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BP-850nm Bandpass Filter

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Description

BP-850nm Bandpass Filter
WDQ OPTICS specializes in the production of 850nm special filter for security monitoring, with excellent quality, which is a product satisfactory to our customers! Our professional band-pass filter has the characteristics of wide-band pass, multi-bandpass, wide cut-off band, and good film thickness. We define the products with the central wavelength peak bandwidth greater than 20nm as a band-pass filter and adopt multi-layer hard film coating technology to supplement the luminous flux and specific band coexistence requirements expected by customers in the middle of the product use process, It can strictly control the starting and ending wavelength range of transmitted light, and the products are produced according to the index needs of customers.

Specification for BP-850nm Bandpass Filter

Center wavelength:	850nm+/-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

Application fields of bandpass filter:
CMOS chip color camera
CCD chip color camera
Security camera photoresist black-and-white switching light barrier
Security monitor (CCTV) camera
Videophone
Visual doorbell
web camera
Electronic toy camera
Spectral characteristics of filter: bandpass filter, cut-off filter, spectroscopic filter, neutral density filter and reflection filter;

Bandpass filter
The filters adjacent to the cut-off region on both sides of the transmission band of the transmittance wavelength curve are called band-pass filters. Bandpass filters can be roughly divided into broadband filters and narrowband filters. There is no definite boundary between these two types of filters.

Optical characteristics of bandpass 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 all dielectric band-pass filters, 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.

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