A 720nm bandpass filter is an optical component that allows specific wavelengths of light around 720nm to pass through while blocking other wavelengths. Its main parameters are as follows:

• Center Wavelength (CWL): ±2nm, precisely controlling the passband position.
• Full Width at Half Maximum (FWHM): 10nm-60nm, determining the passband width, customizable according to customer requirements.
• Blocking Range: 200-1100nm, effectively blocking light outside the passband within this range.
• Blocking Depth: OD2-OD4, meaning the maximum transmittance of light allowed in the blocking band is extremely low, effectively blocking interfering light.
• Transmittance: High peak transmittance ensures effective passage of specific wavelength light.

Types and Product Features of the 720nm Bandpass Filter

• Type: Belongs to narrowband filters, a subset of bandpass filters, with a relatively narrow passband, generally below 5% of the center wavelength value.
• Product Features
  • Monolithic design without bonding, simple and reliable structure.
  • Hard coating for long service life, with the film layer capable of withstanding certain environmental challenges.
  • Ion beam deposition ensures minimal temperature drift, maintaining stable performance across different temperature environments.
  • Application Areas:
  • Fluorescence Analysis Instruments: Such as fluorescence analyzers and microplate readers, used to select specific wavelengths of fluorescence for analysis, improving detection accuracy and sensitivity.
  • Medical and Health Equipment: In infrared medical devices, it can filter specific wavelengths of infrared light for diagnosis and treatment.
  • Optical Detection and Recognition: For example, in infrared ink recognition and facial recognition sensor systems, it enhances signals of specific wavelength light to improve recognition effectiveness.
  • Laser-Related Fields: Can be used in laser systems to select specific wavelengths of laser light, ensuring purity and stability.