3M Innovative Properties Company

Tomasz A Pol

Patrick Rene Destain

Stephen J Willett

William E Phillips, Iii

John E Duncan

Michael W O'Keefe

Jennifer L Grace

Alexander A Glinski

Allen Y Yi

Michael Hezlep

A projection subsystem includes a light engine that provides a collection lens, a collimator and at least one solid state light emitter. A projection lens assembly receives the image and provides a projection beam having a luminous flux level. The projection subsystem has a portability efficacy.

Optical projection subsystem

A polishing system for polishing a surface of a substrate, such as the surface of an optical pin mold, to a desired surface finish and profile under the automated control of a computer during a polishing cycle. The polishing system includes a polishing spindle assembly that holds and rotates a polishing tool that is contacted under pressure with a surface of the mold pin. A torque sensor is associated with the polishing spindle assembly to sense a torque on the polishing tool during the polishing cycle. The polishing system further includes a feedback control system that dynamically adjusts the position of the polishing spindle assembly in response to the torque sensed by the torque sensor to maintain a substantially constant torque on the polishing tool during the polishing cycle.

Automated polishing apparatus and method of polishing

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Cincinnati, OH, United States of America

Tomasz A Pol