5 September 2014 Novel optical encoder for harsh environments
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We are presenting a new optical encoder architecture for shaft encoding, both in incremental and absolute modes. This encoder is based on a diffractive optics technology platform. We have developed various disk based rotary diffractive encoders previously. This encoder is different in the way it is not a disk composed of successive gratings or computer generated holograms, but rather composed of a single element placed on the shaft. It is thus best suited for hollow shaft or end of shaft applications such as in encoder controlled electrical motors. This new architecture aims at solving some of the problems encountered with previous implementations of diffractive encoders such as disk wobble, disk to shaft centering and also encoding in harsh environments.
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Bernard Kress, Bernard Kress, Ulrich Mueller, Ulrich Mueller, Vincent Brac-de-la-Perriere, Vincent Brac-de-la-Perriere, "Novel optical encoder for harsh environments", Proc. SPIE 9202, Photonics Applications for Aviation, Aerospace, Commercial, and Harsh Environments V, 92020B (5 September 2014); doi: 10.1117/12.2062057; https://doi.org/10.1117/12.2062057

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