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KG3

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

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KG3
Spectral values guaranteed
τi (365nm) ≥0.86
τi (500nm) ≥0.88
τi (600nm) ≥0.83
τi (700nm) ≤0.55
τi (800nm) ≤0.14
τi (900nm) ≤0.03
τi (1060nm) ≤0.001
τi (2200nm) ≤0.01
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Download Data sheet KG3
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
KG3 - KG3
Thickness
2.0
Reflection factor
0.9200
Internal Transmittance (Table)
λ [nm]
200
210
220
230
240
250
260 < 10⁻³
270 0.002
280 0.021
290 0.087
300 0.229
310 0.426
320 0.618
330 0.763
340 0.845
350 0.895
360 0.934
370 0.946
380 0.951
390 0.938
400 0.922
410 0.908
420 0.899
430 0.904
440 0.911
450 0.916
460 0.911
470 0.917
480 0.925
490 0.929
λ [nm]
500 0.928
510 0.926
520 0.919
530 0.916
540 0.920
550 0.930
560 0.930
570 0.927
580 0.919
590 0.906
600 0.890
610 0.864
620 0.838
630 0.805
640 0.770
650 0.730
660 0.689
670 0.645
680 0.599
690 0.550
700 0.498
710 0.448
720 0.399
730 0.354
740 0.308
750 0.265
760 0.226
770 0.190
780 0.158
790 0.130
λ [nm]
800 0.107
810 0.085
820 0.069
830 0.055
840 0.043
850 0.034
860 0.027
870 0.021
880 0.016
890 0.012
900 0.009
910 0.007
920 0.006
930 0.004
940 0.003
950 0.003
960 0.002
970 0.002
980 0.001
990 0.001
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 < 10⁻³
1,500 < 10⁻³
1,550 < 10⁻³
1,600 0.001
1,650 0.002
1,700 0.003
1,750 0.003
1,800 0.004
1,850 0.004
1,900 0.004
1,950 0.003
2,000 0.003
2,050 0.003
2,100 0.003
2,150 0.003
λ [nm]
2,200 0.003
2,250 0.003
2,300 0.004
2,350 0.004
2,400 0.006
2,450 0.007
2,500 0.009
2,550 0.012
2,600 0.014
2,650 0.017
2,700 0.019
2,750 0.014
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 0.001
3,650 0.002
λ [nm]
3,700 0.002
3,750 0.002
3,800 0.001
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
Optical values
Reflection factor
Pd 0.920
Reference thickness
d [mm] 2
Spectral values guaranteed
τi (365nm) ≥0.86
τi (500nm) ≥0.88
τi (600nm) ≥0.83
τi (700nm) ≤0.55
τi (800nm) ≤0.14
τi (900nm) ≤0.03
τi (1060nm) ≤0.001
τi (2200nm) ≤0.01
Refractive Indices n
nF (486.1 nm) = 1.522
nh (404.7 nm) = 1.529
ng (435.8 nm) = 1.526
ns (852.1 nm) = 1.510
ne (546.1 nm) = 1.518
nd (587.6 nm) = 1.516
Colorimetric evaluation
Illuminant A(Planck T = 2347K)
d [mm] 1 2 3
x 0.442 0.437 0.432
y 0.410 0.413 0.416
Y 86 81 77
λd [nm] 504 505 505
Pe 0.01 0.02 0.04
Illuminant Planck T = 3200 K
d [mm] 1 2 3
x 0.418 0.413 0.409
y 0.401 0.404 0.406
Y 87 82 77
λd [nm] 503 503 503
Pe 0.01 0.02 0.04
Illuminant D65 (TC = 6504 K)
d [mm] 1 2 3
x 0.309 0.306 0.303
y 0.330 0.332 0.333
Y 87 82 78
λd [nm] 496 496 496
Pe 0.01 0.02 0.03
Physical values
Density
p [g/cm3] 2.52
Bubble content
Bubble class 3
Transformation temperature
Tg [°C] 581
Temperature coefficient
Tk [nm/°C]
Chemical Resistance
FR class 0
SR class 2.0
AR class 4.0
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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