Optical tracking device
AssigneePixart Imaging Inc.
InventorFeng-Chi Liu
Life of this patent
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Abstract
An optical tracking device includes a tracking module and a rotation shaft. The tracking module includes a light source and an optical sensor. The rotation shaft is disposed corresponding to the tracking module, and includes a central axis, an outer surface, and a first end and a second end opposite to each other. The central axis penetrates through centers of the first end and the second end, the outer surface is connected between the first end and the second end and facing the tracking module, and an included angle formed between a normal planar vector of at least a portion of the outer surface and an axial direction of the central axis is greater than or smaller than ninety degrees. An angle value of the included angle is designed based on a field of illumination of the light source.
Claims18
An optical tracking device, comprising:
- a tracking module comprising a light source and an optical sensor;
- a rotation shaft disposed corresponding to the tracking module and comprising a central axis, an outer surface, and a first end and a second end opposite to each other, the central axis penetrating through centers of the first end and the second end, the outer surface being connected between the first end and the second end and facing the tracking module, an included angle formed between a normal planar vector of at least a portion of the outer surface and an axial direction of the central axis being greater than or smaller than ninety degrees;
- wherein an illumination beam emitted by the light source is reflected by the outer surface to project onto the optical sensor, an angle value of the included angle is designed based on a field of illumination of the light source.
Dependencies are inferred from the claim text.