Self-detecting light-emitting diode optical sensor

Journal Article

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.

Full Text

Duke Authors

Cited Authors

  • Johnson, M; Jokerst, NM

Published Date

  • 1984

Published In

Volume / Issue

  • 56 / 3

Start / End Page

  • 869 - 871

International Standard Serial Number (ISSN)

  • 0021-8979

Digital Object Identifier (DOI)

  • 10.1063/1.334026