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BG64

BG64

A NIR cutoff filter with high humidity resistance.

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*product image is exemplary.

Spectral values guaranteed
τi (405nm) ≥0.99
τi (514nm) ≥0.99
τi (633nm) ≥0.72
τi (694nm) ≤0.55
τi (1060nm) ≤0.45

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

SCHOTT
BG64 - BG64
Thickness
1.0
Reflection factor
0.9160
λ [nm]
200
210
220
230
240
250
260
270
280
290 < 10⁻³
300 0.003
310 0.072
320 0.314
330 0.610
340 0.812
350 0.913
360 0.962
370 0.982
380 0.990
390 0.993
400 0.995
410 0.996
420 0.996
430 0.997
440 0.997
450 0.997
460 0.998
470 0.998
480 0.998
490 0.998
λ [nm]
500 0.997
510 0.996
520 0.994
530 0.990
540 0.985
550 0.977
560 0.966
570 0.951
580 0.932
590 0.909
600 0.882
610 0.850
620 0.814
630 0.775
640 0.733
650 0.689
660 0.645
670 0.601
680 0.562
690 0.521
700 0.482
710 0.447
720 0.414
730 0.385
740 0.359
750 0.337
760 0.317
770 0.301
780 0.288
790 0.276
λ [nm]
800 0.268
810 0.261
820 0.256
830 0.254
840 0.251
850 0.252
860 0.252
870 0.254
880 0.259
890 0.260
900 0.266
910 0.272
920 0.279
930 0.285
940 0.294
950 0.301
960 0.310
970 0.319
980 0.329
990 0.338
1,000 0.348
1,010 0.357
1,020 0.368
1,030 0.379
1,040 0.390
1,050 0.400
1,060 0.411
1,070 0.422
1,080 0.433
1,090 0.445
λ [nm]
1,100 0.455
1,110 0.467
1,120 0.479
1,130 0.490
1,140 0.502
1,150 0.514
1,160 0.525
1,170 0.537
1,180 0.548
1,190 0.560
1,200 0.572
1,250 0.629
1,300 0.684
1,350 0.731
1,400 0.775
1,450 0.814
1,500 0.846
1,550 0.873
1,600 0.896
1,650 0.912
1,700 0.925
1,750 0.936
1,800 0.943
1,850 0.950
1,900 0.953
1,950 0.956
2,000 0.957
2,050 0.958
2,100 0.959
2,150 0.959
λ [nm]
2,200 0.955
2,250 0.951
2,300 0.948
2,350 0.947
2,400 0.945
2,450 0.942
2,500 0.935
2,550 0.938
2,600 0.930
2,650 0.921
2,700 0.908
2,750 0.885
2,800 0.802
2,850 0.666
2,900 0.554
2,950 0.473
3,000 0.411
3,050 0.356
3,100 0.307
3,150 0.263
3,200 0.227
3,250 0.197
3,300 0.174
3,350 0.156
3,400 0.144
3,450 0.137
3,500 0.134
3,550 0.136
3,600 0.143
3,650 0.154
λ [nm]
3,700 0.171
3,750 0.187
3,800 0.195
3,850 0.185
3,900 0.161
3,950 0.134
4,000 0.099
4,050 0.059
4,100 0.030
4,150 0.015
4,200 0.008
4,250 0.005
4,300 0.005
4,350 0.006
4,400 0.006
4,450 0.005
4,500 0.004
4,550 0.003
4,600 0.004
4,650 0.005
4,700 0.008
4,750 0.015
4,800 0.023
4,850 0.031
4,900 0.040
4,950 0.051
5,000 0.065
5,050 0.076
5,100 0.084
5,150 0.086
Reflection factor
Pd 0.916
Reference thickness
d [mm] 1
Spectral values guaranteed
τi (405nm) ≥0.99
τi (514nm) ≥0.99
τi (633nm) ≥0.72
τi (694nm) ≤0.55
τi (1060nm) ≤0.45
Refractive Indices n
nF (486.1 nm) = 1.535
nh (404.7 nm) = 1.543
ng (435.8 nm) = 1.539
ns (852.1 nm) = 1.523
ne (546.1 nm) = 1.532
nd (587.6 nm) = 1.530

Colorimetric evaluation

Illuminant A(Planck T = 2347K)
d [mm] 1 2 3
x 0.427 0.408 0.391
y 0.414 0.419 0.423
Y 84 78 73
λd [nm] 500 500 500
Pe 0.05 0.09 0.13
Illuminant Planck T = 3200 K
d [mm] 1 2 3
x 0.403 0.385 0.368
y 0.403 0.407 0.410
Y 85 79 74
λd [nm] 498 498 498
Pe 0.05 0.09 0.13
Illuminant D65 (TC = 6504 K)
d [mm] 1 2 3
x 0.297 0.284 0.272
y 0.327 0.325 0.323
Y 87 82 79
λd [nm] 490 490 490
Pe 0.06 0.11 0.15
Density
p [g/cm3] 2.7782
Bubble content
Bubble class
Transformation temperature
Tg [°C] 417
Temperature coefficient
Tk [nm/°C]
Chemical Resistance
FR class 1.0
SR class 52.3
AR class 3.3
Thermal expansion
α-30°C/+70°C [10-6/K] 11.98
α20°C/300°C [10-6/K] 13.82
α20°C/200°C [10-6/K]