Where can i buy monochromatic coloured filters(optics):

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SUMMARY

Monochromatic colored filters, which allow only a single wavelength of light to pass through, are challenging to find due to their production complexities. The discussion highlights that achieving true monochromaticity is difficult, as pigments generally act as broad band absorbers. For effective monochromatic light sourcing, the use of a spectrometer, equipped with a collimated light source, condenser, and single slit, is recommended. This setup, however, also results in significant light loss.

PREREQUISITES
  • Understanding of monochromatic light and its properties
  • Knowledge of optical components such as prisms and diffraction gratings
  • Familiarity with spectrometer design and functionality
  • Basic principles of light collimation and condensation
NEXT STEPS
  • Research the design and operation of spectrometers
  • Learn about the principles of light collimation and its applications
  • Explore the use of diffraction gratings in optical systems
  • Investigate the limitations of pigments in producing monochromatic filters
USEFUL FOR

Optical engineers, physicists, and anyone involved in the design and application of optical systems requiring monochromatic light sources.

zak8000
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hi there i am looking for monochromatic colored filters like on the picture on the following web page:

http://en.wikipedia.org/wiki/File:Filter-optics-1.jpg
(preferably with no reflectivity)

but i have had no luck trying to find them while looking on google
 
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You will not find good monochromatic filters. Monochromatic light consists of only one wavelength. Let's assume there is a finite bandwidth of 1% to this filter (and that's not very monochromatic). So the filter would only admit 1% of the light. This would be extremely hard to produce with pigments, which are, essentially, broad band absorbers. Also the manufacturers would need to produce dozens of different ones 'just in case' someone wanted one of any specified wavelength.
If you really want a source of 'good' monochromatic light then you need a prism or diffraction grating and select light from just one angle. The optics need to be quite good so what I am saying you really want it a spectrometer of some sort. This needs a collimated source with a condenser to ensure plenty of light gets to the grating, a single slit to select the wanted light and some more optics to get the light where you need it. But the same problem arises in that you are chucking a lot of light away.
 

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