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Optoelectronic input device, method for production of such a device, and method for measuring the movement of an object with the help of such a device

  • US 7,368,703 B2
  • Filed: 01/22/2004
  • Issued: 05/06/2008
  • Est. Priority Date: 01/28/2003
  • Status: Active Grant
First Claim
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1. Optoelectronic input device (10) in which the input is formed by detected movements of an object (M), the device comprising an optical module (11) comprising at least one laser (1,1

  • ) with a cavity for the generation of a measuring radiation beam (S), optical means (2) for the guidance of the radiation beam (S) to a plane (V) close to the object (M) and converting means (C) for the conversion of radiation of the measuring radiation beam (S) reflected and modulated by the object (M) into an electrical signal, the converting means C being formed by the combination of the cavity of the laser (1) and measuring means (3) for the measuring of a change in the cavity during operation which is caused by the reflected radiation entering the cavity which radiation is representative of a movement of the object (M) relative to the module (11), the optical module (11) comprising the laser (1) which is mounted on a mounting board (4) with its cavity parallel to it, and the optical means (2) comprising an optical component (2) mounted on the mounting board (4) and aligned to the laser (1) from where the measuring beam (S) emitted by the laser (1) goes to the plane (V) close to the object (M), characterized in that the device (10) includes a further optical component which includes a block-shaped body (5) which is mounted next to the laser (1) directly on to the mounting board (4) and which, when viewed in projection from above the mounting board, has no overlap with the laser (1), and of which at least the uppermost part (5A) is optically transparent and of which the upper side forms the plane (V) close to the object (M).

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