Optical displacement sensor element

Details Optical displacement sensor element Optical displacement sensor element

G - Physics

01

D

G01D 5/26 (2006.01) G01D 5/32 (2006.01) G01H 9/00 (2006.01) G01L 11/02 (2006.01) G01S 11/14 (2006.01) H04R 23/00 (2006.01)

Patent

CA 2465299

The invention relates an optical displacement sensor element comprising two essentially flat surfaces (1,2) being separated by a cavity defined by a spacer (5) and the surfaces (1,2), the distance between the surfaces being variable, wherein a first of said surfaces (1) is positioned on an at least partially transparent carrier (3) and being provided with a reflective pattern, the pattern constituting a pattern being shaped as a diffractive lens, and said second surface (2) being a reflective surface.

La présente invention concerne un élément de détection de mouvement optique qui présente deux surfaces sensiblement planes (1, 2), séparées par une cavité définie par un système d'espacement (5) et par les surfaces (1, 2). La distance entre les surfaces est variable. Une première de ces surfaces (1) se trouve sur un support (3) au moins partiellement transparent et présente un motif de réflexion conçu sous forme d'une lentille de diffraction et la seconde surface (2) est réfléchissante.

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