Patent ID: 7145648
Filing Date: 2006-12-05
Classification: G01C

Abstract:
1. A method of providing multiple beam paths in a surveying instrument comprising: providing an upper part that can be rotated about a vertical axis, said upper part including a telescope body that is swivelable about a tilt axis, wherein said vertical and tilt axes orthogonally intersect at an intersection point; providing at least two optical arrangements with optical beam paths set up in said telescope body; orienting each optical arrangement such that an associated optical beam path defines an optical axis which encloses a resultant angle having a vertex that lies substantially at said intersection point of said vertical axis and said tilt axis; rotating said upper part about said vertical axis with at least one of a first driving device and a first adjustment device; and turning said telescope body about said tilt axis with at least one of a second driving device and a second adjustment device.