Infrared Broadband Filter IWBP8075-9400 - High Efficiency by China Suppliers and Factory for Optimal Light Transmission

Definition: An infrared broadband filter is a specialized optical device designed to allow infrared light to pass through a specific wavelength range while efficiently blocking out other wavelengths. This high-performance filter provides exceptional transmission capabilities across the infrared spectrum from 0.9 micrometers to 12 micrometers. The core of its effectiveness lies in the advanced multilayer thin film structure integrated within the filter. Each film layer is carefully engineered with unique refractive indices and thicknesses that are precisely calculated. As light interacts with these layers, different wavelengths experience varying levels of reflection, absorption, and transmission due to their distinct speeds and directional changes. This intricate optical design ensures that the infrared broadband filter proficiently isolates the desired infrared light. Sourced from reputable suppliers in China, our infrared filters are produced in a state-of-the-art factory, ensuring the highest quality and performance for your optical applications.

Product Details

Product Technical Parameters

Substrate: Ge

HT Area: 8075–9400 nm

Tp: ≥ 90%

Blocking: 200–16000 nm

Frequently Asked Questions

This bandpass filter uses Germanium (Ge) as the substrate material. Germanium is widely chosen for mid- to long-wave infrared optical applications due to its excellent infrared transmission and high refractive index, making it ideal for precision optical filter designs in the 8–14 µm spectral range.
The high-transmission (HT) area of this filter spans from 8075 nm to 9400 nm. Within this range, the filter achieves a transmittance of ≥90%, ensuring highly efficient passage of target infrared wavelengths for scientific, industrial, or thermal imaging applications.
Tp ≥ 90% refers to the peak transmittance within the designated high-transmission band (8075–9400 nm). This means at least 90% of the incident light within this wavelength range passes through the filter, resulting in minimal optical signal loss and high measurement or imaging accuracy.
The filter provides effective blocking across a broad spectral range of 200 nm to 16000 nm, except within the defined HT window. This wide blocking range ensures strong out-of-band rejection, eliminating stray light and spectral noise that could interfere with infrared detection systems.
This filter is commonly used in applications such as thermal imaging, gas detection (e.g., CO₂, ozone), LWIR spectroscopy, environmental monitoring, industrial process control, and medical diagnostics. The 8–9.4 µm band is particularly relevant for detecting specific molecular absorption features and thermal radiation from objects near ambient temperature.
Germanium substrates are generally suitable for moderate operating temperatures. However, it is important to note that Ge's infrared transmission decreases noticeably at elevated temperatures (above ~100°C). For high-temperature environments, users should consult technical specifications and consider appropriate mounting or cooling solutions to maintain optimal optical performance and filter longevity.