Method and apparatus for alignment adjustment of encoder systems

A method performed on a configurable encoder system having a pixel array, the method comprising:

• adjusting a pixel pattern by comparing phase variation or amplitude variation for a first plurality of pixel array mappings over a first set of spatial offsets and selecting a first pixel array mapping from the first plurality of pixel array mappings, based on comparing phase variation or amplitude variation;
• further adjusting the pixel pattern by comparing phase variation or amplitude variation for a second plurality of pixel array mappings over a second set of spatial offsets and selecting a second pixel array mapping from the second plurality of pixel array mappings, based on comparing phase variation or amplitude variation;
• and
• after selecting the first and second pixel array mappings, storing the adjusted pixel pattern to a memory device that is in communication with a controller of the configurable encoder system.

An encoder system, comprising:

• a configurable detector array including a plurality of detectors;
• a memory configured to store a plurality of partition maps, wherein each partition map defines a state for each of the detectors;
• and
• a controller operable to execute computer-readable code to perform following operations:
• adjusting a first partition map according to a misalignment in the encoder system;
• and
• configuring the configurable detector array according to the adjusted first partition map.

A method of adjusting an optical encoder system, comprising:

• retrieving a partition map from a memory;
• configuring a configurable photodetector array based on the partition map, the configurable photodetector array comprising a plurality of photodetectors, wherein each photodetector in the configurable photodetector array is assigned a state by the partition map;
• performing a misalignment detection by measuring outputs from the plurality of photodetectors, wherein the outputs correspond to light modulated by a motion object;
• adjusting the partition map according to the misalignment detection, thereby generating an adjusted partition map;
• and
• storing the adjusted partition map in the memory.