Patent ID: 8611022

Claim:
An optical receiver lens comprising: a three-dimensional lens surface on a receiving side of the optical receiving lens for arrangement facing toward a reflecting object and for receiving laser radiation, reflected by the an object emitted by a laser distance measuring device, wherein the receiver lens is defined in a three-dimensional coordinate system having three axes x, y, z arranged at right angles to one another, and the z-axis coinciding with the optical axis of the receiver lens, wherein the lens surface includes at least one aspheric surface section, wherein the at least one aspheric surface section of the lens surface is defined by the addition of a first surface area, whose sag along the z-axis is defined by a first function f 1 of x and y, such that z 1 = f 1 ⁡ ( x , y ) = d - r 2 R 0 ⁡ ( 1 + 1 - e ⁡ ( r 2 R 0 2 ) ) , wherein d is lens thickness, r (radius) is equal to √{square root over (x 2 +y 2 )}, R 0 is a base curvature radius of the lens surface, e is a conic parameter, and z 1 is the sag of the first surface along the distance from a vertex of the lens in the x-y plane, and of a second surface area, whose sag along the z-axis is defined by a second function f 2 of x and not of y, such that z 2 =f 2 (x).