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

S. Tonchev (1) , Yves Jourlin (1) , S. Reynaud (1) , O. Parriaux (1)

1 LHC - Laboratoire Hubert Curien

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.

Domains: Optics [physics.optics]

S. Tonchev, Yves Jourlin, S. Reynaud, O. Parriaux. Cylindrical Grating Projection by Single-Shot Normal Exposure of a Radial Phase Mask. IEEE Photonics Journal, 2012, 4 (4), pp.1170-1177. ⟨10.1109/JPHOT.2012.2207096⟩. ⟨ujm-00726382⟩