Infrared Dual-Channel Filter (BP+BP)

Product Introduction:

MULTI IR Dual-Channel Filter (BP+BP) provides core advantages including high accuracy of dual center wavelengths, high and flat transmittance within the passband, 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.

Spectrogram:

BP3070/3960nm SPECIFIC PARAMETERS

Size	Φ0.1-300mm
Substrate Material	Silicon
Center Wavelength 1	3070nm	Center Wavelength 2	3960nm
Half Power Bandwidth 1	60nm	Half Power Bandwidth 2	80nm
Peak Transmittance	≥80%
Cutoff Region Outside Passband	400-11000nm
Average Transmittance (Tavg)	<1%

THE ABOVE PARAMETERS CAN BE CUSTOMIZED

stock items

Introduction

related products

Product Name	CWL1(nm)	HPB (nm)	CWL2(nm)	HPB (nm)	Tp (%）	Size (mm)	Sub Material	Blocking	Tavg	Spectrogram
BP2000+BP3200	2000	325	3200	175	≥70	Φ0.1~300	Quartz	1000~5000
BP3070+BP3960	3070	60	3960	80	≥80	Φ0.1~300	Si	400~11000	<1
BP3070+BP3980	3070	60	3980	80	≥70	Φ0.1~300	Si	400~11000	<1
BP3100+BP4010	3100	90	4010	130	≥75	Φ0.1~300	Si	400~11000
BP3140+BP4050	3140	90	4050	130	≥65	Φ0.1~300	Si	400~11000

The above list shows our current stock items.

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MULTI IR IR Dual-channel Filter (BP+BP) is a high-end customized optical product developed specifically for multi-band infrared detection needs. Its core design is to integrate two independent bandpass filter channels (Bandpass+Bandpass), which can accurately select two different wavelengths of infrared light simultaneously, realizing synchronous capture and separation of signals from two target bands without the need for additional filter component switching, significantly improving detection efficiency and system integration.

This product adopts advanced multi-cavity interference coating technology and high-precision optical processing technology, selecting high-quality dielectric materials and optical substrates (such as germanium, silicon, infrared quartz, zinc sulfide, zinc selenide, gemstone, etc.). Each channel has the characteristics of high peak transmittance (up to 90% or more), narrow bandwidth, and high cutoff depth (above OD5), with high isolation between channels, which can effectively avoid mutual interference between signals of the two bands. As a high-end category of custom optical filters, it is widely used in fields such as multi-component gas detection, biomedical multi-label imaging, environmental multi-parameter monitoring, and industrial process control. In multi-component gas detection, it can simultaneously match the characteristic absorption bands of two different gases, realizing synchronous and accurate detection of mixed gases such as carbon monoxide and methane, carbon dioxide and propane; in biomedical imaging, it can simultaneously capture infrared signals of two different targets in biological tissues, improving the information content and diagnostic efficiency of imaging; in industrial process control, it can synchronously monitor signal changes in two key infrared bands to ensure the stability of the production process and product quality. MULTI IR IR Dual-channel Filter (BP+BP) supports full-parameter customization. Customers can flexibly select the wavelength range, bandwidth, and center wavelength accuracy of the two channels according to actual application needs. At the same time, the product size (1-300mm), shape (such as square, circular, lens, aspherical lens, irregular shape, hexagon, ellipse, sector, etc.), installation method, etc. can be customized to be compatible with various infrared sensors, detectors, spectrometers and other equipment. It can meet the stringent requirements of multi-band synchronous detection in scientific research, industry, medical care and other fields, and provide a highly integrated, efficient and stable filtering solution for complex infrared detection systems.