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Dielectric Long Wave Pass Filter D12.5-50mm Bandpass Cut-off Filter 400-1500nm B270 Optical Glass

Product details:
Material: Optical grade float glass (B270)
Transmission wavefront error: wavelength/4 @ 633nm
Parallel difference: less than 30 seconds
Surface finish: 3-4 levels
Size error:+0.0/-0.1mm
Thickness: 2mm+0.2mm
Center wavelength: ± 2%
Transmittance: Tavg>85%
Depth of cut-off band: OD2
Cutoff band steepness:<3%
Effective aperture:>90%
Incident angle: 0 °
Center wavelength: The wavelength position with a transmittance of 50%
Cutoff band steepness: (λ (t80%)- λ (t10%))/ λ (t10%) * 100%

（We are good at customizing various filters, if you need other types of filters, please feel free to contact me.）

Note:
Long wave pass filters are manufactured by coating high-quality optical substrates. It has the advantages of high conversion steepness and high transmittance.  It can be widely used in fluorescence spectroscopy, Raman spectroscopy, spectral grouping applications, and astronomical observation applications.  Due to the use of high-quality optical substrates, this type of filter can also be widely used in imaging optical systems, machine vision system applications, to eliminate interference light outside the available band, greatly improving imaging clarity, as well as the sensitivity of the system.
 
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