Ideal for thermal imaging, IR spectroscopy, and laser systems operating in the 3.7–4.8 µm band, our ZnSe optics deliver reliable, low-loss performance for critical industrial and scientific applications.
This transmittance curve verifies the high performance of our ZnSe 3.7–4.8 μm A+A AR coated window, optimized for mid-wave infrared (MWIR) applications:
High Transmittance: Average 99.1964% across the full 3.7–4.8 μm band, with peak transmittance exceeding 99.3%.
Optimized Response: Two high-transmission peaks at ~3.85 μm and ~4.6 μm, tailored for common MWIR use cases.
Key Clarification: The small dip near 4.26 μm is caused by atmospheric CO₂ absorption during testing (not a coating flaw).
Superior to Uncoated ZnSe: The AR coating eliminates most surface reflection, outperforming uncoated ZnSe (only ~69% transmittance in this range).
