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Cylindrical Grating Projection by Single-Shot Normal Exposure of a Radial Phase Mask

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4 Author(s)
Tonchev, S. ; Inst. of Solid State Phys., Sofia, Bulgaria ; Jourlin, Y. ; Reynaud, S. ; Parriaux, O.

A periodic grating is defined at the photoresist-coated wall of a circular cylinder with an integer number of particularly long grooves parallel to the generic lines by the holistic exposure of a radial phase mask to a normally incident collimated laser beam. The single-shot projected element corresponds to the inner grating of a high-resolution miniature shaft encoder.

Published in:
Photonics Journal, IEEE  (Volume:4 ,  Issue: 4 )

Date of Publication: Aug. 2012

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