Laser Scales
BH20
Laserscale easily achieves measurement and control by ultra high resolution less than 1nm.
Sinusoidal wave of approx.138nm signal period is generated by a hologram scale with high diffraction efficiency and a high resolution detecting head based on grating interference method, strong against disturbance by air pressure or current, plus easy to install (BS series).
Features
Compact, reflective rotary Laserscale featuring high accuracy, high resolution and high response speed. Ideal for high-resolution angle measuring in HDD manufacturing equipment, precision measuring instruments, and aspheric surface processing machines.
Signal wavelength : 250nm
High.speed response : 1,500mm/s (When using analog output), 700mm/s(When using interpolator BD96) 160 min-1 (when using r=41mm scale) 555 min-1(when using r=12mm scale)
Maximum resolution : 4,294,967,296 pulses/rotation(when using r=41mm scale, divisions=4,096) 3.017 x 10-4 sec (when using r=41mm scale) 1.46nrad (when using r=41mm scale)
Available with/without reference point
Thin head with thickness of 12mm
Interpolators with various resolutions and output modes available
Special nonmagnetic and vacuum-compatible models available
Specifications
| # | Specifications | Specifications |
|---|---|---|
| 1 | Model | BH20-RED / BH20-NED |
| 2 | Overall length(rotation) | - |
| 3 | Accuracy(at 20℃) | - |
| 4 | Grating pitch | 1.0μm |
| 5 | Signal pitch | 250nm |
| 6 | Light source | Semiconductor laser Wavelength 790nm Max.output6mW |
| 7 | Detection method | Diffraction grating scanning system |
| 8 | Operating temperature | 10℃～30℃ non condensing |
Gallery
