By Light Interference (e.g., Interferometer) Patents (Class 356/450)
- By fiber or waveguide interferometer (e.g., Sagnac effect) (Class 356/460)
- Four frequency, multi-oscillator, non-planar cavity (Class 356/467)
- Cavity output beam combiner (Class 356/468)
- Cavity mirror details (Class 356/469)
- Passive cavity (laser source outside cavity) (Class 356/470)
- Multi-axis cavity (Class 356/471)
- Lock-in prevention (Class 356/472)
- Multiplexed sensor array (Class 356/478)
- Having a short coherence length source (Class 356/479)
- Resonant cavity (Class 356/480)
- Refraction indexing (Class 356/481)
- For distance or displacement measurement (Class 356/482)
- Plural counter-propagating beams (e.g., non-motion Sagnac device) (Class 356/483)