Optical positioning device with multi-row detector array
First Claim
1. An optical displacement sensor for sensing relative movement between a data input device and a surface by determining displacement of optical features in a succession of images of the surface, the sensor comprising:
- a plurality of linear comb arrays (LCAs) arranged along an associated axis, wherein each LCA comprises a row of photosensistive elements parallel to the associated axis.
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Accused Products
Abstract
One embodiment relates to an optical displacement sensor for sensing relative movement between a data input device and a surface by determining displacement of optical features in a succession of images of the surface. The sensor includes a plurality of linear comb arrays (LCAs) arranged along an associated axis. Each LCA comprises a row of photosensistive elements parallel to the associated axis. Another embodiment relates to a method of sensing movement of a data input device across a surface. An intensity pattern of light reflected from an illuminated portion of the surface is detected using a first plurality of linear comb arrays (LCAs) arranged along a first axis and a second plurality of LCAs arranged along a second axis not parallel to the first axis. Other embodiments are also described.
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Citations
20 Claims
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1. An optical displacement sensor for sensing relative movement between a data input device and a surface by determining displacement of optical features in a succession of images of the surface, the sensor comprising:
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a plurality of linear comb arrays (LCAs) arranged along an associated axis, wherein each LCA comprises a row of photosensistive elements parallel to the associated axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of sensing movement of a data input device across a surface, the method comprising:
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detecting an intensity pattern of light reflected from an illuminated portion of the surface using a first plurality of linear comb arrays (LCAs) arranged along a first axis and a second plurality of LCAs arranged along a second axis not parallel to the first axis, and wherein each LCA in the first plurality comprises a plurality of photosensistive elements in a row parallel to the first axis, and wherein each LCA in the second plurality comprises a plurality of photosensitive elements in a row parallel to the second axis. - View Dependent Claims (15, 16, 17, 18, 19)
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20. An optical positioning apparatus, the apparatus comprising:
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a coherent light source;
illumination optics configured to illuminate a surface area with light from the coherent light source;
imaging optics configured to project a speckle pattern of light from the illuminated surface area; and
a detector including a first plurality of linear comb arrays oriented along a first axis and a second plurality of linear comb arrays oriented along a second axis which is not parallel to the first axis.
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Specification