KG1

KG1

Virtually colorless shortpass filter with high transmission in the visible and high absorption in the IR ranges (heat protection filter).

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Spectral values guaranteed
τi (365nm) ≥0.89
τi (500nm) ≥0.92
τi (600nm) ≥0.88
τi (700nm) ≤0.68
τi (800nm) ≤0.33
τi (900nm) ≤0.1
τi (1060nm) ≤0.02
τi (2200nm) ≤0.06
Download Data sheet
Glass type
 Article L
 W
 T
 Weight

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

SCHOTT
KG1 - KG1
Thickness
2.0
Reflection factor
0.9200
λ [nm]
200 < 10⁻³
210 < 10⁻³
220 < 10⁻³
230 < 10⁻³
240 < 10⁻³
250 < 10⁻³
260 < 10⁻³
270 0.002
280 0.017
290 0.073
300 0.210
310 0.419
320 0.622
330 0.769
340 0.850
350 0.904
360 0.934
370 0.946
380 0.949
390 0.943
400 0.933
410 0.925
420 0.921
430 0.922
440 0.928
450 0.931
460 0.927
470 0.931
480 0.936
490 0.941
λ [nm]
500 0.943
510 0.940
520 0.936
530 0.936
540 0.940
550 0.944
560 0.946
570 0.944
580 0.939
590 0.930
600 0.920
610 0.906
620 0.889
630 0.869
640 0.848
650 0.823
660 0.797
670 0.769
680 0.738
690 0.702
700 0.664
710 0.628
720 0.592
730 0.553
740 0.517
750 0.477
760 0.439
770 0.401
780 0.366
790 0.329
λ [nm]
800 0.294
810 0.265
820 0.235
830 0.208
840 0.182
850 0.158
860 0.138
870 0.121
880 0.105
890 0.091
900 0.080
910 0.069
920 0.060
930 0.052
940 0.045
950 0.040
960 0.035
970 0.032
980 0.028
990 0.025
1,000 0.022
1,010 0.020
1,020 0.018
1,030 0.017
1,040 0.015
1,050 0.014
1,060 0.013
1,070 0.012
1,080 0.011
1,090 0.011
λ [nm]
1,100 0.010
1,110 0.009
1,120 0.009
1,130 0.009
1,140 0.008
1,150 0.008
1,160 0.008
1,170 0.008
1,180 0.008
1,190 0.007
1,200 0.007
1,250 0.007
1,300 0.008
1,350 0.008
1,400 0.010
1,450 0.012
1,500 0.015
1,550 0.019
1,600 0.025
1,650 0.031
1,700 0.037
1,750 0.042
1,800 0.046
1,850 0.046
1,900 0.045
1,950 0.043
2,000 0.041
2,050 0.038
2,100 0.036
2,150 0.034
λ [nm]
2,200 0.034
2,250 0.035
2,300 0.038
2,350 0.043
2,400 0.049
2,450 0.055
2,500 0.062
2,550 0.067
2,600 0.071
2,650 0.073
2,700 0.072
2,750 0.037
2,800 0.002
2,850 < 10⁻³
2,900 < 10⁻³
2,950 < 10⁻³
3,000 < 10⁻³
3,050 < 10⁻³
3,100 < 10⁻³
3,150 < 10⁻³
3,200 < 10⁻³
3,250 < 10⁻³
3,300 < 10⁻³
3,350 < 10⁻³
3,400 < 10⁻³
3,450 < 10⁻³
3,500 < 10⁻³
3,550 < 10⁻³
3,600 < 10⁻³
3,650 < 10⁻³
λ [nm]
3,700 < 10⁻³
3,750 < 10⁻³
3,800 < 10⁻³
3,850 < 10⁻³
3,900 < 10⁻³
3,950 < 10⁻³
4,000 < 10⁻³
4,050 < 10⁻³
4,100 < 10⁻³
4,150 < 10⁻³
4,200 < 10⁻³
4,250 < 10⁻³
4,300 < 10⁻³
4,350 < 10⁻³
4,400 < 10⁻³
4,450 < 10⁻³
4,500 < 10⁻³
4,550 < 10⁻³
4,600 < 10⁻³
4,650 < 10⁻³
4,700 < 10⁻³
4,750 < 10⁻³
4,800 < 10⁻³
4,850 < 10⁻³
4,900 < 10⁻³
4,950 < 10⁻³
5,000 < 10⁻³
5,050 < 10⁻³
5,100 < 10⁻³
5,150 < 10⁻³
Reflection factor
Pd 0.920
Reference thickness
d [mm] 2
Spectral values guaranteed
τi (365nm) ≥0.89
τi (500nm) ≥0.92
τi (600nm) ≥0.88
τi (700nm) ≤0.68
τi (800nm) ≤0.33
τi (900nm) ≤0.1
τi (1060nm) ≤0.02
τi (2200nm) ≤0.06
Refractive Indices n
nF (486.1 nm) = 1.516
nh (404.7 nm) = 1.524
ng (435.8 nm) = 1.520
ns (852.1 nm) = 1.504
ne (546.1 nm) = 1.513
nd (587.6 nm) = 1.511

Colorimetric evaluation

Illuminant A(Planck T = 2347K)
d [mm] 1 2 3
x 0.444 0.441 0.438
y 0.409 0.411 0.413
Y 88 85 82
λd [nm] 505 505 505
Pe 0.01 0.01 0.02
Illuminant Planck T = 3200 K
d [mm] 1 2 3
x 0.420 0.417 0.415
y 0.401 0.402 0.404
Y 88 85 82
λd [nm] 503 504 504
Pe 0.01 0.01 0.02
Illuminant D65 (TC = 6504 K)
d [mm] 1 2 3
x 0.311 0.309 0.307
y 0.330 0.331 0.332
Y 89 86 83
λd [nm] 497 497 498
Pe 0.01 0.01 0.02
Density
p [g/cm3] 2.521
Bubble content
Bubble class 3
Transformation temperature
Tg [°C] 599
Temperature coefficient
Tk [nm/°C]
Chemical Resistance
FR class 0
SR class 2.0
AR class 3.0
Thermal expansion
α-30°C/+70°C [10-6/K] 5.3
α20°C/300°C [10-6/K] 6.1
α20°C/200°C [10-6/K]
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