Papers Published

1. Johnson, Mark and Jokerst, Nan Marie, SELF-DETECTING LIGHT-EMITTING DIODE OPTICAL SENSOR., Journal of Applied Physics, vol. 56 no. 3 (1984), pp. 869 - 871 [1.334026] .
   (last updated on 2007/04/16)

   Abstract:
   A light-emitting diode can be used simultaneously for illumination of a moving object and also for detection of its own reflected light. The result is a novel optical object proximity sensor of very small size and high resolution. Good performance depends on the design of a suitable low-noise electronic preamplifier, on the choice of light-emitting diode material and bias, and on efficient optical design using a mirror or thin-film retroreflector. This optimization is analyzed and implemented. 6 refs.

   Keywords:
   SENSORS;