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:
Apr. 20, 1976
Filed:
Sep. 12, 1974
Applicant:
Inventor:
John H Blanz, Concord, MA (US);
Assignee:
Narco Scientific Industries, Inc., Fort Washington, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61B / ; G03B / ; G03B / ;
U.S. Cl.
CPC ...
351 30 ; 351 23 ; 353 94 ; 353 98 ;
Abstract
An apparatus for measuring and evaluating a subject's visual field includes a projector for presenting a target image, consisting of a spot of light, at a series of selected locations within the subject's visual field. A mirror is mounted for movement about a pair of axes and is rotated to a desired attitude by step motors which control the position of the mirror about the respective axes. A light beam is directed toward the mirror and is reflected in a direction dependent on the attitude of the mirror as controlled by the step motors.