Your Optical Filter Partner

Protective Windows filtersProtective Windows was wildly used in optical instrument like camera, LED Screen, touch screen, LCD projector, Fingerprint analyzer and monitor because of the feature of dustproof, waterproof and anti-reflection .


The coating process for Protective Windows is easier compare to other optical filters. It can be produced by almost all optical filters manufacture. While our advantage is to produce Waterproof Protective Window.


Our coating technology for Protective Window is dielectric coating, which coat the anti-reflective film and waterproof film on it. It is waterproof, dustproof, and has great surface quality. There is no flow marks when Water drops on the Protective Window. Our products pass the MIL-PRF-13830A, MIL-PRF-13830B,MIL-C-48497A.

Below are the most common spectrum curve for Protective Window.

Transmittance Curve:
Protective Windows Transmittance Curve

Reflectivity Curve:

Reflectivity Curve Protective Windows
The OEM order for protective windows is welcome. For better communication, please provide below information when you send the inquiry. Thank you.

Substrate K9
Size(Tolerance)
2.8*2.8mm-170*170mm
Edge Chamfering
<0.3mm×45°
Surface Flatness λ/2
Parallelism 30”
Surface Quality 60-40
Clear Aperture (%) >90%
Spectrum Range Rave<0.5%,Rmax<1% @420-680nm
Waterproof/Dustproof Single/double side waterproof/dustproof