IdealPhotonics' CRDS high-reflectivity mirror is an ultra-high reflectivity (≥99.99%) optical lens for cavity ring-down spectroscopy (CRDS) systems. It enhances the photon lifetime within the optical cavity through extremely low-loss reflection, achieving extremely high sensitivity for trace gas detection.Key features include reflectivity (≥99.99%), scattering loss (≤X ppm), surface roughness (≤Y Å), thermal stability (ΔZ ppm/℃), and damage threshold (≥A kW/cm²), ensuring maximum cavity ring-down time (τ) and long-term reliability.