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:
Jan. 30, 2001
Filed:
Jan. 10, 2000
Daniel A. Francis, Oakland, CA (US);
David S. Graham, Mountain View, CA (US);
Poa Sana, Inc., San Jose, CA (US);
Abstract
XY position digitizer,has an X send substrate,X with an associated X receive substrate,X, and a Y send substrate,Y with an associated Y receive substrate,Y, defining free space region,F therebetween. Send waveguides,X are embedded in the X send substrate and send waveguides,Y are embedded in the Y send substrate. The send waveguides sends an array of send light beams,X across the free space region to the X receive substrate. The send waveguides likewise sends an array of send light beams,Y across the free space region to the Y receive substrate. Receive waveguides,X are embedded in the X receive substrate and receive waveguides,Y are embedded in the Y receive substrate in correspondence with the X and Y send waveguides. Each receive waveguide receives at least a portion of the light beam from the corresponding send waveguide. An array of X send optical systems,X are embedded in the X send substrate. One send optical system is in precise optical alignment with each send waveguide, for enhancing the collimation of the constrained send light from that aligned send waveguide.