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, wherein 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
26 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, wherein 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.
- 3. A light shield for an optoelectronic device for determining a position or movement of a second object relative to a first object, wherein the light shield comprises a number of cavities that define a plurality of channels, forming light-beam paths from the first object to he second object, wherein the plurality of channels 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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5. A light shield for an optoelectronic device for determining a position or movement of a second object relative to a first object, the second object being substantially flat and mounted in substantially parallel spaced relation to the first object, wherein the light shield is adapted to be mounted between the first object and the second object and comprises a plurality of channels, each of which forms a light beam path adapted to extend between the first object and the second object.
Specification