Precision of linear and angular bisecting of graticules in sighting and measuring telescopes

Conclusions

1. The angular rhombic, square, and zig-zag graticules have large measurement ranges and serve to test precisely coaxiality, linearity, and flatness of products by means of sighting and measuring telescopes type PPS-11 and cathetometers KM-7 at distances up to 30 m. 2. The graticules with linear bisectors and concentric circumferences are limited for precise measurements to values on the telescope graduated barrels not exceeding 2 mm and on the graticule scale up to 1 mm. 3. The confidence errors in sighting graticules with linear and angular bisectors does not exceed 2″ for measuring telescopes type PPS-11 and cathetometers KM-7. 4. The best relationship between the linear and angular graticule bisector widths for a symmetrical superposition upon it of the sighting telescope's cross-hair visible image should be 3∶1.