The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 01, 1985
Filed:
Jun. 13, 1983
Hewitt D Crane, Portola Valley, CA (US);
Donald H Kelly, Los Altos Hills, CA (US);
SRI International, Menlo Park, CA (US);
Abstract
A system is provided for producing a stabilized visual scotoma or aperture which comprises means for projecting the image of a visual scene along a first optical path including first and second mirrors positioned serially along the optical path. Both mirrors are mounted for rotation about an axis corresponding, respectively, to horizontal and vertical eye movements. Optical means are provided for forming an image of the eye at each of the first and second mirror with the center of rotation of the eye in each image nominally at the axes of rotation of the first and second mirrors. Control means are provided to rotate the first and second mirrors about their axes in response to eye movements. Means are provided to project an image of the scene along a second optical path to the eye of the subject including means capable of negating the compensating effect for eye movement in the first optical path. An obscuration member, which may be either an aperture or an opaque target, is positioned between the first optical path and the second optical path to respectively form an aperture or a scotoma of predetermined size and/or shape on the retina which is stabilized with respect to eye movement while the remainder of the visual scene is not.