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KG2

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

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KG2
Spectral values guaranteed
τi (365nm) ≥0.93
τi (500nm) ≥0.94
τi (600nm) ≥0.92
τi (700nm) ≤0.83
τi (800nm) ≤0.55
τi (900nm) ≤0.28
τi (1060nm) ≤0.12
τi (2200nm) ≤0.2
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Download Data sheet KG2
Article Details
SCHOTT
Article
Glass type
L
W
T
Weight
 
Technical Details
Internal Transmittance (Chart)

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

SCHOTT
KG2 - KG2
Thickness
2.0
Reflection factor
0.9200
Internal Transmittance (Table)
λ [nm]
200 < 10⁻³
210 < 10⁻³
220 < 10⁻³
230 < 10⁻³
240 < 10⁻³
250 < 10⁻³
260 0.001
270 0.020
280 0.088
290 0.245
300 0.444
310 0.637
320 0.769
330 0.852
340 0.902
350 0.931
360 0.949
370 0.959
380 0.965
390 0.961
400 0.955
410 0.948
420 0.942
430 0.939
440 0.938
450 0.939
460 0.942
470 0.946
480 0.951
490 0.954
λ [nm]
500 0.957
510 0.956
520 0.954
530 0.952
540 0.953
550 0.955
560 0.954
570 0.952
580 0.949
590 0.944
600 0.938
610 0.931
620 0.923
630 0.913
640 0.902
650 0.889
660 0.875
670 0.859
680 0.841
690 0.820
700 0.798
710 0.774
720 0.750
730 0.725
740 0.699
750 0.671
760 0.643
770 0.613
780 0.584
790 0.553
λ [nm]
800 0.524
810 0.494
820 0.464
830 0.434
840 0.408
850 0.382
860 0.356
870 0.330
880 0.305
890 0.284
900 0.265
910 0.246
920 0.228
930 0.213
940 0.200
950 0.185
960 0.173
970 0.161
980 0.151
990 0.142
1,000 0.133
1,010 0.126
1,020 0.119
1,030 0.113
1,040 0.109
1,050 0.105
1,060 0.101
1,070 0.097
1,080 0.095
1,090 0.093
λ [nm]
1,100 0.091
1,110 0.090
1,120 0.088
1,130 0.087
1,140 0.086
1,150 0.085
1,160 0.084
1,170 0.083
1,180 0.082
1,190 0.081
1,200 0.080
1,250 0.079
1,300 0.081
1,350 0.085
1,400 0.093
1,450 0.103
1,500 0.116
1,550 0.131
1,600 0.147
1,650 0.165
1,700 0.183
1,750 0.195
1,800 0.201
1,850 0.201
1,900 0.197
1,950 0.190
2,000 0.183
2,050 0.178
2,100 0.172
2,150 0.168
λ [nm]
2,200 0.165
2,250 0.167
2,300 0.176
2,350 0.189
2,400 0.200
2,450 0.211
2,500 0.223
2,550 0.231
2,600 0.237
2,650 0.240
2,700 0.233
2,750 0.149
2,800 0.023
2,850 0.007
2,900 0.005
2,950 0.004
3,000 0.003
3,050 0.003
3,100 0.003
3,150 0.003
3,200 0.003
3,250 0.003
3,300 0.004
3,350 0.004
3,400 0.004
3,450 0.005
3,500 0.005
3,550 0.006
3,600 0.007
3,650 0.008
λ [nm]
3,700 0.007
3,750 0.005
3,800 0.003
3,850 0.002
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
Optical values
Reflection factor
Pd 0.920
Reference thickness
d [mm] 2
Spectral values guaranteed
τi (365nm) ≥0.93
τi (500nm) ≥0.94
τi (600nm) ≥0.92
τi (700nm) ≤0.83
τi (800nm) ≤0.55
τi (900nm) ≤0.28
τi (1060nm) ≤0.12
τi (2200nm) ≤0.2
Refractive Indices n
nd (587.6 nm) = 1.510
Colorimetric evaluation
Illuminant A(Planck T = 2347K)
d [mm] 1 2 3
x 0.446 0.444 0.442
y 0.409 0.410 0.411
Y 89 87 84
λd [nm] 506 507 507
Pe 0.00 0.01 0.01
Illuminant Planck T = 3200 K
d [mm] 1 2 3
x 0.422 0.420 0.419
y 0.400 0.401 0.402
Y 89 87 84
λd [nm] 505 505 506
Pe 0.00 0.01 0.01
Illuminant D65 (TC = 6504 K)
d [mm] 1 2 3
x 0.312 0.311 0.310
y 0.330 0.331 0.331
Y 90 87 85
λd [nm] 501 501 501
Pe 0.00 0.01 0.01
Physical values
Density
p [g/cm3] 2.52
Bubble content
Bubble class 3
Transformation temperature
Tg [°C] 605
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] 5.4
α20°C/300°C [10-6/K] 6.3
α20°C/200°C [10-6/K]
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