Optoelectronic device for determining relative movements or relative positions of two objects
First Claim
1. A light shield for an optoelectronic device which determines relative movements or relative positions of two objects, the light shield comprising a plurality of channels, each of which forms a path for a light beam between a light-emitting element and a detector of the optoelectronic device, characterized in that the light shield has a generally hollow structure with a number of cavities that form individual light path channels between each light-emitting element and its respective detector, and in that at least two of said channels define light paths which converge with one another from the light-emitting elements to the respective detector.
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Accused Products
Abstract
The present invention relates to an optoelectronic device for determining relative movements or relative positions of two objects, comprising a first object fixed relative to a frame of the device; a second object mounted in spaced relation to the first object and adapted for movement relative thereto; and a plurality of measuring cells for determining movement or displacement of the second object relative to the first object. Each measuring cell comprises a light-emitting element and a detector for detecting light from the light-emitting element. The invention provides a light shield for the optoelectronic device, the light shield comprising a plurality of channels which together define a non-planar or three-dimensional array of light beam paths between the first and second objects of the optoelectronic device.
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Citations
14 Claims
- 1. A light shield for an optoelectronic device which determines relative movements or relative positions of two objects, the light shield comprising a plurality of channels, each of which forms a path for a light beam between a light-emitting element and a detector of the optoelectronic device, characterized in that the light shield has a generally hollow structure with a number of cavities that form individual light path channels between each light-emitting element and its respective detector, and in that at least two of said channels define light paths which converge with one another from the light-emitting elements to the respective detector.
Specification