Low power consumption, broad navigability optical mouse

摘要

An optical navigation system 200 for determining movement 221, 222 relative to a navigation terrain 220 includes a first source 203 and a second source 204 of optical radiation for illuminating 213c-213d the navigation terrain 220, the first source 203 differing 702 from the second source 204 in at least one operating parameter. The system further includes means 205 to select the first source 203 and the second source 204 independently based on decision criteria 708. The system further includes a detector 217 for capturing patterns 214g-214j in the optical radiation subsequent to illuminating 213c-213d of the navigation terrain 220.