Optical incremental encoder
Renishaw ATOM
Miniature incremental optical encoder with filtering optics, aimed at space-constrained axes. Available with cable or flexible printed circuit readheads and a range of interpolation interfaces.
Key specifications
| Outer diameter | 17–108 mm |
|---|---|
| Ingress protection | IP40 |
| Linear speed (max) | 20 m/s |
| Resolution (finest) | 1 nm |
| Accuracy | RTLF20/RKLF20 ±5 µm/m; RTLF40/RKLF40 ±15 µm/m; RCLC glass ±3 µm; disc ±19.7 to ±3.1 arc sec system |
| Interface | RS422 digital, 1 Vpp analogue |
Summarised in our own words from Renishaw plc's published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1 · Source 2 · Source 3
Notes on this data
Readhead 20.5 x 12.7 x 8.35 mm (FPC 7.3 mm high). IP40 cable readhead, IP20 FPC readhead. Operating 0 to +70 °C. 40 µm readhead 20 m/s, 20 µm readhead 10 m/s. Rotary up to 29,300 rpm. od_mm = RCDM disc OD.
Specify Motion is not affiliated with Renishaw plc. Renishaw and ATOM are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Typical applications
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Other optical incremental encoder series
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