Encoder Discs
Material
| Substrate material | selected float glass, BK7 optical glass, quartz glass, ceramics, borosilicate, aluminium oxide and others. |
| Thickness of substrate | 0,5 - 8 mm |
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Coating - optical density - reflection - layer thickness |
vacuum deposited chrome 1.5 - 3 (±5%) at 400-900 nm < 63% at 400-900 nm 200÷2000 Å |
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Disc processing |
Laser cutting, grinding |
| Outbreaks on edges | < 0.1 mm |
| Grinded, polished glass | edges linearity 0.015 mm/m |
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Pattern
| Coating | Aluminum, silica, chrome, anti-reflective chrome and others on request |
| Graduation line's width max. tolerance | ±10% |
| Max. graduation accuracy | 2 arc. sec |
| Graduation coaxiality to outside diameter | < 0.1 mm (DIN7184) |
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GLASS PLATES
Glass plates are available in a variety of pattern configurations for variety of applications
| Overall dimensions | up to 8" (203,2 mm) |
| Minimum size of element | 5 μm |
| Pattern size | up to 180x180 mm |
Variations to suit customer requirements
Other glass types, glass thicknesses and shapes of graduations lines can be provided.</
