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NG9

Neutral filters exhibit almost constant attenuation inside the visible spectrum. They appear grey.

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NG9
Spectral values guaranteed
τi (405nm) =0.025± 0,01
τi (546nm) =0.04± 0,02
τi (694nm) =0.08± 0,02
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Download Data sheet NG9
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
NG9 - NG9
Thickness
1.0
Reflection factor
0.9210
Internal Transmittance (Table)
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 < 10⁻³
310 < 10⁻³
320 < 10⁻³
330 < 10⁻³
340 < 10⁻³
350 < 10⁻³
360 < 10⁻³
370 0.003
380 0.005
390 0.015
400 0.023
410 0.028
420 0.031
430 0.034
440 0.036
450 0.039
460 0.043
470 0.044
480 0.042
490 0.041
λ [nm]
500 0.040
510 0.039
520 0.039
530 0.040
540 0.041
550 0.042
560 0.041
570 0.040
580 0.039
590 0.039
600 0.041
610 0.043
620 0.045
630 0.047
640 0.049
650 0.052
660 0.055
670 0.062
680 0.070
690 0.081
700 0.091
710 0.100
720 0.107
730 0.113
740 0.119
750 0.123
760 0.127
770 0.130
780 0.132
790 0.134
λ [nm]
800 0.136
810 0.137
820 0.138
830 0.138
840 0.138
850 0.137
860 0.135
870 0.133
880 0.133
890 0.132
900 0.132
910 0.131
920 0.129
930 0.128
940 0.128
950 0.127
960 0.125
970 0.123
980 0.123
990 0.123
1,000 0.123
1,010 0.123
1,020 0.123
1,030 0.122
1,040 0.121
1,050 0.121
1,060 0.121
1,070 0.122
1,080 0.123
1,090 0.124
λ [nm]
1,100 0.125
1,110 0.127
1,120 0.130
1,130 0.132
1,140 0.134
1,150 0.136
1,160 0.139
1,170 0.141
1,180 0.144
1,190 0.147
1,200 0.150
1,250 0.169
1,300 0.198
1,350 0.227
1,400 0.254
1,450 0.281
1,500 0.306
1,550 0.322
1,600 0.327
1,650 0.329
1,700 0.330
1,750 0.330
1,800 0.332
1,850 0.337
1,900 0.347
1,950 0.358
2,000 0.370
2,050 0.385
2,100 0.400
2,150 0.414
λ [nm]
2,200 0.430
2,250 0.444
2,300 0.460
2,350 0.473
2,400 0.486
2,450 0.498
2,500 0.512
2,550 0.526
2,600 0.534
2,650 0.535
2,700 0.500
2,750 0.271
2,800 0.150
2,850 0.140
2,900 0.151
2,950 0.170
3,000 0.190
3,050 0.211
3,100 0.235
3,150 0.258
3,200 0.280
3,250 0.304
3,300 0.315
3,350 0.292
3,400 0.250
3,450 0.190
3,500 0.130
3,550 0.088
3,600 0.060
3,650 0.051
λ [nm]
3,700 0.060
3,750 0.081
3,800 0.106
3,850 0.123
3,900 0.118
3,950 0.099
4,000 0.080
4,050 0.078
4,100 0.080
4,150 0.086
4,200 0.086
4,250 0.084
4,300 0.065
4,350 0.050
4,400 0.037
4,450 0.026
4,500 0.016
4,550 0.010
4,600 0.006
4,650 0.004
4,700 0.002
4,750 0.001
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 0.921
Reference thickness
d [mm] 1
Spectral values guaranteed
τi (405nm) =0.025± 0,01
τi (546nm) =0.04± 0,02
τi (694nm) =0.08± 0,02
Refractive Indices n
nF (486.1 nm) = 1.515
nh (404.7 nm) = 1.525
ng (435.8 nm) = 1.520
ns (852.1 nm) = 1.501
ne (546.1 nm) = 1.511
nd (587.6 nm) = 1.509
Colorimetric evaluation
Illuminant A(Planck T = 2347K)
d [mm] 1 2 3
x
y
Y
λd [nm]
Pe
Illuminant Planck T = 3200 K
d [mm] 1 2 3
x
y
Y
λd [nm]
Pe
Illuminant D65 (TC = 6504 K)
d [mm] 1 2 3
x
y
Y
λd [nm]
Pe
Physical values
Density
p [g/cm3] 2.4401
Bubble content
Bubble class 2
Transformation temperature
Tg [°C] 469
Temperature coefficient
Tk [nm/°C]
Chemical Resistance
FR class 1
SR class 3.2
AR class 2.0
Thermal expansion
α-30°C/+70°C [10-6/K] 6.46
α20°C/300°C [10-6/K] 7.01
α20°C/200°C [10-6/K]
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