture an image including the plurality of feature points of the target structure; and a beam splitter configured to direct light (i) from the target structure to the reflective surface and (ii) from the reflective surface to the camera.