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:
Aug. 04, 1992
Filed:
Jul. 23, 1990
J Allen Cox, New Brighton, MN (US);
Bernard S Fritz, Eagan, MN (US);
Honeywell Inc., Minneapolis, MN (US);
Abstract
A ultra-compact optical readout device utilizing a binary optical element that provides a wide separation between diffraction efficiency peaks of different polarization modes so that sending and returning light can take distinct paths at the light source and detector, respectively, and also take the same paths at other regions of the device, enabling the simultaneous emission and detection of light for reading information from optical media. The specially designed contour of the binary optical diffracting element also provides the device with focussing capabilities without the need for a cylindrical lens at the detector or light source.