Knife Edge Diffraction for Spatially Extended Light Sources

Christian Mentin, Robin Priewald, Eugen Brenner

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The position of an object’s edge can be
determined from its shadow projected onto a CCD or
CMOS sensor without any additional optical elements
such as lenses. Nevertheless, in many applications a
collimated Laser light beam is used to illuminate the
measured object. Since laser diodes are often
complicated in handling, and mostly need additional
expensive Laser driver hardware, new approaches
were considered. Spatially extended light sources such
as off-the-shelf LEDs could be used for edge detection
in combination with diffraction pattern analysis,
without the need of any additional collimation optics
for illumination. Results and applicability for simple
position measurement are discussed.
Original languageEnglish
Title of host publicationProceedings of the 21ST IMEKO TC-4 INTERNATIONAL SYMPOSIUM ON UNDERSTANDING THE WORLD THROUGH ELECTRICAL AND ELECTRONIC MEASUREMENT, and 19TH INTERNATIONAL WORKSHOP ON ADC MODELLING AND TESTING
Pages134-139
Number of pages6
Publication statusPublished - 7 Sep 2016
Event21ST IMEKO TC-4 INTERNATIONAL SYMPOSIUM ON UNDERSTANDING THE WORLD THROUGH ELECTRICAL AND ELECTRONIC MEASUREMENT - Budapest, Hungary
Duration: 7 Sep 20169 Sep 2016

Conference

Conference21ST IMEKO TC-4 INTERNATIONAL SYMPOSIUM ON UNDERSTANDING THE WORLD THROUGH ELECTRICAL AND ELECTRONIC MEASUREMENT
CountryHungary
CityBudapest
Period7/09/169/09/16

Keywords

  • CCD Sensor
  • Knife Edge Diffraction

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