Materion Balzers Optics
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Notch Filters

Narrow-band Single- and Multi-Notch Filters

Unlock precise control over light by using notch filters. These filters selectively block specific wavelengths while ensuring high transmittance across the remaining spectrum. Filters provided by Materion achieve a bandwidth as narrow as 5 nm in the visible (VIS) range, providing accurate filtration for your needs. Explore the versatility of multi-notch filters, capable of blocking multiple wavelength bands to suit applications like fluorescence microscopy or Near-Infrared endoscopy. Constructed with care, our notch filters feature a complex multilayer stack which is deposited by plasma-assisted techniques. This design ensures long-term reliability and consistency in performance. Blocking wavelengths, depth, and angle of incidence can be customized to meet your unique requirements, allowing to achieve optimal results.

Narrow-band Single- and Multi-Notch Filters

Benefits

  • Selective blocking of narrow wavelength bands
  • High transmittance of more than > 95% in passband
  • Color correction possible on customer request
  • Long-term shift-free spectral performance
  • High environmental stability
  • Wide flexibility in filter size


Applications

  • Fluorescence detection
  • ICG endoscopy
  • Raman spectroscopy
  • Laser surgery
  • High-resolution microscop

Technical Data

Wavelength

per request
e.g. 488 nm, 532 nm, 561 nm, 633 nm, 780 nm

Blocking

OD4 to OD8

Transmittance

T > 95%

Angle of Incidence

standard 0°, different AOI on request

Substrate

fused silica, sapphire or floatglass

Dimensions

per customer request
standard Ø 25 mm x 3 mm

Parallelism

< 3 arcmin

Surface Defects

e.g. 5 / 1 x 0.1 per ISO 10110-7
or 20-10 per MIL-PRF-13830B

Environmental Stability

Temperature – 100 ... + 150 °C
Humidity up to 99%

Fig. 1: Measured spectral transmittance of a 15nm notch. The blocking level is OD4.
Fig. 1: Measured spectral transmittance of a 15nm notch. The blocking level is OD4.
Fig. 2: Measured spectral transmittance of a 5nm notch.
Fig. 2: Measured spectral transmittance of a 5nm notch.
Fig. 3: Notchfilter for Fluorescence endoscopy (measurement).
Fig. 3: Notchfilter for Fluorescence endoscopy (measurement).
Fig. 4: Measured spectral transmittance of a multi-band notch.
Fig. 4: Measured spectral transmittance of a multi-band notch.
Fig. 5: Measured spectral transmittance of a 15nm notch. The blocking level is OD6
Fig. 5: Measured spectral transmittance of a 15nm notch. The blocking level is OD6
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