BG61

BG61

A NIR cutoff filter with high humidity resistance.

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*product image is exemplary.

Spectral values guaranteed
τi (405nm) ≥0.84
τi (514nm) ≥0.93
τi (633nm) ≥0.18
τi (694nm) ≤0.03
τi (1060nm) ≤0.008
Glass type
Article L
W
T
Weight

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

SCHOTT
BG61 - BG61
Thickness
1.0
Reflection factor
0.9150
λ [nm]
200
210
220
230
240
250
260
270
280
290
300
310 < 10⁻³
320 < 10⁻³
330 0.036
340 0.211
350 0.461
360 0.650
370 0.759
380 0.820
390 0.854
400 0.876
410 0.893
420 0.906
430 0.917
440 0.927
450 0.935
460 0.942
470 0.948
480 0.952
490 0.956
λ [nm]
500 0.955
510 0.952
520 0.942
530 0.926
540 0.899
550 0.860
560 0.808
570 0.742
580 0.663
590 0.577
600 0.485
610 0.395
620 0.311
630 0.236
640 0.174
650 0.125
660 0.086
670 0.059
680 0.038
690 0.025
700 0.016
710 0.010
720 0.007
730 0.005
740 0.003
750 0.002
760 0.001
770 0.001
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 0.001
980 0.001
990 0.002
1,000 0.002
1,010 0.002
1,020 0.003
1,030 0.003
1,040 0.004
1,050 0.004
1,060 0.005
1,070 0.006
1,080 0.007
1,090 0.008
λ [nm]
1,100 0.009
1,110 0.010
1,120 0.012
1,130 0.014
1,140 0.016
1,150 0.018
1,160 0.021
1,170 0.024
1,180 0.027
1,190 0.030
1,200 0.034
1,250 0.060
1,300 0.098
1,350 0.147
1,400 0.211
1,450 0.280
1,500 0.353
1,550 0.429
1,600 0.499
1,650 0.566
1,700 0.625
1,750 0.677
1,800 0.721
1,850 0.759
1,900 0.790
1,950 0.817
2,000 0.838
2,050 0.856
2,100 0.872
2,150 0.883
λ [nm]
2,200 0.890
2,250 0.895
2,300 0.899
2,350 0.904
2,400 0.908
2,450 0.909
2,500 0.906
2,550 0.906
2,600 0.900
2,650 0.895
2,700 0.885
2,750 0.862
2,800 0.774
2,850 0.639
2,900 0.529
2,950 0.450
3,000 0.389
3,050 0.337
3,100 0.290
3,150 0.249
3,200 0.214
3,250 0.187
3,300 0.166
3,350 0.150
3,400 0.139
3,450 0.133
3,500 0.131
3,550 0.136
3,600 0.143
3,650 0.155
λ [nm]
3,700 0.172
3,750 0.189
3,800 0.197
3,850 0.189
3,900 0.167
3,950 0.140
4,000 0.105
4,050 0.064
4,100 0.034
4,150 0.017
4,200 0.010
4,250 0.007
4,300 0.007
4,350 0.008
4,400 0.008
4,450 0.006
4,500 0.005
4,550 0.005
4,600 0.005
4,650 0.007
4,700 0.011
4,750 0.017
4,800 0.026
4,850 0.035
4,900 0.045
4,950 0.058
5,000 0.073
5,050 0.086
5,100 0.096
5,150 0.099
Reflection factor
Pd 0.915
Reference thickness
d [mm] 1
Spectral values guaranteed
τi (405nm) ≥0.84
τi (514nm) ≥0.93
τi (633nm) ≥0.18
τi (694nm) ≤0.03
τi (1060nm) ≤0.008
Refractive Indices n
nF (486.1 nm) = 1.541
nh (404.7 nm) = 1.549
ng (435.8 nm) = 1.545
ns (852.1 nm) = 1.528
ne (546.1 nm) = 1.537
nd (587.6 nm) = 1.535

Colorimetric evaluation

Illuminant A(Planck T = 2347K)
d [mm] 1 2 3
x 0.349 0.289 0.250
y 0.432 0.438 0.435
Y 60 46 37
λd [nm] 499 498 497
Pe 0.22 0.37 0.46
Illuminant Planck T = 3200 K
d [mm] 1 2 3
x 0.328 0.272 0.236
y 0.415 0.416 0.410
Y 62 48 39
λd [nm] 497 496 495
Pe 0.23 0.37 0.47
Illuminant D65 (TC = 6504 K)
d [mm] 1 2 3
x 0.245 0.210 0.189
y 0.319 0.307 0.296
Y 68 55 47
λd [nm] 490 489 488
Pe 0.25 0.39 0.48
Density
p [g/cm3] 2.8064
Bubble content
Bubble class
Transformation temperature
Tg [°C] 402
Temperature coefficient
Tk [nm/°C]
Chemical Resistance
FR class 1
SR class 52.3
AR class 3.3
Thermal expansion
α-30°C/+70°C [10-6/K] 11.94
α20°C/300°C [10-6/K] 13.85
α20°C/200°C [10-6/K]