Optical navigation system with multiplexed image processing
View Patent ↗An optical navigation system having two or more optical pipelines for image acquisition and a single multiplexed optical array. Each of the two or more optical pipelines for image acquisition may include an illuminator that emits optical radiation at a navigation surface where each navigation surface is separate from the other navigation surfaces. The single multiplexed optical array may be configured to receive optical radiation reflected from the respective navigation surfaces. The optical navigation system may further include illuminator drivers that control each of the optical pipelines for image acquisition and an optical sensor that is configured to multiplex the images recovered by the optical pipelines for image acquisition and perform image correlation for the different navigation surfaces.
1. An optical navigation system with multiplexed imaging (“ONS-MI”), the ONS-MI comprising:
a first optical pipeline capable of image acquisition from a first navigation surface;
a second optical pipeline capable of image acquisition from a second navigation surface, the second navigation surface being separate from the first navigation surface such that relative motion of the second navigation surface is independent of relative motion of the first navigation surface; and
an optical sensor capable of receiving and processing images from the first optical pipeline and the second optical pipeline.
2. The ONS-MI of claim 1 , wherein the first optical pipeline includes at least one light source configured to emit emitted optical radiation at the first navigation surface and the second optical pipeline includes at least one light source configured to emit emitted optical radiation at the second navigation surface.
3. The ONS-MI of claim 2 , wherein the at least one light source of the first optical pipeline is chosen from a group consisting of a light emitting diode (“LED”), a photo-cathode, a vertical cavity surface-emitting laser (“VCSEL”), an edge-emitting laser, and a light bulb, and the at least one light source of the second optical pipeline is chosen from a group consisting of an LED, a photo-cathode, a VCSEL, an edge-emitting laser, and a light bulb.
4. The ONS-MI of claim 2 , wherein the optical sensor is configured to receive the emitted optical radiation reflected from the first navigation surface and to receive the emitted optical radiation reflected from the second navigation surface.
5. The ONS-MI of claim 4 , wherein the optical sensor includes at least one illuminator driver configured to power on and power off the first optical pipeline and the second optical pipeline.
6. The ONS-MI of claim 5 , wherein the at least one illuminator driver is configured to power off the second optical pipeline when the optical sensor is receiving reflected optical radiation from the first navigation surface and to power off the first optical pipeline when the optical sensor is receiving reflected optical radiation from the second navigation surface.
7. The ONS-MI of claim 6 , wherein the at least one illuminator driver is configured to modify the power on and off interval of the first optical pipeline and the second optical pipeline.
8. The optical navigation system of claim 7 , wherein the duration of the power on and off interval of the first optical pipeline and the second optical pipeline is adjusted responsive to the rate of motion of the first navigation surface and the second navigation surface, respectively.
9. The optical navigation system of claim 7 , wherein the duration of the power on and off interval of the first optical pipeline and the second optical pipeline is adjusted responsive to a predetermined programmable set of criteria.
10. The ONS-MI of claim 1 , further including memory in signal communication with the optical sensor wherein images received from the first navigation surface and from the second navigation surface are stored.
11. The ONS-MI of claim 1 , further including at least one other optical pipeline capable of image acquisition from at least one other navigation surface.
12. A method for navigating an optical navigation system on a plurality of navigation surfaces, the method comprising:
emitting emitted optical radiation from a first light source to a first navigation surface;
emitting emitted optical radiation from a second light source to a second navigation surface, the second navigation surface being separate from the first navigation surface such that relative motion of the second navigation surface is independent of relative motion of the first navigation surface; and
receiving reflected optical radiation from the first navigation surface and from the second navigation surface at an optical sensor.
13. The method of claim 12 , wherein the optical sensor includes at least one illuminator driver configured to power on and power off the first light source and the second light source.
14. The method of claim 13 , further including:
powering on the first light source and powering off the second light source for a first predetermined time interval;
receiving reflected optical radiation from the first navigation surface at the optical sensor;
after expiration of the first predetermined time interval, powering off the first light source and powering on the second light source for a second predetermined time interval; and
receiving reflected optical radiation from the second navigation surface at the optical sensor.
15. The method of claim 14 , further including adjusting the duration of the first predetermined time interval and the second predetermined time interval responsive to the rate of motion of the first navigation surface and the second navigation surface, respectively.
16. The method of claim 15 , further including storing images received from the first navigation surface and from the second navigation surface in memory.
17. The method of claim 16 , further including:
storing images received from the first navigation surface and from the second navigation surface in memory;
retrieving stored images received from the first navigation surface when powering on the first light source; and
retrieving stored images received from the second navigation surface when powering on the second light source.
18. An optical navigation system with multiplexed imaging (“ONS-MI”), the ONS-MI comprising:
means for emitting emitted optical radiation from a first light source to a first navigation surface;
means for emitting emitted optical radiation from a second light source to a second navigation surface, the second navigation surface being separate from the first navigation surface such that relative motion of the second navigation surface is independent of relative motion of the first navigation surface; and
means for receiving and processing images reflected from the first navigation surface and from the second navigation surface.
19. The ONS-MI of claim 18 , wherein the means for emitting emitted optical radiation from the first light source and from the second light source is a vertical cavity surface-emitting laser (“VCSEL”).
20. The ONS-MI of claim 19 , wherein the means for receiving and processing images reflected from the first navigation surface and from the second navigation surface is an optical sensor configured to power on and to power off the first light source and the second first light source at predetermined intervals.