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NG1

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

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NG1
Spectral values guaranteed
τi (546nm) <0.0001
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Download Data sheet NG1
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
NG1 - NG1
Thickness
1.0
Reflection factor
0.9179
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 < 10⁻³
380 < 10⁻³
390 < 10⁻³
400 < 10⁻³
410 < 10⁻³
420 < 10⁻³
430 < 10⁻³
440 < 10⁻³
450 < 10⁻³
460 < 10⁻³
470 < 10⁻³
480 < 10⁻³
490 < 10⁻³
λ [nm]
500 < 10⁻³
510 < 10⁻³
520 < 10⁻³
530 < 10⁻³
540 < 10⁻³
550 < 10⁻³
560 < 10⁻³
570 < 10⁻³
580 < 10⁻³
590 < 10⁻³
600 < 10⁻³
610 < 10⁻³
620 < 10⁻³
630 < 10⁻³
640 < 10⁻³
650 < 10⁻³
660 < 10⁻³
670 < 10⁻³
680 < 10⁻³
690 < 10⁻³
700 < 10⁻³
710 < 10⁻³
720 < 10⁻³
730 < 10⁻³
740 < 10⁻³
750 0.001
760 0.001
770 0.002
780 0.002
790 0.002
λ [nm]
800 0.003
810 0.003
820 0.003
830 0.004
840 0.004
850 0.004
860 0.005
870 0.005
880 0.005
890 0.005
900 0.006
910 0.006
920 0.006
930 0.006
940 0.006
950 0.007
960 0.007
970 0.008
980 0.008
990 0.008
1,000 0.009
1,010 0.009
1,020 0.010
1,030 0.010
1,040 0.011
1,050 0.011
1,060 0.012
1,070 0.012
1,080 0.013
1,090 0.014
λ [nm]
1,100 0.014
1,110 0.016
1,120 0.016
1,130 0.017
1,140 0.018
1,150 0.020
1,160 0.021
1,170 0.022
1,180 0.023
1,190 0.024
1,200 0.026
1,250 0.035
1,300 0.048
1,350 0.062
1,400 0.078
1,450 0.092
1,500 0.103
1,550 0.111
1,600 0.115
1,650 0.114
1,700 0.114
1,750 0.114
1,800 0.116
1,850 0.120
1,900 0.126
1,950 0.135
2,000 0.146
2,050 0.159
2,100 0.172
2,150 0.188
λ [nm]
2,200 0.204
2,250 0.219
2,300 0.238
2,350 0.256
2,400 0.272
2,450 0.285
2,500 0.303
2,550 0.319
2,600 0.331
2,650 0.335
2,700 0.327
2,750 0.170
2,800 0.089
2,850 0.082
2,900 0.092
2,950 0.104
3,000 0.117
3,050 0.131
3,100 0.147
3,150 0.168
3,200 0.186
3,250 0.204
3,300 0.213
3,350 0.204
3,400 0.166
3,450 0.138
3,500 0.094
3,550 0.062
3,600 0.040
3,650 0.033
λ [nm]
3,700 0.036
3,750 0.048
3,800 0.066
3,850 0.077
3,900 0.076
3,950 0.067
4,000 0.056
4,050 0.051
4,100 0.053
4,150 0.056
4,200 0.057
4,250 0.055
4,300 0.048
4,350 0.035
4,400 0.026
4,450 0.019
4,500 0.013
4,550 0.008
4,600 0.005
4,650 0.003
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 0.918
Reference thickness
d [mm] 1
Spectral values guaranteed
τi (546nm) <0.0001
Refractive Indices n
nF (486.1 nm) = 1.527
nh (404.7 nm) = 1.544
ng (435.8 nm) = 1.536
ns (852.1 nm) = 1.515
ne (546.1 nm) = 1.526
nd (587.6 nm) = 1.522
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] 2.4764
Bubble content
Bubble class 2
Transformation temperature
Tg [°C] 461
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] 6.45
α20°C/300°C [10-6/K] 7.04
α20°C/200°C [10-6/K]
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