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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 1 and 30 with one decimal place are allowed.

SCHOTT
BG42 - BG42
Thickness
1.0
Reflection factor
0.9135
Internal Transmittance (Table)
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 0.035
330 0.168
340 0.328
350 0.451
360 0.533
370 0.593
380 0.642
390 0.683
400 0.720
410 0.753
420 0.783
430 0.810
440 0.834
450 0.854
460 0.874
470 0.890
480 0.904
490 0.915
λ [nm]
500 0.923
510 0.928
520 0.926
530 0.918
540 0.900
550 0.869
560 0.824
570 0.762
580 0.686
590 0.599
600 0.505
610 0.410
620 0.321
630 0.242
640 0.175
650 0.123
660 0.083
670 0.054
680 0.034
690 0.021
700 0.012
710 0.007
720 0.004
730 0.002
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 < 10⁻³
1,150 < 10⁻³
1,160 0.001
1,170 0.001
1,180 0.002
1,190 0.002
1,200 0.002
1,250 0.006
1,300 0.012
1,350 0.026
1,400 0.050
1,450 0.083
1,500 0.130
1,550 0.190
1,600 0.260
1,650 0.331
1,700 0.410
1,750 0.478
1,800 0.548
1,850 0.606
1,900 0.658
1,950 0.705
2,000 0.747
2,050 0.777
2,100 0.805
2,150 0.828
λ [nm]
2,200 0.844
2,250 0.856
2,300 0.860
2,350 0.861
2,400 0.860
2,450 0.852
2,500 0.828
2,550 0.785
2,600 0.760
2,650 0.740
2,700 0.711
2,750 0.578
2,800 0.210
2,850 0.076
2,900 0.040
2,950 0.029
3,000 0.023
3,050 0.019
3,100 0.015
3,150 0.013
3,200 0.011
3,250 0.009
3,300 0.009
3,350 0.008
3,400 0.008
3,450 0.008
3,500 0.009
3,550 0.010
3,600 0.012
3,650 0.013
λ [nm]
3,700 0.014
3,750 0.014
3,800 0.012
3,850 0.010
3,900 0.008
3,950 0.005
4,000 0.003
4,050 0.002
4,100 0.002
4,150 0.001
4,200 < 10⁻³
4,250 < 10⁻³
4,300 < 10⁻³
4,350 0.001
4,400 0.002
4,450 0.002
4,500 0.002
4,550 0.002
4,600 0.002
4,650 0.002
4,700 0.002
4,750 0.002
4,800 0.001
4,850 0.001
4,900 0.001
4,950 0.001
5,000 0.001
5,050 0.001
5,100 0.001
5,150 < 10⁻³
Optical values
Reflection factor
Pd 0.914
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
nh (404.7 nm) = 1.550
nd (587.6 nm) = 1.540
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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