Resources Contact Us Home
Optical equipment with device for detecting direction of visual axis

Image Number 16 for United States Patent #5485241.

An optical apparatus with a visual axis detecting device for converting the light reflected from the eyeball into an electrical signal and calculating the direction of visual axis from the electrical signal.Plural pairs of illuminating light sources are provided around the view finder, and one of the pairs is turned on to illuminate the eyeball, according to the output of a position detector detecting whether the optical apparatus is in a vertical or horizontal position, or of a distance detecting circuit for detecting the distance between the view finder and the eyeball, or of a judging circuit for judging whether the photographer wears spectacles or not, thereby enabling precise detection of the direction of visual axis.

  Recently Added Patents
Triazine ring-containing polymer and film-forming composition comprising same
Cis-alkoxy-substituted spirocyclic 1-H-pyrrolidine-2,4-dione derivatives
Method for maintaining a driver-independent braking intervention after a collision
Browsing or searching user interfaces and other aspects
Scanning of a touch screen
  Randomly Featured Patents
Lie-in tape dispenser
Surface acoustic wave passive transponder having amplitude and phase-modifying surface pads
Moisture-permeable waterproof fabric and release sheet-attached moisture-permeable resin film used for production of moisture-permeable waterproof fabric
Antimicrobial peptides
Statistical approach for optimal use of genetic information collected on historical pedigrees, genotyped with dense marker maps, into routine pedigree analysis of active maize breeding populat
Terahertz frequency domain spectrometer with controllable phase shift
Optimization of integrated circuit design and library
Selectively configurable misting apparatus
Peptide antagonists of TGF-beta family members and therapeutic uses thereof
Method and apparatus for isolating inactive fuel passages