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BG3

BG3

A UV blue bandpass filter that selectively transmits certain wavelength ranges (pass band).

Find more information in the tabs below or on our website.

Use our Interactive Filter Diagram to compare this filter or download our Filter Calculation Tool.

For customized filter products you can mark an article and use the request-button.

*product image is exemplary.

Spectral values guaranteed
τi (365nm) ≥0.94
τi (633nm) ≤0.00005

Only values between 1 and 30 with one decimal place are allowed.

SCHOTT
BG3 - BG3
Thickness
1.0
Reflection factor
0.9208
λ [nm]
200 < 10⁻³
210 < 10⁻³
220 < 10⁻³
230 < 10⁻³
240 < 10⁻³
250 0.006
260 0.103
270 0.364
280 0.626
290 0.798
300 0.899
310 0.951
320 0.973
330 0.983
340 0.986
350 0.987
360 0.987
370 0.984
380 0.981
390 0.975
400 0.951
410 0.916
420 0.874
430 0.815
440 0.745
450 0.658
460 0.550
470 0.393
480 0.222
490 0.097
λ [nm]
500 0.043
510 0.013
520 0.003
530 < 10⁻³
540 < 10⁻³
550 < 10⁻³
560 0.002
570 0.001
580 < 10⁻³
590 < 10⁻³
600 < 10⁻³
610 < 10⁻³
620 < 10⁻³
630 < 10⁻³
640 < 10⁻³
650 < 10⁻³
660 < 10⁻³
670 < 10⁻³
680 0.010
690 0.100
700 0.359
710 0.655
720 0.846
730 0.938
740 0.976
750 0.986
760 0.988
770 0.989
780 0.990
790 0.990
λ [nm]
800 0.990
810 0.990
820 0.990
830 0.990
840 0.989
850 0.989
860 0.989
870 0.989
880 0.988
890 0.988
900 0.988
910 0.987
920 0.986
930 0.984
940 0.981
950 0.976
960 0.971
970 0.965
980 0.957
990 0.948
1,000 0.937
1,010 0.923
1,020 0.910
1,030 0.891
1,040 0.868
1,050 0.843
1,060 0.813
1,070 0.780
1,080 0.746
1,090 0.706
λ [nm]
1,100 0.667
1,110 0.615
1,120 0.568
1,130 0.525
1,140 0.480
1,150 0.432
1,160 0.388
1,170 0.343
1,180 0.308
1,190 0.273
1,200 0.241
1,250 0.146
1,300 0.120
1,350 0.141
1,400 0.150
1,450 0.118
1,500 0.100
1,550 0.100
1,600 0.124
1,650 0.141
1,700 0.140
1,750 0.133
1,800 0.144
1,850 0.185
1,900 0.250
1,950 0.328
2,000 0.400
2,050 0.462
2,100 0.520
2,150 0.567
λ [nm]
2,200 0.620
2,250 0.657
2,300 0.701
2,350 0.735
2,400 0.754
2,450 0.764
2,500 0.765
2,550 0.761
2,600 0.756
2,650 0.743
2,700 0.724
2,750 0.644
2,800 0.587
2,850 0.576
2,900 0.572
2,950 0.570
3,000 0.562
3,050 0.548
3,100 0.526
3,150 0.507
3,200 0.484
3,250 0.463
3,300 0.444
3,350 0.427
3,400 0.410
3,450 0.398
3,500 0.392
3,550 0.390
3,600 0.392
3,650 0.398
λ [nm]
3,700 0.404
3,750 0.413
3,800 0.423
3,850 0.433
3,900 0.446
3,950 0.456
4,000 0.460
4,050 0.456
4,100 0.440
4,150 0.417
4,200 0.392
4,250 0.367
4,300 0.337
4,350 0.292
4,400 0.250
4,450 0.200
4,500 0.160
4,550 0.113
4,600 0.078
4,650 0.056
4,700 0.042
4,750 0.035
4,800 0.032
4,850 0.031
4,900 0.027
4,950 0.020
5,000 0.011
5,050 0.005
5,100 0.002
5,150 < 10⁻³
Reflection factor
Pd 0.921
Reference thickness
d [mm] 1
Spectral values guaranteed
τi (365nm) ≥0.94
τi (633nm) ≤0.00005
Refractive Indices n
nF (486.1 nm) = 1.516
ng (435.8 nm) = 1.520
ns (852.1 nm) = 1.502
ne (546.1 nm) = 1.512
nd (587.6 nm) = 1.510
n (302.1 nm) = 1.548

Colorimetric evaluation

Illuminant A(Planck T = 2347K)
d [mm] 1 2 3
x 0.160 0.166 0.170
y 0.042 0.024 0.020
Y 1 0 0
λd [nm] 458 447 440
Pe 0.96 0.98 0.98
Illuminant Planck T = 3200 K
d [mm] 1 2 3
x 0.157 0.163 0.167
y 0.038 0.022 0.018
Y 1 0 0
λd [nm] 457 447 442
Pe 0.97 0.98 0.99
Illuminant D65 (TC = 6504 K)
d [mm] 1 2 3
x 0.154 0.160 0.163
y 0.029 0.018 0.014
Y 2 1 0
λd [nm] 455 448 444
Pe 0.98 0.99 1.00
Density
p [g/cm3] 2.56
Bubble content
Bubble class
Transformation temperature
Tg [°C] 478
Temperature coefficient
Tk [nm/°C]
Chemical Resistance
FR class 0
SR class 1.0
AR class 1.0
Thermal expansion
α-30°C/+70°C [10-6/K] 8.8
α20°C/300°C [10-6/K] 10.2
α20°C/200°C [10-6/K]