Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Absolute optical encoder system










Image Number 12 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
Persistent luminescence nanoparticles used in the form of a diagnosis agent for in vivo optical imaging
Light fitting
Data storage device and block selection method for a flash memory
System and method for multi-threaded OFDM channel equalizer
Optical multiplexer/demultiplexer
Apparatus and method for sterilizing vessel with electron beam
Decoration holder
  Randomly Featured Patents
Ignition means for rotary piston engines
Retaining structure for pressurized gas cylinders
Release mechanism for downhole tool
Urinary applicance
Temperature adaptive circuit, circuit temperature raising method and circuit temperature raising program
Single component, aqueous, polyurea coating compositions
Telephone artery with multiple access points and telephone networks with such arteries
Active material for pressed nickel electrodes
Floating point square root and reciprocal square root computation unit in a processor
Email integrated instant messaging