Visible light high-transmission filter, high transmittance, low reflection, clear imaging optical component.

A visible light high-transmission filter is an optical filtering device that exhibits high transmittance in the visible light spectrum (typically 400–700 nm), widely used in scenarios requiring high luminous flux such as imaging, detection, and lighting. Below is a summary of its core information:

Core Performance

• High Transmittance: Average transmittance in the visible light region exceeds 90%, with some high-quality products reaching over 93% (e.g., quartz substrate).

• Broadband Transmission: Covers 400–700 nm, with some models supporting an extended visible range of 380–780 nm.

• Low Absorption and Reflection: With anti-reflection (AR) coating, single-side reflectance is <0.5%, double-side <1%, effectively reducing ghosting and glare.

• Steep Cutoff: When integrated with infrared cutoff functionality, the cutoff depth at 700 nm can reach OD4 (T <0.01%).

Typical Structure

• Substrate Materials: K9, B270, fused silica (JGS1), etc.; quartz versions offer both ultraviolet extension and high-temperature resistance.

• Coating Design: Multilayer dielectric hard coatings (Ta₂O₅/SiO₂), ion-assisted deposition (IAD), dense film layers, and long lifespan.

• Customizable Dimensions: Common sizes Ø10–80 mm, thickness 0.3–5 mm, with options for custom shaping or silk-screened light-blocking edges.