Patents Assigned to Ferranti Technologies Limited
  • Point of observation tracking device and eye focus measuring device
    Patent number: 5980041
    Abstract: The invention relates to a point of observation tracking device comprising means (8, 12) for directing light from a holographic element (12) to the retina (4) of a user, and means for tracking the reflection of the light (12, 14) from the retina (4) thereby to provide a signal representative of the point of observation of the eye or eyes of the user.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: November 9, 1999
    Assignee: Ferranti Technologies Limited
    Inventor: John Scott Strachan