Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Methods and apparatus for adapting network characteristics in telecommunications systems
Wind energy system having a connection protection device
Dual-leadframe multi-chip package and method of manufacture
Method, apparatus, computer program, and computer readable storage media for controlling the insertion of tab sheets into a print job
Solid-state imaging device and method for manufacturing the same
Device and method for adjusting a chrominance signal based on an edge strength
Documentation roadmaps and community networking for developers on large projects
  Randomly Featured Patents
Device for cannulation of a hollow organ
Tool for processing light wave conductors
Gear ring pump having a housing wall with a hollow cone recess
Adjustable ergonomic brace
Container with article retaining tabs
Implementing branching operations at processing intersections in interactive applications
Auto-creation of storage resource management paths
Method and apparatus to speed transmission of CEC commands
Piezoelectric resonator with control film to increase a degree of vacuum inside the package
Azeotropic compositions of 1,1,1,4,4,4-hexafluorobutane and N-pentane and the use thereof in the production of foams