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Band-Pass Filter Glass

band-pass

 

 

 

 

 

 

 

This kind of glass only transmits the light within a narrow wavelength range as shown in figure. Its spectral characteristic is composed of maximum transmissivity (TM) wavelength of the peak (lM), front-cut-off wavelength, behind-cut-off wavelength, and half-peak width.

The wavelength corresponding to the half of the maximum transmissivity are l2 and l1. And the half-peak width is determined by l2 – l1. Front (behind)-cut-off wavelength is corresponding to the wavelength of “zero” transmissivity. But there are a few types which transmissivities of the behind-cut-off wavelengths can’t approach to zero, then they are determined by the transmissivity of the certain wavelength.

Band-Pass Filter Glass is named DTB, and wavelength of the peak is used as its serial number.

Spectrum Characteristic Curve of Band-Pass Filter Glass

Technical Indexes

No.TypeMaximum Transmissivity
(TM/lM nm)
Front Cut-off
(T/l nm)
Behind Cut-off
(T/l nm)
Half-peak Width
l2 – l1 (nm)
Thickness (nm)
1DTB400>45/400+/-20/320+/-50/525+/-5<902
2DTB435>48/435+/-20/340+/-5<2.0/540+/-5<1004
3DTB470>40/470+/-20/340+/-50/600+/-5<1154
4DTB500>48/500+/-20/380+/-50/630+/-5<1004
5DTB530>48/530+/-20/420+/-50/670+/-5<952
6DTB545>48/545+/-20/400+/-50/720+/-5<1004
7DTB560>40/560+/-20/435+/-50/725+/-5<1044
8DTB600>36/600+/-20/470+/-5<1.0/800+/-5<954
9DTB660>44/660+/-20/500+/-5<2.0/800+/-5<1154
10DTB700>28/700+/-2<0.5/570+/-5<2.0/820+/-5<954
11DTB720>50/720+/-20/500+/-5<9.0/900+/-5<1404
12DTB740>25/740+/-20/650+/-5<4.0/900+/-5<854

Please contact our sales engineers for your custom Band-Pass Filter Glass solutions today.

Call us to find out more about our services at +1 732-321-6915 or our design services team info@shanghai-optics.com directly for free initial technical consultation.

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