Resources Contact Us Home
Absolute optical encoder system

Image Number 13 for United States Patent #4445110.

An optical code disc includes a fine track which provides a high resolution signal, at least one V scan natural binary track synchronized to the fine track by lead and lag detectors, and Gray code tracks which provide the most significant bits of the digital output of the encoder system. The number of circuit elements in the multiplier circuitry associated with the fine track are reduced by means of a quadrant switching technique whereby the sinusoidal inputs to the multiplier are repeated through each quadrant of the fine track cycle. The V scan and Gray code tracks are optically multiplexed to reduce the number of leads from the optical detector. The use of both V scan and Gray code tracks minimizes the number of detectors required in the system while maintaining large detector signals from each track. The V scan and Gray code outputs are synchronized by the use of an overlapping bit.

  Recently Added Patents
System and method for broadcasting rich media to devices over multiple carriers
Electrode assembly with centrally wound separator member
Cache memory control device, semiconductor integrated circuit, and cache memory control method
Manufacturing aircraft parts
Creating three dimensional graphics data
Distributive data capture
Switchgear operating apparatus and three-phase switchgear
  Randomly Featured Patents
Optical navigation aid within a beacon field
Antidandruff shampoo composition having improved suspension properties
Balance control system for multichannel audio apparatus
Dispenser and dosing subassembly for dosing of a medium
Cookie preservation when switching devices
Switching device
Weighing scale for individual wheels of a tandem set of wheels
N-hydroxyformamidine derivatives
Method of making light guide member
Extensible ratchet wrench