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
Antenna array system
Utility knife
Converter and measuring apparatus
Soybean EF1A promoter and its use in constitutive expression of transgenic genes in plants
System and method of automatic piloting for in-flight refuelling of aircraft, and aircraft comprising said system
Method and system for dynamic storage tiering using allocate-on-write snapshots
Virtual multi-cluster clouds
  Randomly Featured Patents
Layout editing device and computer program product
Safety belt applying system
Dual disc adapter with downward sloping outside corner wedges
Systems providing dynamic undeployment of services in a computing network
Process for removing distance measurement ambiguity and a radar using this process
Projection display apparatus
Wafer-scale semiconductor integrated circuit device and method of forming interconnection lines arranged between chips of wafer-scale semiconductor integrated circuit device
Apparatus with etchant mixing assembly for removal of unwanted electroplating deposits
Liquid cooled laser bar arrays incorporating diamond/copper expansion matched materials
Container rod assembly