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45° Beamsplitters,
DST-Series

Special Properties

  • Low loss dielectric optical beamsplitter coating
  • Designed for unpolarized light
  • Backside broadband antireflection coated
  • Color neutral
  • Suppression of "ghost imaging"

Typical Applications

  • Low absorption and low loss partitioning of light
  • Reference measurement technology
  • Teleprompter applications
  • Laser beamsplitter
  • Sensor technology
  • Optical beamsplitter

Our dielectric beamsplitters divide incident light into a transmitted and a reflected light portion. The input surface of our DST plate beamsplitter series is vacuum deposited with a neutral, dielectric thin film coating, which determines the splitting ratio of the beamsplitter. The second beamsplitter surface is broadband antireflection coated, to drastically minimize unwanted secondary reflection, to prevent a ghost image and effectively reduce surface reflection losses. Because of the non-metallic construction, our 45°-beamsplitter plates are more durable than most metallic beamsplitters. The dielectric multilayer coating construction shows a very low absorption in the operating range, resulting in a very low loss of light energy. This is a considerable advantage over metallic beamsplitters that often absorb and lose a large amount of useful light or laser energy. Our beam splitter coatings can be customized for other transmissions, reflections and the operating wavelength ranges. Please use our coating inquiry form to request your customized beamsplitter coating.


Specifications of our DST-Beamsplitters*

 
Show typical DST500 transmission


Product Codes

(Principle ratios, given for unpolarized light at i=45°)
  • DST300 beamsplitter (T:R=30:70)
  • DST500 beamsplitter (T:R=50:50)
  • DST600 beamsplitter (T:R=60:40)
  • DST700 beamsplitter (T:R=70:30)
  • Other T:R ratio on request
  • Other angles of incidence on request

Substrates

Coatings

  • All dielectric coating design
  • Second surface broadband antireflection coated

Wavelength Range

  • approx. 400-700nm (DST500)
  • approx. 425-670nm (others)
  • T:R ratio tolerances on request

Flatness

  • Depending on substrate material and thickness

Surface Quality

  • typ. 80-50 scratch & dig (MIL-0-13830A)
  • Other on request

Other Specifications

  • Adherence according to MIL-C-675 C (tape test)
  • Abrasion resistant according to MIL-M-13508 C


*Please consider the "Notes on technical specifications"


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