Jing LI, Wei ZHANG, Bin SHAO, Xing FAN, Peng ZHANG, Weimin CHEN. Low-coherence Heterodyne Interference Clearance Measurement Technology Based on Differential Detection[J]. Acta Photonica Sinica, 2021, 50(9): 0906004
- Acta Photonica Sinica
- Vol. 50, Issue 9, 0906004 (2021)
Fig. 1. Schematic diagram of low-coherence heterodyne interference clearance measurement based on differential detection
Fig. 2. The relationship between output voltage and VDL optical path and clearance
Fig. 3. Schematic diagram of experimental system
Fig. 4. Time domain and frequency domain signals of 4 mm clearance
Fig. 5. Power spectral intensity curves for single-ended versus differential input
Fig. 6. Comparison of experimental results between single-ended input and differential input
Fig. 7. Relationship of theoretical measurement uncertainty of system and measuring clearance
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