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NG3

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

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NG3
Spectral values guaranteed
τi (405nm) =0.06± 0,02
τi (546nm) =0.1± 0,02
τi (694nm) =0.17± 0,03
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Download Data sheet NG3
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
NG3 - NG3
Thickness
1.0
Reflection factor
0.9214
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 0.001
360 0.006
370 0.017
380 0.022
390 0.047
400 0.067
410 0.074
420 0.081
430 0.087
440 0.095
450 0.102
460 0.111
470 0.113
480 0.110
490 0.107
λ [nm]
500 0.105
510 0.104
520 0.105
530 0.107
540 0.109
550 0.110
560 0.110
570 0.107
580 0.105
590 0.105
600 0.107
610 0.111
620 0.116
630 0.119
640 0.122
650 0.126
660 0.132
670 0.142
680 0.156
690 0.172
700 0.187
710 0.200
720 0.209
730 0.217
740 0.223
750 0.227
760 0.231
770 0.234
780 0.236
790 0.237
λ [nm]
800 0.238
810 0.237
820 0.237
830 0.236
840 0.235
850 0.234
860 0.231
870 0.230
880 0.227
890 0.223
900 0.221
910 0.220
920 0.218
930 0.215
940 0.213
950 0.211
960 0.209
970 0.207
980 0.205
990 0.204
1,000 0.202
1,010 0.202
1,020 0.201
1,030 0.201
1,040 0.200
1,050 0.201
1,060 0.202
1,070 0.201
1,080 0.202
1,090 0.203
λ [nm]
1,100 0.203
1,110 0.205
1,120 0.208
1,130 0.210
1,140 0.212
1,150 0.215
1,160 0.218
1,170 0.220
1,180 0.223
1,190 0.226
1,200 0.230
1,250 0.253
1,300 0.280
1,350 0.311
1,400 0.340
1,450 0.373
1,500 0.397
1,550 0.415
1,600 0.422
1,650 0.424
1,700 0.423
1,750 0.424
1,800 0.427
1,850 0.432
1,900 0.443
1,950 0.455
2,000 0.467
2,050 0.481
2,100 0.496
2,150 0.509
λ [nm]
2,200 0.522
2,250 0.536
2,300 0.550
2,350 0.562
2,400 0.571
2,450 0.579
2,500 0.584
2,550 0.590
2,600 0.593
2,650 0.596
2,700 0.570
2,750 0.288
2,800 0.160
2,850 0.144
2,900 0.157
2,950 0.178
3,000 0.200
3,050 0.222
3,100 0.250
3,150 0.275
3,200 0.300
3,250 0.324
3,300 0.330
3,350 0.312
3,400 0.260
3,450 0.195
3,500 0.140
3,550 0.085
3,600 0.062
3,650 0.050
λ [nm]
3,700 0.060
3,750 0.085
3,800 0.116
3,850 0.136
3,900 0.130
3,950 0.107
4,000 0.080
4,050 0.080
4,100 0.085
4,150 0.090
4,200 0.090
4,250 0.083
4,300 0.070
4,350 0.052
4,400 0.040
4,450 0.027
4,500 0.017
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) =0.06± 0,02
τi (546nm) =0.1± 0,02
τi (694nm) =0.17± 0,03
Refractive Indices n
nF (486.1 nm) = 1.514
nh (404.7 nm) = 1.523
ng (435.8 nm) = 1.519
ns (852.1 nm) = 1.499
ne (546.1 nm) = 1.509
nd (587.6 nm) = 1.507
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] 2.44
Bubble content
Bubble class 2
Transformation temperature
Tg [°C] 462
Temperature coefficient
Tk [nm/°C]
Chemical Resistance
FR class 1
SR class 2.2
AR class 1.0
Thermal expansion
α-30°C/+70°C [10-6/K] 6.5
α20°C/300°C [10-6/K] 7.3
α20°C/200°C [10-6/K]
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