Patent ID: 6281968
Filing Date: 2001-08-28
Classification: G01S

Abstract:
A laser distance-measuring instrument for large measuring ranges having a transmitting channel and a receiving channel arranged parallel to one another, the transmitting channel comprising:a transmitting lens with an optical transmission axis at whose focal point a laser light source is arranged; andthe receiving channel comprising:a receiving lens in whose focal plane a receiver is arranged;said receiving lens being a modified single lens comprising a primary lens region with a primary optical reception axis which is aligned parallel to the optical transmission axis, as well as a secondary lens region with a secondary optical reception axis which is inclined to the primary optical reception axis at an angle .alpha., with the result that a primary focal point and a secondary focal point are produced;said secondary lens region having an equilateral trapezoidal shape which runs with mirror symmetry relative to a plane defined by the optical axes, and becomes narrower in the direction of the optical transmission axis.