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Schott NG4 Neutral Density Filter

Category Ceramic , Glass , Filter , Optical
Manufacturer Schott Glas Mainz
Trade Name
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
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Material Notes:
Ionically colored glass. Data provided by the manufacturer, Schott Glas Mainz..Similar glasses include NG3, NG1, NG5, NG9, NG10, NG11, NG 12
Physical Properties Metric English Comments
Density 2.43 g/cc
0.0878 lb/in³
Thermal Properties Metric English Comments
CTE, linear 6.70 µm/m-°C

@Temperature -30.0 - 70.0 °C
3.72 µin/in-°F

@Temperature -22.0 - 158 °F
7.20 µm/m-°C

@Temperature 20.0 - 300 °C
4.00 µin/in-°F

@Temperature 68.0 - 572 °F
Transformation Temperature, Tg 483 °C
901 °F
Optical Properties Metric English Comments
Refractive Index 1.51

@Wavelength 587.6 nm
1.51

@Wavelength 587.6 nm
He
Transmission, Visible 36 %

@Wavelength 700 nm
36 %

@Wavelength 700 nm
Internal transmittance of 39% at 700 nm.
IR Transmittance 60 %

@Wavelength 2600 nm
60 %

@Wavelength 2600 nm
Internal transmittance of 65% at 2600 nm.
UV Transmittance <= 0.60 %

@Wavelength 200 - 340 nm
<= 0.60 %

@Wavelength 200 - 340 nm
21 %

@Wavelength 390 nm
21 %

@Wavelength 390 nm
Internal transmittance of 23% at 390 nm
Reflection Coefficient, Visible (0-1) 0.92
0.92
Chemical Properties Metric English Comments
Acid Class, SR 3.2
3.2
Alkali Class, AR 2
2
Stain Resistance Class, FR 1
1
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