Collection: LiDAR Filter

In LiDAR (Light Detection and Ranging) systems, optical filters play a crucial role in ensuring accurate and reliable distance measurements. These filters act like gatekeepers, selectively allowing specific wavelengths of light to reach the detector while blocking unwanted ones. This helps improve signal-to-noise ratio, minimize background interference, and optimize lidar performance.

Key Factors:

• Wavelength Selection: The choice of filter wavelength depends on the specific LiDAR system and application. Here are common scenarios:
  • Eye-safe LiDAR (905nm or 1550nm): These wavelengths fall within the eye-safe region, allowing for operation in public spaces without safety concerns.
  • High-performance LiDAR (1064nm or 532nm): These wavelengths offer better range and resolution but might require additional safety precautions due to higher power levels.

• Bandwidth: This defines the range of wavelengths around the chosen central wavelength that the filter transmits. Narrower bandwidth offers higher selectivity, reducing noise and interference, while wider bandwidth provides higher signal transmission.

• Steepness: The rate of transition between the filter's passband and stopband. Steeper transitions offer sharper cuts between desired and unwanted wavelengths, improving signal-to-noise ratio.

• Peak Transmission: Represents the percentage of light at the central wavelength that passes through the filter. Higher peak transmission leads to stronger signals but might require balancing with other features like steepness.

• Material and Construction: Different materials (e.g., glass, polymers) and construction techniques influence the filter's performance, durability, and cost.