Fig. 1. Test schematic

Fig. 2. Schematic of the board of the reading institutions

Fig. 3. Schematic of sine-like mechanism

Fig. 4. Schematic of micromotion reading subdivision mechanism

Fig. 5. Schematic of improved parallax detection setup

Fig. 6. Schematic of parallax determination collimator

Fig. 7. Structure schematic of sine-like micromotion reading setup

Fig. 8. Physical photo of common visibility check mirror. (a) SD-1; (b) SD-0.25

Fig. 9. Physical photo of the parallax test for YP-1# by using visual inspection mirror method

Fig. 10. SD-1 visibility value reading window. (a) VSD,YP-1#; (b) V'SD,YP-1#

Fig. 11. SD-0.25 visibility value reading window. (a) VSD,YP-1# =-1.75 SD (estimated); (b) V'SD,YP-1# =-1.98 SD (estimated)

Fig. 12. Test setup of digital photoelectric detection method

Fig. 13. Circular reticle image

Fig. 14. Reticle image of the sight to be measured

Fig. 15. Improved parallax detection setup

Fig. 16. Physical photo of the reading mechanism