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BP-1653nm Bandpass Filter

BP-1653nm BandPass Filter is a near-infrared band-pass filter, which is widely suitable for high-tech fields such as gas detection filter, unmanned radar, near-infrared detection and so on

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BP-1653nm Bandpass Filter
Bp-1653nm band-pass filter is a near-infrared band-pass filter, which is widely suitable for unmanned radar, near-infrared detection, and other high-tech fields

Compared with coal, natural gas is a relatively environmentally friendly fuel. With the increasing popularity of natural gas in China, the safety of gas pipelines has been paid more and more attention by the competent security inspection department. Therefore, the safety inspection and leakage early warning of natural gas and methane gas is becoming more and more important.

At present, China mainly develops 1653nm filter as a detection scheme for natural gas and methane gas detection, which is mainly based on the strong absorption spectral line characteristics of methane ch molecules in the 1653nm band as a detection means and can also eliminate the interference of other gases to the detection.

At present, the main 1653nm filters for methane gas detection in China include vehicle-mounted methane gas remote sensing detection, unmanned airborne detection, handheld portable, fixed detection point scheme, and so on.

Technical parameters of 1653nm infrared filter:

Center wavelength:	1653+/-2nm
Incident angle:	0°
Half peak bandwidth:	25nm
Peak transmittance:	>90% (according to customer demand)
Product size:	3mm-80mm (customizable)
Cutoff wavelength:	200nm-2000nm (according to customer requirements)
Cut off depth:	>0D3-0D6 UV-NIR
Product material:	Optical grade glass (k9.bk7.b270.d263tjgs1. Color glass, float glass, etc.)
Surface finish:	National standard level III, MIL-STD Standard 60-40

Other optical characteristics of band-pass filter:
-The higher the cutoff OD value, the narrower the pass bandwidth. At the same time, the higher the reflectivity of the cutoff film, the greater the absorption and scattering, and the lower the peak transmittance of the band-pass filter.
-In an all-dielectric band-pass filter, if the transmittance of the film on the two surfaces is not equal, it will also affect the reduction of the passband transmittance of the filter.
-The band-pass filter provided by WDQ options is made of multi-layer hard film by ion-assisted deposition of nanomaterials and high vacuum evaporation. The film has good compactness and high imaging definition. Imported high-quality optical glass has optical characteristics such as high transmission height, good finish, small thickness tolerance, and good flatness.
The vacuum ion sputtering coating process with imported Japanese photochemical coating equipment has the characteristics of high hardness, good spectral uniformity, and strong center wave stability.

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