Fig. 1. Imaging system schematic diagram of fiber fusion splicer instrument

Fig. 2. Schematic diagram of objective focusing observation

Fig. 3. Beam through fiber core

Fig. 4. Beam deviates fiber core

Fig. 5. Projection height of beams with different incident angles

Fig. 6. Schematic diagram of thin lens group

Fig. 7. Layout of microscope objective

Fig. 8. Spot diagrams

Fig. 9. Curvature and distortion

Fig. 10. Relative illumination

Fig. 11. Spherical aberration

Fig. 12. MTF curves

Fig. 13. Tolerance analysis of MTF

Fig. 14. Imaging simulation of compact fiber microscope objective

Fig. 15. Irradiance diagram of detector 1

Fig. 16. Irradiance diagram of detector 2 with illumination uniformity of 0.73

Fig. 17. Irradiance diagram of detector 2 with illumination uniformity of 0.85

Fig. 18. Irradiance diagram of detector 2 with illumination uniformity of 0.98