BG25

BG25

A UV blue bandpass filter that selectively transmits certain wavelength ranges (pass band).

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*product image is exemplary.

Spectral values guaranteed
τi (334nm) ≤0.8
τi (405nm) ≥0.93
τi (488nm) ≤0.39
τi (725nm) ≤0.36

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

SCHOTT
BG25 - BG25
Thickness
1.0
Reflection factor
0.9207
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 0.014
310 0.144
320 0.408
330 0.655
340 0.805
350 0.887
360 0.928
370 0.948
380 0.960
390 0.965
400 0.959
410 0.944
420 0.926
430 0.897
440 0.861
450 0.809
460 0.740
470 0.620
480 0.457
490 0.291
λ [nm]
500 0.183
510 0.097
520 0.045
530 0.017
540 0.010
550 0.015
560 0.025
570 0.018
580 0.005
590 0.001
600 < 10⁻³
610 0.001
620 0.001
630 < 10⁻³
640 < 10⁻³
650 < 10⁻³
660 0.002
670 0.008
680 0.038
690 0.118
700 0.219
710 0.286
720 0.314
730 0.320
740 0.319
750 0.315
760 0.311
770 0.308
780 0.306
790 0.304
λ [nm]
800 0.304
810 0.304
820 0.306
830 0.309
840 0.312
850 0.316
860 0.320
870 0.325
880 0.332
890 0.337
900 0.344
910 0.352
920 0.360
930 0.368
940 0.376
950 0.385
960 0.393
970 0.402
980 0.411
990 0.419
1,000 0.427
1,010 0.434
1,020 0.440
1,030 0.444
1,040 0.448
1,050 0.450
1,060 0.451
1,070 0.450
1,080 0.447
1,090 0.442
λ [nm]
1,100 0.435
1,110 0.426
1,120 0.416
1,130 0.407
1,140 0.392
1,150 0.376
1,160 0.360
1,170 0.345
1,180 0.328
1,190 0.311
1,200 0.294
1,250 0.232
1,300 0.220
1,350 0.250
1,400 0.275
1,450 0.246
1,500 0.230
1,550 0.242
1,600 0.277
1,650 0.298
1,700 0.296
1,750 0.295
1,800 0.313
1,850 0.369
1,900 0.440
1,950 0.515
2,000 0.580
2,050 0.632
2,100 0.670
2,150 0.712
λ [nm]
2,200 0.742
2,250 0.774
2,300 0.800
2,350 0.820
2,400 0.830
2,450 0.836
2,500 0.840
2,550 0.836
2,600 0.832
2,650 0.828
2,700 0.810
2,750 0.725
2,800 0.660
2,850 0.648
2,900 0.647
2,950 0.644
3,000 0.630
3,050 0.608
3,100 0.590
3,150 0.562
3,200 0.530
3,250 0.509
3,300 0.484
3,350 0.464
3,400 0.445
3,450 0.433
3,500 0.423
3,550 0.420
3,600 0.420
3,650 0.423
λ [nm]
3,700 0.426
3,750 0.432
3,800 0.442
3,850 0.452
3,900 0.464
3,950 0.472
4,000 0.477
4,050 0.470
4,100 0.450
4,150 0.430
4,200 0.400
4,250 0.376
4,300 0.340
4,350 0.301
4,400 0.250
4,450 0.205
4,500 0.150
4,550 0.115
4,600 0.078
4,650 0.055
4,700 0.040
4,750 0.033
4,800 0.030
4,850 0.029
4,900 0.026
4,950 0.020
5,000 0.011
5,050 0.005
5,100 0.002
5,150 < 10⁻³
Reflection factor
Pd 0.921
Reference thickness
d [mm] 1
Spectral values guaranteed
τi (334nm) ≤0.8
τi (405nm) ≥0.93
τi (488nm) ≤0.39
τi (725nm) ≤0.36
Refractive Indices n
nh (404.7 nm) = 1.530
nd (587.6 nm) = 1.510

Colorimetric evaluation

Illuminant A(Planck T = 2347K)
d [mm] 1 2 3
x 0.155 0.151 0.155
y 0.093 0.035 0.024
Y 3 1 0
λd [nm] 470 459 454
Pe 0.90 0.98 0.99
Illuminant Planck T = 3200 K
d [mm] 1 2 3
x 0.153 0.152 0.155
y 0.083 0.033 0.023
Y 3 1 0
λd [nm] 469 458 453
Pe 0.91 0.98 0.99
Illuminant D65 (TC = 6504 K)
d [mm] 1 2 3
x 0.150 0.153 0.157
y 0.055 0.027 0.021
Y 5 2 1
λd [nm] 463 455 451
Pe 0.93 0.98 0.99
Density
p [g/cm3] 2.56
Bubble content
Bubble class
Transformation temperature
Tg [°C] 487
Temperature coefficient
Tk [nm/°C]
Chemical Resistance
FR class 0
SR class 1.0
AR class 1.0
Thermal expansion
α-30°C/+70°C [10-6/K] 8.7
α20°C/300°C [10-6/K] 10.1
α20°C/200°C [10-6/K]