Infrared Dual-Channel Filter (WBP+LP)

Product Introduction:

MULTI IR WBP+LP (Dual-Channel) Filter offers core advantages including high accuracy of dual center wavelengths, excellent isolation between channels, deep cutoff depth, and high edge transition steepness. It is widely used in gas detection and analysis, smart home multi-parameter sensing, industrial and agricultural production control, medical testing, and other application fields.

WBP1600-2300+LP3600nm SPECIFIC PARAMETERS

Size	Φ0.1-300mm
Substrate Material	Silicon
WBP High Transmittance Region	1700~2200nm	LP High Transmittance Region	4000-6000nm
50% Cut-on	1600nm	50% Wavelength	3600nm
50% Cut-off	2300nm	Average Transmittance (Tavg)	≥90%
Average Transmittance (Tavg)	≥93%
Front Cutoff Region	400~1550nm
Average Transmittance (Tavg)	<1%
Middle Cutoff Region	2350~3550nm
Average Transmittance (Tavg)	<2%

THE ABOVE PARAMETERS CAN BE CUSTOMIZED

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related products

Product Name	50% left	50% right	LP50%	WBP-Blocking(nm)	Tmin	Tavg	LP-Blocking(nm)	Tmin	Tavg	Size（mm）	Sub Material	Previous cut-off area	Tavg	Intermediate cut-off area	Tavg	Spectrogram
WBP1.6~2.3+LP3.6	1600	2300	3600	1700~2200	/	≥93	4000~6000	/	≥90	Φ0.1~300	Si	400~1550	<1	2350~3550	<2
WBP1.75~2.3+LP3.7	1750	2300	3700	1800~2250	/	≥80	3750~5000		≥90	Φ0.1~300	Si	400~1600	<1	2350~3650	<2
WBP1.75~2.3+LP3.9	1750	2300	3900	1800~2250	/	≥80	4100~5500		≥90	Φ0.1~300	Si	400~1600	<1	2400~3650	<2
WBP3-5+LP7500	3000	5000	7500	3250~4750	/	≥85	7750~14000		≥85	Φ0.1~300	Ge	400~7250
WBP10.3~11.3 + LP11500	10600	11450	11650	10750~11300	/	≥80	11800~12400		≥80	Φ0.1~300	Ge
Combined filter WBP+LP	10600	11500	11700	10600~11300	/	≥80	11800~12550		≥80	Φ0.1~300	Ge	7000~14000	<1

The above list shows our current stock items.

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MULTI IR IR Dual-channel Filter (WBP+LP) is an innovatively developed composite optical filter product, integrating two functions: Wide Bandpass (WBP) filtering and Longpass (LP) filtering. Its core advantage is to simultaneously realize the transmission of wide-band infrared light and the precise selection of specific long-wavelength infrared light through a single filter component. The two channels work synergistically, which can not only capture wide-range infrared signals but also focus on target long-wave infrared information, meeting the dual detection needs of "broad-spectrum coverage + precise targeting".

This product adopts a composite film system design and advanced coating technology. The wide-bandpass channel can cover a wide infrared band from hundreds of nanometers to several micrometers, with high transmittance and a flat spectral curve; the longpass channel can customize a specific cutoff wavelength (such as 720nm, 1000nm, etc.) to achieve efficient cutoff of short-wavelength light. The optical parameters of the two channels are matched with each other without obvious signal interference. It is widely used in infrared thermal imaging and spectrum analysis combined systems, environmental monitoring multi-band fusion equipment, security monitoring wide dynamic range imaging, industrial infrared temperature measurement and composition detection integrated equipment and other fields. In environmental monitoring, the wide-band channel can capture various infrared signals in the environment, and the longpass channel selects the characteristic long-wave infrared signals of target pollutants, realizing comprehensive monitoring and precise identification of complex environments; in industrial detection, the wide-band channel is used to obtain the overall infrared thermal imaging information of the equipment, and the longpass channel focuses on the specific infrared band signals of key components, realizing temperature monitoring and composition analysis simultaneously; in security monitoring, it can take into account wide-range infrared imaging and long-wave infrared enhanced identification of specific targets, improving the monitoring effect in complex scenarios. MULTI IR IR Dual-channel Filter (WBP+LP) supports in-depth customization services. Customers can adjust parameters such as the wavelength range of the wide-band channel, the cutoff wavelength of the longpass channel, the transmittance and cutoff depth of the two channels according to their needs. The product size (1-300mm) and shape (such as square, circular, lens, aspherical lens, irregular shape, hexagon, ellipse, sector, etc.) can be adapted to different equipment installation requirements, compatible with various terminal equipment such as infrared cameras, spectrometers, and sensors. It can meet the integrated needs of multi-functional infrared detection in fields such as industry, security, environmental protection, and scientific research, and provide an efficient and compact filtering solution for complex optical systems.