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BG57

BG57.jpeg
Spectral values guaranteed
τi (405nm) ≥0.35
τi (514nm) ≥0.71
τi (633nm) ≤0.02
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Download Data sheet BG57
Technical Details
Internal Transmittance (Chart)

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

SCHOTT
BG57 - BG57
Thickness
1.0
Reflection factor
0.9109
Internal Transmittance (Table)
λ [nm]
200
210
220
230
240
250
260
270
280
290
300
310
320 < 10⁻³
330 < 10⁻³
340 < 10⁻³
350 0.019
360 0.084
370 0.177
380 0.263
390 0.332
400 0.382
410 0.420
420 0.450
430 0.475
440 0.501
450 0.533
460 0.573
470 0.613
480 0.659
490 0.703
λ [nm]
500 0.742
510 0.766
520 0.768
530 0.742
540 0.682
550 0.596
560 0.488
570 0.371
580 0.252
590 0.155
600 0.085
610 0.041
620 0.017
630 0.007
640 0.002
650 < 10⁻³
660 < 10⁻³
670 < 10⁻³
680 < 10⁻³
690 < 10⁻³
700 < 10⁻³
710 < 10⁻³
720 < 10⁻³
730 < 10⁻³
740 < 10⁻³
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 < 10⁻³
1,170 < 10⁻³
1,180 < 10⁻³
1,190 < 10⁻³
1,200 < 10⁻³
1,250 < 10⁻³
1,300 < 10⁻³
1,350 < 10⁻³
1,400 < 10⁻³
1,450 0.002
1,500 0.007
1,550 0.018
1,600 0.038
1,650 0.068
1,700 0.110
1,750 0.163
1,800 0.224
1,850 0.287
1,900 0.351
1,950 0.418
2,000 0.479
2,050 0.535
2,100 0.589
2,150 0.635
λ [nm]
2,200 0.672
2,250 0.705
2,300 0.730
2,350 0.761
2,400 0.779
2,450 0.804
2,500 0.818
2,550 0.825
2,600 0.830
2,650 0.835
2,700 0.834
2,750 0.815
2,800 0.701
2,850 0.544
2,900 0.442
2,950 0.378
3,000 0.332
3,050 0.294
3,100 0.261
3,150 0.232
3,200 0.209
3,250 0.190
3,300 0.177
3,350 0.168
3,400 0.163
3,450 0.163
3,500 0.166
3,550 0.173
3,600 0.183
3,650 0.196
λ [nm]
3,700 0.209
3,750 0.212
3,800 0.197
3,850 0.168
3,900 0.133
3,950 0.097
4,000 0.059
4,050 0.032
4,100 0.018
4,150 0.011
4,200 0.008
4,250 0.007
4,300 0.008
4,350 0.009
4,400 0.010
4,450 0.010
4,500 0.011
4,550 0.012
4,600 0.015
4,650 0.020
4,700 0.028
4,750 0.038
4,800 0.049
4,850 0.060
4,900 0.072
4,950 0.083
5,000 0.092
5,050 0.095
5,100 0.089
5,150 0.076
Optical values
Reflection factor
Pd 0.911
Reference thickness
d [mm] 1
Spectral values guaranteed
τi (405nm) ≥0.35
τi (514nm) ≥0.71
τi (633nm) ≤0.02
Refractive Indices n
nF (486.1 nm) = 1.558
nh (404.7 nm) = 1.569
ng (435.8 nm) = 1.564
ns (852.1 nm) = 1.544
ne (546.1 nm) = 1.553
nd (587.6 nm) = 1.551
Colorimetric evaluation
Illuminant A(Planck T = 2347K)
d [mm] 1 2 3
x 0.265 0.215 0.191
y 0.501 0.557 0.604
Y 32 18 11
λd [nm] 504 507 510
Pe 0.41 0.53 0.59
Illuminant Planck T = 3200 K
d [mm] 1 2 3
x 0.252 0.207 0.186
y 0.481 0.538 0.589
Y 34 19 12
λd [nm] 503 506 509
Pe 0.41 0.52 0.58
Illuminant D65 (TC = 6504 K)
d [mm] 1 2 3
x 0.204 0.178 0.164
y 0.379 0.442 0.507
Y 40 24 15
λd [nm] 497 502 507
Pe 0.37 0.44 0.48
Physical values
Density
p [g/cm3] 2.813
Bubble content
Bubble class
Transformation temperature
Tg [°C] 411
Temperature coefficient
Tk [nm/°C]
Chemical Resistance
FR class
SR class 5.2
AR class 3.0
Thermal expansion
α-30°C/+70°C [10-6/K] 9.74
α20°C/300°C [10-6/K] 11.54
α20°C/200°C [10-6/K]
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