Magnescale BL50H Linear Laserscale

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High‑Resolution Linear Encoder for High‑Speed Motion Control

The BL50H is a high‑performance linear Laserscale designed for applications requiring both ultra‑high resolution and high‑speed motion control.

Using advanced interferometric measurement technology, it delivers picometre‑level resolution while maintaining stable, high‑speed operation—making it ideal for precision stages, motion systems, and metrology applications.

Key features

Ultra‑high resolution measurement – Achieves resolution down to 6.1 pm for ultra‑fine positioning
High‑speed performance – Supports speeds up to 3 m/s (5 m/s with special configuration)
Excellent motion control capability – Designed specifically for high-speed stage control and precision positioning systems
Outstanding signal quality – Low noise and high signal integrity improve measurement reliability
Wide installation tolerance – Angular tolerance of ±30 minutes simplifies integration

Block diagram of a two-path signal chain: scale to interpolator to USB serial 1 Vp-p A/B phase, with BL50H labels.

How it works

The BL50H uses a diffraction grating interferometric principle with a reflective scale design.

Signal pitch of 400 nm enables high-quality measurement signals
Interpolation via systems such as the BD700 enhances resolution down to the picometre range
Non-contact measurement ensures stable, repeatable performance

This combination enables:

High-speed position feedback
Ultra‑precise control
Minimal signal distortion

Typical applications

High-speed precision stages
Semiconductor manufacturing and inspection
Ultra‑precision machining systems
Tilt tables and advanced motion platforms
Metrology and measurement systems

Why Choose the BL50H

Designed for high-speed, high-resolution motion control
Bridges the gap between ultra precision (BS78) and production speed systems (BL57)
Offers flexibility with multi-axis (1D/2D) configurations
Delivers stable, high‑quality measurement in demanding environments