BG7

BG7

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

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Spectral values guaranteed
τi (365nm) ≥0.25
τi (488nm) ≥0.78
τi (633nm) ≤0.08
Glass type
Article L
W
T
Weight

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

SCHOTT
BG7 - BG7
Thickness
1.0
Reflection factor
0.9183
λ [nm]
200 < 10⁻³
210 < 10⁻³
220 < 10⁻³
230 < 10⁻³
240 < 10⁻³
250 < 10⁻³
260 < 10⁻³
270 < 10⁻³
280 < 10⁻³
290 < 10⁻³
300 < 10⁻³
310 < 10⁻³
320 < 10⁻³
330 0.013
340 0.066
350 0.160
360 0.260
370 0.349
380 0.435
390 0.504
400 0.561
410 0.614
420 0.657
430 0.695
440 0.728
450 0.754
460 0.776
470 0.788
480 0.794
490 0.788
λ [nm]
500 0.767
510 0.730
520 0.679
530 0.611
540 0.535
550 0.450
560 0.369
570 0.295
580 0.229
590 0.174
600 0.131
610 0.096
620 0.070
630 0.051
640 0.037
650 0.027
660 0.021
670 0.015
680 0.011
690 0.009
700 0.007
710 0.006
720 0.005
730 0.004
740 0.004
750 0.003
760 0.003
770 0.003
780 0.003
790 0.003
λ [nm]
800 0.003
810 0.003
820 0.003
830 0.003
840 0.003
850 0.003
860 0.003
870 0.004
880 0.004
890 0.004
900 0.005
910 0.005
920 0.006
930 0.007
940 0.008
950 0.009
960 0.010
970 0.011
980 0.012
990 0.014
1,000 0.016
1,010 0.018
1,020 0.020
1,030 0.022
1,040 0.024
1,050 0.026
1,060 0.029
1,070 0.033
1,080 0.036
1,090 0.041
λ [nm]
1,100 0.044
1,110 0.048
1,120 0.052
1,130 0.056
1,140 0.062
1,150 0.067
1,160 0.073
1,170 0.078
1,180 0.084
1,190 0.090
1,200 0.096
1,250 0.132
1,300 0.171
1,350 0.215
1,400 0.263
1,450 0.314
1,500 0.363
1,550 0.412
1,600 0.462
1,650 0.508
1,700 0.550
1,750 0.589
1,800 0.624
1,850 0.656
1,900 0.685
1,950 0.712
2,000 0.737
2,050 0.757
2,100 0.774
2,150 0.789
λ [nm]
2,200 0.802
2,250 0.816
2,300 0.827
2,350 0.839
2,400 0.849
2,450 0.860
2,500 0.870
2,550 0.881
2,600 0.887
2,650 0.887
2,700 0.875
2,750 0.767
2,800 0.691
2,850 0.675
2,900 0.672
2,950 0.670
3,000 0.654
3,050 0.628
3,100 0.602
3,150 0.574
3,200 0.546
3,250 0.517
3,300 0.493
3,350 0.472
3,400 0.451
3,450 0.438
3,500 0.433
3,550 0.432
3,600 0.434
3,650 0.438
λ [nm]
3,700 0.444
3,750 0.453
3,800 0.465
3,850 0.478
3,900 0.490
3,950 0.501
4,000 0.503
4,050 0.495
4,100 0.478
4,150 0.456
4,200 0.430
4,250 0.400
4,300 0.366
4,350 0.326
4,400 0.281
4,450 0.230
4,500 0.177
4,550 0.128
4,600 0.091
4,650 0.064
4,700 0.046
4,750 0.036
4,800 0.031
4,850 0.029
4,900 0.027
4,950 0.020
5,000 0.013
5,050 0.006
5,100 0.003
5,150 0.001
Reflection factor
Pd 0.918
Reference thickness
d [mm] 1
Spectral values guaranteed
τi (365nm) ≥0.25
τi (488nm) ≥0.78
τi (633nm) ≤0.08
Refractive Indices n
nh (404.7 nm) = 1.540
nd (587.6 nm) = 1.520

Colorimetric evaluation

Illuminant A(Planck T = 2347K)
d [mm] 1 2 3
x 0.262 0.179 0.145
y 0.406 0.360 0.317
Y 30 14 8
λd [nm] 495 492 490
Pe 0.44 0.65 0.76
Illuminant Planck T = 3200 K
d [mm] 1 2 3
x 0.246 0.172 0.143
y 0.382 0.333 0.292
Y 31 16 9
λd [nm] 493 490 488
Pe 0.45 0.66 0.76
Illuminant D65 (TC = 6504 K)
d [mm] 1 2 3
x 0.191 0.152 0.138
y 0.272 0.229 0.200
Y 38 21 13
λd [nm] 486 484 482
Pe 0.49 0.68 0.76
Density
p [g/cm3] 2.61
Bubble content
Bubble class
Transformation temperature
Tg [°C] 468
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] 8.5
α20°C/300°C [10-6/K] 9.9
α20°C/200°C [10-6/K]