Patent ID: 8330720

Claim:
An optical navigation system comprising: a housing including an aperture; a calibration cover having an interior surface, the calibration cover being configured to be positioned to cover the aperture of the housing; an image sensor having an array of photosensitive elements configured to capture frames of image data of the interior surface of the calibration cover when the interior surface of the calibration cover is positioned in the field of view of the image sensor and to capture frames of image data of a navigation surface when the calibration cover is not positioned in the field of view of the image sensor; and a self-calibration module operably connected to the image sensor, the self-calibration module being configured to detect a performance-related change of the system using the frames of image data of the interior surface of the calibration cover, the self-calibration module being further configured to initiate a predefined procedure in response to the performance-related change of the system.