Notch filters provide narrow-band selective blocking of specific wavelengths while maintaining high transmittance across the remaining spectrum. These filters enable precise control over light, essential for applications requiring accurate wavelength filtration such as fluorescence microscopy, Raman spectroscopy, and medical imaging.
Materion offers a comprehensive range of notch filters designed for exceptional spectral performance, environmental stability, and customization flexibility.
Narrow-Band Single-Notch Filters
Engineered to block a single, narrow wavelength band with bandwidths as tight as 5 nm in the visible (VIS) range, these filters deliver high transmittance (>95%) outside the blocked region. Their multilayer design, deposited via plasma-assisted techniques, ensures long-term spectral stability and durability.
Multi-Notch Filters
Capable of blocking multiple wavelength bands simultaneously, multi-notch filters provide versatile solutions for complex optical systems such as near-infrared endoscopy and advanced fluorescence detection. Customizable blocking wavelengths, depths, and angles of incidence allow precise tailoring to your application needs.
Customizable Filter Dimensions and Substrates
Filters are available on fused silica, sapphire, or float glass substrates, with dimensions tailored to customer specifications. Standard sizes include Ø 25 mm × 3 mm, with options for different angles of incidence and parallelism to meet stringent optical requirements.
Benefits
- Selective blocking of narrow wavelength bands
- High transmittance (>95%) in passbands
- Long-term, shift-free spectral performance
- Excellent environmental stability (temperature and humidity)
- Flexible filter sizes and custom color correction options
Applications
- Fluorescence microscopy and detection
- Indocyanine green (ICG) endoscopy
- Raman spectroscopy
- Laser surgery
- High-resolution microscopy
