Ultra narrow spectral filter for focused beam

DESCRIPTION

• Transmission filter for (multi) spectral sensor based on the resonant grating principle
• Ultra narrow spectral filtering of focused beam/small aperture filter:
  - Angular tolerance: filtering wavelength is independent of the incident angle of the beam on the component
  - Small number of thin layers
  - Simplified and planar geometry shaped filter
• Spectral performance independent of numerical aperture of the objective
• Polarization selection possibility
• Integrable in the focal plane of an optical system
• Matrix integration of filters operating at different wavelengths for multispectral acquisitions
• Wafer level filter integration:
  - Deposition of filter
  - Patterning at pixel level
• Spectral range: visible, infrared, hyper frequency…

APPLICATIONS

• Spectroscopy
• Microscopy
• Surveillance (ex: gas detection)
• Medical diagnosis
• Environmental monitoring
• Optical sorting
• Industrial quality control
• Telecommunications