Boehringer Mannheim Gmbh

Eric Ko

Maury Zivitz

Mark Eslick

A relative position detector has a photodetector arrangement for providing light and responding to the intensity of the light when reflected thereto. A member such as a cylindrical pin having a surface reflective of the light, convex to the photodetector arrangement, and movable relative thereto reflectively sweeps the light across the photodetector arrangement for responding thereto to produce a continuously-curving response indicating with its peak the position detected. The continuously-curving response can be differentiated in a peak detector for even more precise position detection. A mount which may be used for the photodetector arrangement has a support member and a member having a lower coefficient of thermal expansion slidably supported thereon, except for one fixed point.

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Houston, TX, United States of America

Eric Ko