Kenyon & Kenyon
Optical position-measuring device
An optical position-measuring device is described, that includes a scale and a scanning unit movable relative thereto, a light source, one or more scanning graduations, at least one opto-electronic detector element and a mirror lens arranged downstream of the light source. The mirror lens includes a plane reflector surface and two partial surface areas having different radii of curvature. The beams entering through a first partial surface area impinge on the reflector surface and are reflected from the reflector surface in the direction of the second partial surface area. A collimated beam exists subsequent to exiting the second partial surface area.
Dr. Johannes Heidenhain GmbH
G
G01D
inventional
Heinz Wolfgang
Tovar Holzapfel