Miniature incremental optical encoder
February 18, 2016http://www.renishaw.com
Providence, Rhode Island – The ATOM non-contact optical linear and rotary incremental encoder system combines miniaturization with dirt immunity, signal stability, and reliability. With a read head as small as 6.7mm x 12.7mm x 20.5mm, ATOM miniature encoders use filtering optics with auto gain control (AGC) and auto offset control (AOC) for signal stability and dirt immunity. Applications include laser scanning, precision micro stages, semiconductor, medical, DDR motors, microscopy, scientific research, and space-critical motion control, inspection, and metrology.
The ATOM system offers low sub-divisional error (SDE), low jitter, and long-term reliability. ATOM offers analog speeds to 20m/s (29,000rpm on a 17mm disc) and digital resolutions to 1nm when used with Renishaw interpolation electronics. The read head includes a set-up LED to allow quick and easy installation, and an auto-calibration routine to enable faster optimization. Scale options include linear and rotary (angle) scales in stainless steel and glass.
The ATOM readhead is available with either high-flex cable or flexible-printed circuit (FPC) output, in both 20µm and 40µm scale options, with ultra-compact interface electronics in ACi and Ri options. The FPC variant reduces the overall package size and allows integration with ACi. A variety of high-accuracy scales is available, including industry-standard stainless steel tapes, high accuracy linear glass spars, and rotary glass discs from 17mm to 108mm in diameter.
Optional interfaces support interpolation factors to x 20,000. Designers can also use the sinusoidal signal output from the read head for direct connection to analog drives and controllers.