An encoder scale uses an inclined second surface to direct reflected light away from the photodetector path.
A scanning unit uses direction-selective deflection elements to route light beams toward a jointly illuminated sub-area on the measuring scale.
A retroreflective encoder uses deflecting corner cubes to detect displacement with high resolution.
A self-delayed homodyne optical fiber sensor computes Brillouin frequency shift using phase control and intensity normalization.
Wavefront correctors in the reflector unit compensate for deformations from curved graduations, restoring interference contrast and signal quality.
A transparent carrier element supports a scanning grating and a damping structure to achieve homogeneous light distribution on the detector arrangement.
A polarization-maintaining fiber interferometer uses a birefringence modulator to process high-frequency signals.
An optical encoder protector features an inclined top surface that diverts reflected light away from photoreceiver fibers.
Multi-grating optical readhead separates analyser from scale to eliminate shadows while maintaining high measurement precision.
A self-referenced fiber sensor uses stimulated Brillouin scattering to measure physical quantities without interferometric modules.
A signal processing method classifies bright/dark images into image-forming and non-image-forming regions to replace distorted intensities with representative values.