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BG42

A NIR cutoff filter with a high steepness of NIR cutoff.

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BG42
Spectral values guaranteed
τi (350nm) ≥ 0,4
τi (405nm) ≥ 0,65
τi (514nm) ≥ 0,88
τi (633nm) ≤ 0,27
τi (694nm) ≤ 0,03
τi (1060nm) ≤ 0,002
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Download Data sheet BG42
Article Details
SCHOTT
Article
Glass type
L
W
T
Weight
 
Technical Details
Internal Transmittance (Chart)

Only values between 0.1 and 30 with one decimal place are allowed.

SCHOTT
BG42 - BG42
Thickness
1.0
Reflection factor
0.9153
Internal Transmittance (Table)
λ [nm]
200
210
220
230
240
250
260
270
280
290 < 10⁻³
300 < 10⁻³
310 0.001
320 0.044
330 0.193
340 0.354
350 0.472
360 0.551
370 0.608
380 0.655
390 0.695
400 0.731
410 0.763
420 0.791
430 0.816
440 0.838
450 0.859
460 0.877
470 0.892
480 0.905
490 0.916
λ [nm]
500 0.923
510 0.928
520 0.927
530 0.919
540 0.900
550 0.872
560 0.828
570 0.769
580 0.695
590 0.610
600 0.518
610 0.429
620 0.340
630 0.260
640 0.191
650 0.137
660 0.094
670 0.062
680 0.040
690 0.025
700 0.015
710 0.008
720 0.005
730 0.003
740 0.001
750 < 10⁻³
760 < 10⁻³
770 < 10⁻³
780 < 10⁻³
790 < 10⁻³
λ [nm]
800 < 10⁻³
810 < 10⁻³
820 < 10⁻³
830 < 10⁻³
840 < 10⁻³
850 < 10⁻³
860 < 10⁻³
870 < 10⁻³
880 < 10⁻³
890 < 10⁻³
900 < 10⁻³
910 < 10⁻³
920 < 10⁻³
930 < 10⁻³
940 < 10⁻³
950 < 10⁻³
960 < 10⁻³
970 < 10⁻³
980 < 10⁻³
990 < 10⁻³
1,000 < 10⁻³
1,010 < 10⁻³
1,020 < 10⁻³
1,030 < 10⁻³
1,040 < 10⁻³
1,050 < 10⁻³
1,060 < 10⁻³
1,070 < 10⁻³
1,080 < 10⁻³
1,090 < 10⁻³
λ [nm]
1,100 < 10⁻³
1,110 < 10⁻³
1,120 < 10⁻³
1,130 < 10⁻³
1,140 0.001
1,150 0.001
1,160 0.002
1,170 0.002
1,180 0.002
1,190 0.003
1,200 0.003
1,250 0.007
1,300 0.015
1,350 0.032
1,400 0.058
1,450 0.094
1,500 0.144
1,550 0.207
1,600 0.278
1,650 0.350
1,700 0.429
1,750 0.496
1,800 0.565
1,850 0.621
1,900 0.672
1,950 0.717
2,000 0.758
2,050 0.787
2,100 0.814
2,150 0.836
λ [nm]
2,200 0.851
2,250 0.862
2,300 0.867
2,350 0.868
2,400 0.866
2,450 0.859
2,500 0.836
2,550 0.795
2,600 0.771
2,650 0.751
2,700 0.723
2,750 0.594
2,800 0.227
2,850 0.086
2,900 0.047
2,950 0.035
3,000 0.028
3,050 0.023
3,100 0.019
3,150 0.016
3,200 0.014
3,250 0.012
3,300 0.011
3,350 0.010
3,400 0.010
3,450 0.011
3,500 0.011
3,550 0.013
3,600 0.014
3,650 0.016
λ [nm]
3,700 0.018
3,750 0.017
3,800 0.015
3,850 0.013
3,900 0.010
3,950 0.007
4,000 0.004
4,050 0.003
4,100 0.002
4,150 0.001
4,200 0.001
4,250 0.001
4,300 0.001
4,350 0.002
4,400 0.002
4,450 0.002
4,500 0.003
4,550 0.003
4,600 0.003
4,650 0.003
4,700 0.003
4,750 0.002
4,800 0.002
4,850 0.002
4,900 0.002
4,950 0.002
5,000 0.002
5,050 0.002
5,100 0.002
5,150 0.001
Optical values
Reflection factor
Pd 0.915
Reference thickness
d [mm] 1
Spectral values guaranteed
τi (350nm) ≥ 0,4
τi (405nm) ≥ 0,65
τi (514nm) ≥ 0,88
τi (633nm) ≤ 0,27
τi (694nm) ≤ 0,03
τi (1060nm) ≤ 0,002
Refractive Indices n
nF (486.1 nm) = 1.538
nh (404.7 nm) = 1.548
ng (435.8 nm) = 1.543
ns (852.1 nm) = 1.526
ne (546.1 nm) = 1.535
nd (587.6 nm) = 1.533
Colorimetric evaluation
Illuminant A(Planck T = 2347K)
d [mm] 1 2 3
x 0.359 0.305 0.270
y 0.439 0.456 0.466
Y 61 47 38
λd [nm] 501 501 501
Pe 0.20 0.32 0.40
Illuminant Planck T = 3200 K
d [mm] 1 2 3
x 0.338 0.288 0.256
y 0.424 0.437 0.445
Y 63 48 39
λd [nm] 499 499 499
Pe 0.21 0.33 0.41
Illuminant D65 (TC = 6504 K)
d [mm] 1 2 3
x 0.254 0.222 0.203
y 0.332 0.334 0.337
Y 68 55 46
λd [nm] 492 492 492
Pe 0.21 0.33 0.39
Physical values
Density
p [g/cm3] 2.69
Bubble content
Bubble class 2
Transformation temperature
Tg [°C] 475
Temperature coefficient
Tk [nm/°C]
Chemical Resistance
FR class 0
SR class 2.0
AR class 2.0
Thermal expansion
α-30°C/+70°C [10-6/K] 7.3
α20°C/300°C [10-6/K] 8.7
α20°C/200°C [10-6/K]
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