Changchun Realpoo Photoelectric Co.,Ltd.

Optical Filter
Precision Spectral Control for Laser, Imaging & Sensor Systems
Filter Types: Bandpass / Longpass / Shortpass / ND / IR / UV / Custom
Customization: Wavelength • Bandwidth • OD • Size • Coating • Substrate

What Is an Optical Filter?
An optical filter selectively transmits or blocks specific wavelength ranges, enabling accurate spectral control in optical systems.
Optical filters are essential for:
Improving signal-to-noise ratio
Eliminating stray or unwanted light
Protecting sensors and detectors
Ensuring measurement accuracy

Substrate & Coating Options
Substrate Materials
Optical Glass (BK7 etc.) – visible applications
Fused Silica – UV/NIR, laser-grade durability
IR Materials (Ge / ZnSe / ZnS) – infrared systems

Coating Options
Hard dielectric coating – durable & stable
High-OD blocking layers
Angle-optimized coating designs
Laser-grade coatings for high power systems