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:
Dec. 27, 2005
Filed:
Feb. 20, 2004
Jacob Moskovich, Cincinnati, OH (US);
Jacob Moskovich, Cincinnati, OH (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
An optical system for use in a head-mounted display is provided which includes a microdisplay () and a magnifier () for producing a magnified image of the microdisplay for viewing by a human eye. The magnifier () includes a diffractive surface and has in order: a first element () having a first surface (S) which is convex in the direction of the long conjugate, a block () of optical material, and a second element () having a second surface (S) which is convex in the direction of the short conjugate. The first surface (S) is preferably the diffractive surface. The magnifier provides a long eye relief, a large exit pupil, and a large field of view with a minimum of components.