Variable grating diffracts incident light to form a multi-spectral diffraction pattern for absolute position measurement.
Composite two-dimensional cross grating suppresses higher diffraction orders to eliminate interpolation errors in high-precision measurement systems.
Removing telecentric lens reduces incremental signal distortion while maintaining high resolution.
A tape rule assembly uses a pivotable sensor holder and radial uncoiling bias to maintain critical distance between optical sensors and the tape surface.
Segmented light pulses with time offsets resolve range ambiguity constraints to boost mechanical disturbance detection bandwidth.
Replacing electrical sensors with an optical system eliminates interference risks while enabling easy cleaning and reliable patient monitoring.
Diffracting patterns on the encoding disc create distinct beam angles to resolve positioning limits and assembly complexity in optical encoders.
Chirped reference markings enable smaller scanning distances and simpler collimation by adjusting mean graduation periods to increase deflection angles.
Periodic wavelength modulation offsets pump attenuation to reduce nonlocal effects and improve spatial resolution.
Adjacent optical tracks minimize secondary maxima in reference pulse signals, ensuring reliable detection of signal maximum at defined positions.
Host and remote sensing devices exchange data via a single optical fiber using bidirectional signal transmission.
Code-division and wavelength-division multiplexing interrogate dense sensor networks without high-speed modulators, reducing measurement time.
Corrects phase saturation before high-pass filtering to eliminate output spikes and ripples, ensuring reliable vibration detection.