All you need to
know.

Modern hardness testing machines use a camera system for performing optical hardness tests. In the majority of cases, this consists of a digital camera with 1.3 megapixel resolution, a light source and lenses with various magnification strengths.

The camera system is used for two different processes. Firstly, it is used to determine the position of the hardness test, but the main purpose of the camera system is to manually or automatically evaluate the hardness test indents. In order to keep operator influence during hardness testing to a minimum, the camera system carries out focusing, brightness control and evaluation of the indent fully automatically. This guarantees a maximum level of repeat accuracy.