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BH20Laserscale
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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)
- High 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
| Reader heads Specifications | ||
|---|---|---|
| Model | BH20-RED | BH20-NED |
| Overall length(直線/rotation) | － | |
| Accuracy(at 20℃) | － | |
| Grating pitch | 1.0μm | |
| Signal pitch | 250nm | |
| Reference point position | Single point | None |
| Reference point detection direction | Single direction | － |
| Light source | Semiconductor laser Wavelength 790ｎｍ Max. output6ｍW | |
| Detection method | Diffraction grating scanning system | |
| Operating temperature | 10℃～30℃ non condensing | |
| Storage temperature | 0℃～50℃ non condensing | |
| Maximum response speed(*1) | 700mm/s(when connected BD96) | |
| Film scale (BE10)Specifications | |||||
|---|---|---|---|---|---|
This product might change without a previous notice for the improvement, confirm the function and the performance with the latest specifications. | |||||
| Detection radius | 12.032mm | 27.073mm | 36.097mm | 41.723mm | |
| External form | Internal diameter | 7.7mm | 19.77mm | 29.00mm | 34mm |
| External diameter | 13.45mm | 28.57mm | 37.60mm | 43.523mm | |
| Scale diameter | 20φmm | 59φmm | 77φmm | 87φmm | |
| Maximum response speed（*1） | 1,190min-1 | 529min-1 | 396min-1 | 343min-1 | |
| Number of output pulse of one rotation | 302,400pulse/rotation | 680,400pulse/rotation | 907,200pulse/rotation | 1,048,576pulse/rotation | |
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