10600nm (CO2) Bandpass Filter

Emitted in the far-infrared spectrum, 10600nm light offers high sensitivity to thermal radiation and interacts uniquely with specific molecular vibrations.

  • Application 1: In industrial gas analysis, it isolates 10600nm light to accurately detect trace amounts of gases like water vapor or carbon dioxide by leveraging their distinct absorption signatures at this wavelength.
  • Application 2: For thermal imaging systems operating in harsh environments, the filter blocks unwanted wavelengths, ensuring clear 10600nm light transmission to visualize heat patterns from distant or obscured objects with enhanced precision.
  • Application 3: In remote sensing for atmospheric studies, it enables scientists to capture spectral data at 10600nm, facilitating the analysis of atmospheric composition and temperature profiles by filtering out interference from other infrared bands.

No products found
Use fewer filters or remove all

10600nm Filter Selection Guide for CO₂ Laser Protection and Gas Sensing Applications

I. CO₂ Laser Protection Systems

Application Scenario:

CO₂ lasers (wavelength: 10600nm) are widely used in industrial cutting and medical aesthetics (e.g., fractional laser therapy). In these scenarios, operators must wear protective eyewear or install optical path shielding to prevent laser-induced damage to human eyes or sensitive components.

Filter Configuration Requirements:

  1. Central Wavelength: Strictly matched to 10600nm to ensure targeted absorption or reflection of CO₂ laser energy.
  2. Cut-off Depth: Must achieve an optical density (OD) of 6 or higher, providing attenuation of >99.9999% for 10600nm laser radiation.
  3. Substrate Material: Select germanium (Ge) or zinc selenide (ZnSe) for their high transmittance at 10600nm and high laser damage thresholds.
  4. Bandwidth: Narrow bandwidth design (e.g., 10nm) to eliminate leakage of adjacent wavelengths (e.g., 10500–10700nm).
  5. Coating Process: Use hard-coating techniques (e.g., ion-beam assisted deposition) to enhance film stability and scratch resistance.

Selection Rationale:

  • Safety: OD6-level attenuation reduces laser energy to below safe thresholds, protecting operators from irreversible ocular damage.
  • Interference Resistance: Narrow bandwidth excludes non-target wavelengths (e.g., 10.2μm Er:YAG laser), ensuring dedicated protection.
  • Durability: Ge substrates and hard coatings withstand mechanical shocks and thermal stress in industrial environments, extending service life.

II. CO₂ Gas Concentration Sensing

Application Scenario:

In environmental monitoring and industrial exhaust analysis, infrared absorption spectroscopy is used to detect CO₂ concentration. CO₂ exhibits a characteristic absorption peak near 10600nm, requiring filters to accurately extract this spectral signal.

Filter Configuration Requirements:

  1. Central Wavelength: Precisely aligned with the CO₂ absorption peak (10600nm), with a tolerance controlled within ±5nm.
  2. Bandwidth: Narrow bandwidth design (20–50nm) to avoid interference from adjacent water vapor (e.g., 10.3μm) or other gas (e.g., CH₄) absorption bands.
  3. Transmittance: >85% to enhance detection sensitivity, enabling identification of low-concentration CO₂ (ppm levels).
  4. Substrate Material: Choose silicon (Si) or chalcogenide glass (e.g., Ge-As-Se) for their low infrared absorption coefficients (<0.01cm⁻¹), minimizing optical loss.
  5. Cut-off Range: Covers UV to 11μm, with deep cut-off of the 10.3μm water vapor band (OD>2).

Selection Rationale:

  • Sensitivity: High transmittance combined with narrow bandwidth amplifies CO₂ absorption signals, reducing the detection limit to 0.1ppm.
  • Noise Immunity: Deep cut-off of adjacent bands eliminates environmental interference (e.g., humidity fluctuations), improving data accuracy.
  • Environmental Stability: Chalcogenide glass substrates maintain optical performance in high-temperature, high-humidity conditions, suitable for long-term online monitoring.

III. Key Parameter Comparison for Selection

Core parameter differences between the two applications:

  • Central Wavelength:

Both require strict alignment to 10600nm with ±5nm tolerance.

  • Bandwidth:

- CO₂ Laser Protection: Narrower bandwidth (10nm) to prevent adjacent wavelength leakage.

- CO₂ Gas Sensing: Moderate narrow bandwidth (20–50nm) to balance signal extraction and interference resistance.

  • Cut-off Depth:

- Laser Protection: OD6+ for safe attenuation of high-energy laser beams.

- Gas Sensing: OD>2 for basic suppression of interfering bands (e.g., 10.3μm water vapor).

  • Substrate Material:

- Laser Protection: Prioritize Ge/ZnSe for high transmittance and laser resistance.

- Gas Sensing: Prioritize Si/chalcogenide glass for low absorption loss and environmental adaptability.

  • Coating Process:

Both recommend hard-coating technologies (e.g., ion-beam assisted deposition) for enhanced film durability.

Considerations:

- In vibration/thermal fluctuation environments, choose Ge substrates for superior thermal stability over Si.

- For gas sensing, multi-layer film designs (e.g., Fabry-Perot structures) can further narrow bandwidth to <10nm for higher resolution.

By following these configurations, 10600nm filters achieve high reliability and precision in laser protection and gas sensing, addressing safety risks and signal interference in practical applications.

Need Customization?