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Diffractive Micro-Optics

What are DOEs?

 

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DOEs or Diffractive Optical Elements are optical components with microscopic structures on them, not larger than the thickness of a hair. The microscopic structures diffract an incident laser beam, such that a desired light pattern is generated.

They have the advantage of combining more than one optical functionality in one single component. Moreover they are so small and light that they can be realized on flexible and thin materials.

What are the applications of DOEs ?

  • They can be used for a variety of different applications. Examples:
  • project a line for measuring the height
  • convert a single laser beam into a square grid or fan-out of beams
  • A reading head of a CD or DVD with DOE (left) is much lighter and compacter than a classical one (right)
  • project your logo

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With the diffractive elements on the plastic card in the EduKit you can project the following figures on a screen:

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linear array of
 light point		 4_20.jpg
square array of
 light points		 4_21.jpg
square grid
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top-hat light
 distribution		 4_23.jpg
the NEMO logo		 4_24.jpg
the European
flag

More information on NEMO’s Educational Kit: ‘Learn and Teach Micro-optics’ can be found on the website: www.micro-optics.org

nemo logo

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