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:
Jun. 10, 1997
Filed:
Oct. 25, 1993
Wolfgang Grimm, Heidenheim, DE;
Carl-Zeiss Stiftung, Heidenheim, DE;
Abstract
An image display system comprises polarization spectacles having different polarization axes with or without .lambda./4-foils of both polarization lenses forward of the eyes of the person to be tested. The system of the invention further includes an image display device for generating light with a specific direction of polarization or a specific rotational direction of the circularly polarized light. The image display device comprises essentially at least one vectograph film and at least one image screen. This arrangement can so influence the light coming from the image screen that test figures or parts thereof can be seen by only one eye or by both eyes. If the image display system is to be used as a vision testing system and the test figures are to be changed, then there is a corresponding command of a drive circuit via a memory. The drive circuit drives the image screen in a suitable manner. A color display can be provided by making an appropriate modification to the image display device.