18 September 2007 Optical encoder based on a nondiffractive beam
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Nowadays most industrial and laboratory motion measuring equipment makes use of optical encoders to measure rotation and linear displacements with sub-micrometrical resolution. In this work we introduce a new design of an optical encoder based on a non diffractive beam, a binary amplitude grating and a monolithic photodetector. Two theoretical models of the system are proposed and implemented to obtain numerical results. The performance of the design is also investigated through experimental measurements. Finally, the experimental results are compared with the models predictions.
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A. Lutenberg, A. Lutenberg, F. Perez Quintián, F. Perez Quintián, M. A. Rebollo, M. A. Rebollo, "Optical encoder based on a nondiffractive beam", Proc. SPIE 6667, Current Developments in Lens Design and Optical Engineering VIII, 666707 (18 September 2007); doi: 10.1117/12.731228; https://doi.org/10.1117/12.731228

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