| 摘要 |
The present disclosure relates to optical touch sensing technology. Provided is an apparatus comprising an emitting optical waveguide comprising input and output areas, an emitting optical distributed band pass filter disposed at the output area, a receiving waveguide disposed at a spaced apart location from the emitting waveguide, and a receiving distributed band pass filter at an input area of the receiving waveguide. The apparatus may comprise a tunable light source for cycling through a plurality of frequency bands of light for scanning a length of the waveguides for an obstruction (e.g. a touch). The apparatus may be used in place of the plurality of light source/photo detector pairs found in conventional touch screen devices. |
