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BG26

BG26
Spectral values guaranteed
τi (450nm) ≥0.98
τi (633nm) ≤0.79
τi (800nm) ≤0.62
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Technical Details
Internal Transmittance (Chart)

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

SCHOTT
BG26 - BG26
Thickness
1.0
Reflection factor
0.9213
Internal Transmittance (Table)
λ [nm]
200
210
220
230
240
250
260
270
280 < 10⁻³
290 0.005
300 0.079
310 0.314
320 0.595
330 0.785
340 0.888
350 0.940
360 0.964
370 0.977
380 0.982
390 0.986
400 0.989
410 0.990
420 0.991
430 0.992
440 0.992
450 0.993
460 0.993
470 0.993
480 0.991
490 0.989
λ [nm]
500 0.985
510 0.979
520 0.971
530 0.960
540 0.946
550 0.931
560 0.913
570 0.893
580 0.871
590 0.848
600 0.824
610 0.800
620 0.776
630 0.752
640 0.729
650 0.707
660 0.687
670 0.668
680 0.651
690 0.636
700 0.624
710 0.611
720 0.601
730 0.593
740 0.586
750 0.580
760 0.576
770 0.572
780 0.570
790 0.569
λ [nm]
800 0.568
810 0.569
820 0.570
830 0.572
840 0.575
850 0.578
860 0.582
870 0.586
880 0.591
890 0.596
900 0.603
910 0.609
920 0.616
930 0.623
940 0.630
950 0.637
960 0.645
970 0.652
980 0.659
990 0.667
1,000 0.674
1,010 0.681
1,020 0.689
1,030 0.696
1,040 0.703
1,050 0.710
1,060 0.717
1,070 0.724
1,080 0.730
1,090 0.737
λ [nm]
1,100 0.743
1,110 0.750
1,120 0.756
1,130 0.762
1,140 0.768
1,150 0.774
1,160 0.780
1,170 0.785
1,180 0.791
1,190 0.796
1,200 0.801
1,250 0.826
1,300 0.848
1,350 0.867
1,400 0.884
1,450 0.898
1,500 0.910
1,550 0.921
1,600 0.930
1,650 0.938
1,700 0.944
1,750 0.950
1,800 0.954
1,850 0.957
1,900 0.960
1,950 0.962
2,000 0.964
2,050 0.965
2,100 0.967
2,150 0.967
λ [nm]
2,200 0.963
2,250 0.962
2,300 0.962
2,350 0.963
2,400 0.962
2,450 0.958
2,500 0.955
2,550
2,600
2,650
2,700
2,750
2,800
2,850
2,900
2,950
3,000
3,050
3,100
3,150
3,200
3,250
3,300
3,350
3,400
3,450
3,500
3,550
3,600
3,650
λ [nm]
3,700
3,750
3,800
3,850
3,900
3,950
4,000
4,050
4,100
4,150
4,200
4,250
4,300
4,350
4,400
4,450
4,500
4,550
4,600
4,650
4,700
4,750
4,800
4,850
4,900
4,950
5,000
5,050
5,100
5,150
Optical values
Reflection factor
Pd 0.921
Reference thickness
d [mm] 1
Spectral values guaranteed
τi (450nm) ≥0.98
τi (633nm) ≤0.79
τi (800nm) ≤0.62
Refractive Indices n
nF (486.1 nm) = 1.516
nh (404.7 nm) = 1.525
ng (435.8 nm) = 1.521
ns (852.1 nm) = 1.502
ne (546.1 nm) = 1.512
nd (587.6 nm) = 1.510
Colorimetric evaluation
Illuminant A(Planck T = 2347K)
d [mm] 1 2 3
x
y
Y
λd [nm]
Pe
Illuminant Planck T = 3200 K
d [mm] 1 2 3
x
y
Y
λd [nm]
Pe
Illuminant D65 (TC = 6504 K)
d [mm] 1 2 3
x
y
Y
λd [nm]
Pe
Physical values
Density
p [g/cm3]
Bubble content
Bubble class
Transformation temperature
Tg [°C]
Temperature coefficient
Tk [nm/°C]
Chemical Resistance
FR class -
SR class -
AR class -
Thermal expansion
α-30°C/+70°C [10-6/K]
α20°C/300°C [10-6/K]
α20°C/200°C [10-6/K]
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