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ILP10000-Infrared long-pass filter
Infrared long-pass filter
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ILP10000-Infrared long-pass filter

An infrared long-pass filter is essentially an element that permits the transmission of infrared light with wavelengths beyond a certain point while obstructing or deflecting light with shorter wavelengths like visible light. Its functionality primarily hinges on the phenomena of interference and the absorption properties of materials. Usually crafted from engineered dielectric or metal films with precise refractive indices and thicknesses the filter operates by causing multiple reflections and interferences, among these film layers when light interacts with it. When light with wavelengths than a certain limit hits the filter surface it goes through intricate reflection and interference mechanisms causing most of the light to bounce off or get absorbed while only a small portion manages to pass through it. On the other hand, when infrared light, with wavelengths longer than the specified threshold, encounters the filter it allows them to pass without hindrance.

    Application Fields

    Infrared long-pass filters are incredibly versatile. Find applications across various domains such as infrared imaging systems where they are essential in filtering out visible and near-infrared light to improve the sharpness and differentiation in infrared images. They also come into play in spectral analysis to selectively allow certain wavelengths of infrared light through for material composition examination and structural analysis purposes. Additionally, in thermometers, these filters are instrumental in eliminating any disruptions, from visible or near-infrared light ensuring precise measurement of object temperatures.

    Security surveillance systems improve the night vision features of cameras to enhance monitoring capabilities during low light conditions In remote sensing and Earth observation applications infrared cameras capture and process infrared radiation data from the earth's surface In biomedical uses they play a key role in infrared spectral imaging methods In laser safety applications they safeguard individuals, against particular laser wavelengths They are widely employed in military settings including infrared guidance systems and reconnaissance equipment that utilize infrared technology.

    Product Technical Parameters

    Substrate:GE    HT area:10000-18000nm    Tp:≥75%    Blocking :200-9550nm    Tavg:≤1%

    LP10000nm(3)