Economical Longpass Filter, Φ12.5mm, Transmission Wavelength: 880~2000nm, Blocking Band: 635~810nm, United Optical Technology Co., Ltd (CAT#: STEM-OP-3699-YJL)

Economical Longpass Filter, Φ12.5mm, Transmission Wavelength: 880~2000nm, Blocking Band: 635~810nm, model 208596, is manufactured by United Optical Technology Co., Ltd.
Long wave pass filters are usually designed for 0° incident angle. Precautions for use: Please wear finger gloves when using, and do not touch the surface directly with your fingers to avoid residual fingerprints affecting the light transmission effect. If the filter surface is dirty, use dust-free lens cleaning paper dipped in alcohol to wipe the lens surface. Do not use cloth or paper with a very rough surface or water to wipe it, otherwise it will damage the surface.

Diameter: Φ12.5mm
Center Wavelength(CWL): 850nm
Transmission Wavelength: 880~2000nm
Blocking Band: 635~810nm
Material: Optical Grade Float Glass (B270)
Transmitted Wavefront Error: λ/4@633nm
Parallelism: ＜30arcsec
Surface Quality: 40/20-60/40
Diameter Tolerance: +0.0/-0.1mm
Thickness: 2mm±0.2mm
Central Wavelength Tolerance: ±2%
Transmission(T): Tavg＞85%
Blocking Depth: OD2
Blocking Slope: ＜3%
Clear Aperture: ＞90%
Angle of Incidence: 0°

The Economical Longpass Filter allows light with a wavelength greater than the set wavelength to pass through and cuts off light with a wavelength smaller than the set wavelength.
The long-wavepass filter has the advantages of wide cut-off bandwidth, deep cut-off depth, high conversion steepness, and high transmittance.

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