Infrared Longpass Filter Φ25mm, Transmission Wavelength: 9.6-14um, Blocking Band: 400-8000nm, United Optical Technology Co., Ltd (CAT#: STEM-OP-4327-YJL)

Infrared Longpass Filter Φ25mm, Transmission Wavelength: 9.6-14um, Blocking Band: 400-8000nm, model 208704, is manufactured by United Optical Technology Co., Ltd.
Mid- and far-infrared filters can transmit light with a specific absorption spectrum of a substance while blocking other unnecessary interfering light, so they are widely used in environmental monitoring, safety detection, FLIR, etc. For example: detection of carbon dioxide (CO₂), methane (CH₄), carbon monoxide (CO), ammonia (NH₃), moisture (H₂O), ethanol (CH₃CH₂OH), sulfur dioxide (SO₂), nitrous oxide (N₂O) and other substances.

Base Material: Germanium GE
Diameter(mm): 25
Thickness(mm): 1
Design Wavelength1(T-1%): 8.2±0.1μm
Design Wavelength2(T=90%): 9.6±0.1μm
Design Wavelength2(T=90%): 9.6±0.1μm
Transmitted Band: Tavg≥85%9.6-14um &Tavg≥90@9.6~12um
Blocking Wavelength: Tmax <1%;Tavg <0.1%@400-8000nm
Surface Quality: 80/50
Diameter Tolerance: +0/-0.2mm
Effective Clear Aperture: 0.9
Thickness Tolerance: ±0.2mm
Blocking Depth: Tmax <1%；Tavg <0.1%

Mid- and far-infrared filters can transmit light with a specific absorption spectrum of a substance while blocking other unnecessary interfering light

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