Self-detecting light-emitting diode optical sensor
Journal Article (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
- December 1, 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
Citation Source
- Scopus