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SCHOTT BG Glass (glass color will vary by product specification)
SCHOTT Matte Colored Glass Filter Plates are unpolished plates of colored glass that are used as raw material to manufacture SCHOTT Colored Glass Filters. With large standard sizes up to 165 x 165mm, these plates can be cut, ground, and polished to meet application requirements for a wide range of filter sizes. SCHOTT Matte Colored Glass Filter Plates are available in all SCHOTT colored glass types, including shortpass (heat absorbing), longpass, bandpass, and neutral density. To learn more about how our custom optical colored glass filter capabilities can be used for your application, see our capabilities page.
| Edge length and diameter | +/-0.2 mm |
| Thickness | For ≤ 1mm: ± 0.1mm For > 1 – 3mm: ± 0.2mm |
| Surface Quality | 60 – 40 |
| Surface Accuracy | ≤8 Waves |
| Parallelism | ≤3 arcmin |
| Clear Aperture | ≥90% |
| Edges & Bevels | Round parts ≥ ∅5mm: polished edges & protective bevel Square & rectangular parts < 50 x 50mm: polished edges, no bevel |
| Edge Chips | For ≤ ∅80mm: < 0.3mm (5/E0.3), for ≥ ∅81mm < 0.6mm (5/E0.6) |
| Polishing quality | P2 |
| Defects | 5/3 x 0.63 |
| All edges machined | |
| Round filters with chamfer max. 0.5mm, square and rectangular < 50x50mm without chamfer | |
| Edge chips permitted up to 5/E0.3 | |
| General Information SCHOTT Optical Filter Glass: | |||||
| BG | Blue, blue-green, and multiband glasses | ||||
| GG | Nearly colorless to yellow glasses, IR transmitting | ||||
| KG | Virtually colorless glasses with high transmission in the visible and absorption in the IR | ||||
| NG | Neutral density glasses with uniform attenuation in the visible range | ||||
| OG | Orange glasses, IR transmitting | ||||
| RG | Red and black glasses, blocking visible, IR transmitting | ||||
| UG | Black and blue glasses, UV transmitting | ||||
| VG | Green glasses | ||||
| WG | Colorless glasses with different cut-offs in the UV, transmitting in the visible and IR ranges | ||||
| Note: The spectral curves above show the internal transmittance of the individual optical filter glasses | |||||
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IGES:igs
eDrawing:eprt
EO Spec Sheet
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