Resources Contact Us Home
Absolute optical encoder system

Image Number 2 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
Remote control device and method employing random addressing
Interactive user interface for input of forecasts and risk priorities and display of related strategies in a trading system
Continuous low-temperature process to produce trans-1-chloro-3,3,3-trifluoropropene
Pseudosynchronizer for an unsynchronized bistatic radar system
Region of interest determination for X-ray imaging
System and method for determining an optimal route using aggregated route information
Side-chain crystallizable polymers for medical applications
  Randomly Featured Patents
Animal transport watering system and method
Miniature die-casting machine
Horizontal gel electrophoresis device
Hydrophone damper assembly
Programming method to reduce word line to word line breakdown for NAND flash
Temperature-controlled electric device for heating transfusion fluids
Image forming method using photothermographic material
Multi-piece apex seal structure for a rotary piston engine
Remote control unit used in vehicle