Patent ID: 6282028
Filing Date: 2001-08-28
Classification: G01C,G02B

Abstract:
A beamsplitter for use in an optical alignment tool having a light source (1) for emitting a primary light beam (P) and a collimator (2) arranged downstream of the light source (1) for collimating the primary light beam (P), the beamsplitter comprising at least two reflecting surfaces (6; 26) extendable into a path of a collimated light beam for emitting two output beams and to be located at a same distance from the collimator (2), the at least two reflecting surfaces (6; 26) forming a right angle with each other so that the two reflecting surfaces, when used in the optical alignment tool, are inclined each at an angle of 45.degree. to a propagation direction of a collimated primary light beam (P); and a light passage (29) provided in a space between the reflecting surfaces (6, 26) and to be located substantially symmetrical to an optical axis of the collimator for enabling passing through the light passage (29) a central portion (M) of the collimated primary light beam.