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US 12,764,403 B2Granted
Optical flow sensor
Assigneeams-OSRAM Asia Pacific Pte. Ltd.
InventorsFrancesco Paolo D'Aleo, Jens Geiger, Markus Rossi
Life of this patent
Estimating the term…
Abstract
An optical device includes a sensor and a mask structure. The mask structure is configured to provide a first mask covering at least a part of the sensor and a second mask covering at least a part of the sensor. The second mask is the anti-mask of the first mask, and the sensor is configured to provide first output signals for light transmitted through the first mask and second output signals for light transmitted through the second mask.
Claims15
An optical device comprising:
- a sensor;
- a mask structure configured to provide a first mask covering at least a part of the sensor and a second mask covering at least a part of the sensor, wherein the second mask is the anti-mask of the first mask, and wherein the sensor is configured to provide first output signals for light transmitted through the first mask and second output signals for light transmitted through the second mask;
- and
- at least one processor configured to:
- calculate a first derivative with respect to time from the first output signals;
- calculate a second derivative with respect to time from the second output signals;
- and
- sum the first derivative and the second derivative to form a summed derivative.
5 more elements
A method of determining a movement of an object, the method comprising:
- receiving with a sensor light from the object transmitted through a first mask and providing first output signals;
- receiving light with the sensor from the object transmitted through a second mask and providing second output signals, wherein the second mask is the anti-mask of the first mask;
- and
- determining a velocity and/or trajectory of the object from the first and second output signals by:
- calculating a first derivative with respect to time from the first output signals;
- calculating a second derivative with respect to time from the second output signals;
- summing the first derivative and the second derivative to form a summed derivative;
- and
- determining the velocity and/or trajectory from the summed derivative.
6 more elements
Dependencies are inferred from the claim text.