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
Polymer bonded fibrous coating on dipped rubber articles skin contacting external surface
Substituted phenylsulfur trifluoride and other like fluorinating agents
Integrated circuit testing with power collapsed
Solid state lighting devices with cellular arrays and associated methods of manufacturing
Antimicrobial flush solutions
Curable inks comprising surfactant-coated magnetic nanoparticles
Method and laser receiver for acoustically indicating a laser beam
  Randomly Featured Patents
Urgent replication facility
System and method for avoiding deadlock
Changing chip function based on fuse states
Computer system and closed caption display method
Triorganosilylmethyl esters of .alpha.-trifluoromethylacrylic acid
Apparatus and method for installing line in conduit
Radiation-cured film web and a process for its preparation
System and method for grabbing frames of graphical data
Legged locomotion robot
Distributed caching of files in a network