コレクション: 赤外線 (IR) ロングパス フィルター
赤外線 (IR) ロングパス フィルターは、特定の波長以上の光を選択的に透過し、より短い波長をブロックするように設計された重要な光学部品です。これらのフィルターは、科学研究から産業用画像処理まで、さまざまな用途で重要な役割を果たします。
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Dimension
For IR filters, we usually supply in larger format. (Dia100mm to Dia150mm).
Price is also significantly higher than bandpass filter in VIS range. -
Substrates
Silicon (Si)
Silicon is a popular substrate material for IR longpass filters due to its high transmission in the infrared range. It is often used in applications such as FTIR spectroscopy and thermal imaging
Germanium (Ge)
Germanium is another widely used substrate material for IR longpass filters. It offers excellent transmission properties in the infrared spectrum and is durable, making it suitable for various optical applications
Sapphire
Sapphire can also be used as a substrate for IR filters, particularly for applications requiring high durability and resistance to harsh environments. However, it is less common for longpass filters compared to silicon and germanium
Thermal Imaging and Remote Sensing
IR longpass filters are essential in thermal imaging applications to block visible light and shorter wavelength infrared radiation, allowing only thermal radiation with longer wavelengths to pass through. This is critical for capturing high-quality thermal images in applications such as building inspections, electrical inspections, and predictive maintenance.
FTIR Spectroscopy
These filters are ideal for Fourier Transform Infrared (FTIR) spectroscopy, where they help isolate broad regions of the infrared spectrum. They provide high transmission of desired energy and deep rejection of unwanted energy, making them efficient for precise spectroscopic measurements.