| 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 | 
| Download PDF | Schott NG1 Neutral Density Filter.pdf  | 
          
| Price | EMAIL US sales@lookpolymers.com | 
| Physical Properties | Metric | English | Comments | 
|---|---|---|---|
| Density | 2.49 g/cc | 0.0900 lb/in³ | 
| Thermal Properties | Metric | English | Comments | 
|---|---|---|---|
| CTE, linear |           6.60           µm/m-°C           @Temperature -30.0 - 70.0 °C  | 
                  3.67           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 | 466 °C | 871 °F | 
| Optical Properties | Metric | English | Comments | 
|---|---|---|---|
| Refractive Index |           1.52                     @Wavelength 587.6 nm  | 
                  1.52                     @Wavelength 587.6 nm  | 
        He | 
| IR Transmittance |           31 %                     @Wavelength 2800 nm  | 
                  31 %                     @Wavelength 2800 nm  | 
        Internal transmittance of 34% at 2800 nm. | 
| UV Transmittance |           <= 0.0020 %                     @Wavelength 200 - 390 nm  | 
                  <= 0.0020 %                     @Wavelength 200 - 390 nm  | 
        Internal transmittance of 0.001% from 200-390 nm. | 
|           <= 0.090 %                     @Wavelength 200 - 390 nm  | 
                  <= 0.090 %                     @Wavelength 200 - 390 nm  | 
        Internal transmittance of 0.001% from 200-390 nm. | |
| Reflection Coefficient, Visible (0-1) | 0.92 | 0.92 | 
| Chemical Properties | Metric | English | Comments | 
|---|---|---|---|
| Acid Class, SR | 2.2 | 2.2 | |
| Alkali Class, AR | 1 | 1 | |
| Stain Resistance Class, FR | 1 | 1 |