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15.12 Related Parts for Reflector
1. The Tribrach and Adapter for Reflector
The plate vial and optical plummet in the adapter and plate vial should be checked,
refer to Session 15.1 and 15.7
2.
Perpendicularity of the prism pole
As shown in picture in Session 13.8, mark ‘+’ on Point C, place the tine of the prism pole
on the Point C and do not move it during the inspection. Place the two feet tine of Bipod on
Point E and F on the cross lines. Adjust the two legs to make the bubble on the prism pole
centered.
Set and level the instrument on Point A near the cross. Sight tine of Point C with the
center of reticle, and fix the Horizontal Clamp Screw. Rotate the telescope upward to make D
near the horizontal hair. Flex the prism pole Leg e to make the D in the center of reticle. Then
both Point C and D are on the central line of reticle.
Set the instrument on Point B on the other cross lines. Flex the leg F and make point D on
the prism pole overlapped with central line of the point C’s cross lines.
Through the collimation on Point A and B, the prism pole has been set perpendicular. If
then the bubble deviates from the center, adjust the three screws under circular vial to make
the bubble centered, refer to Session 13.2.
Check and adjust again until the bubble is in the center of the vial from both directions.
