Materion Balzers Optics
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Dichroic Beamsplitters

Low-loss Dichroic Beamsplitters for the UV to NIR Range

Materion Balzers Optics dichroic beamsplitters separate the incoming light in a highly reflected and transmitted part. The transition zone can be reduced to approx. 3% of the transition wavelength for random polarized light. The all-dielectric interference filters are deposited by plasmaassisted processes and show extreme environmental stability. Filter dimension, spectral characteristic and angle of incidence can be customized.

Low-loss Dichroic Beamsplitters for the UV to NIR Range

Benefits

  • Sharp separation between reflected and transmitted wavelength range
  • > 90% transmittance / reflectance
  • Long-term shift-free spectral performance
  • High environmental stability
  • Wide flexibility in filter size


Applications

  • Fluorescence detection
  • Coupling of light sources
  • Raman spectroscopy
  • Ophthalmologic surgery

Technical Data

Wavelength range

300 – 2000 nm

Reflectance

> 90 – 95%

Transmittance

> 90 – 95%, depending on requirements

Angle of incidence

Standard 45°, different AOI on request

Substrate material

Fused silica, BK7 or float glass

Dimensions

Standard size Ø25 x 3 mm or 36 x 26 x 2 mm,
other dimensions on request

Parallelism

< 3 arcmin

Surface defects

5 / 3 x 0.1

Environmental stability

Temperature –40 °C …+150 °C
Humidity up to 99%

Excitation Light & Emitted Fluorescence Light
Beamsplitters for VIS Range, AOI 45°, Fig. 1: Measured spectral transmittance and reflectance of unpolarized light at AOI=45° for VIS range beamsplitters.
Fig. 1: Measured spectral transmittance and reflectance of unpolarized light at AOI=45° for VIS range beamsplitters.
Beamsplitters for NIR Range, AOI 45°, Fig. 2:Measured spectral transmittance and reflectance of unpolarized light at AOI=45° for NIR range beamsplitters.
Fig. 2:Measured spectral transmittance and reflectance of unpolarized light at AOI=45° for NIR range beamsplitters.
Beamsplitters for UV Range, AOI 45°, Fig. 3:Measured spectral transmittance and reflectance of unpolarized light at AOI=45° for UV beamsplitter.
Fig. 3:Measured spectral transmittance and reflectance of unpolarized light at AOI=45° for UV beamsplitter.
Steep Edge Beamsplitters, AOI 45°, Fig. 4: Measured spectral transmittance and reflectance of unpolarized light at AOI=45° for steep edge beamsplitters.
Fig. 4: Measured spectral transmittance and reflectance of unpolarized light at AOI=45° for steep edge beamsplitters.
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