POSITION DIGITIZER WAVEGUIDE ARRAY WITH INTEGRATED COLLIMATING OPTICS

摘要

XY position digitizer (10) has an X send substrate (11X) with an associated X receive substrate (12X), and a Y send substrate (11Y) with an associated Y receive substrate (12Y), defining free space region (10F) therebetween. Send waveguides (13X) are embedded in the X send substrate and send waveguide (13Y) are embedded in the Y send substrate. The send waveguides sends an array of send light beams (15X) across the free space region to the X receive substrate. The send waveguides likewise sends an array of send light beams (15Y) across the free space region to the Y receive substrate. Receive waveguides (16X) are embedded in the X 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 system (18X) 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.