Method for producing optical beam splitter cubes

摘要

To produce optical beam splitter cubes, an optically transparent plate is provided with an optically active layer on a cover side. Then, on both cover sides of the plate, a plurality of prism bars are formed by molding an optically transparent material, so that a double prism plate is obtained. The prism bars are arranged on cover sides of the plate projecting roof-like in ridge lines separated from each other by valleys. Each prism bar has the cross section of an isosceles right-angled triangle, complemented by the prism bar lying opposite on the other cover side of the plate to form the cross section of the beam splitter cube. The double prism plate is cut up along the valleys between the prism bars and transverse to the longitudinal direction into segments which in each case form a beam splitter cube.

主权项

1. A method for producing optical beam splitter cubes which have a generally square cross section, wherein the method comprises:
a) providing an optically transparent plate having a first cover side and opposite thereto a second cover side, the plate having an optically active layer on the first or the second cover side, b) forming a double prism plate by sequentially performing a first and a second molding step, wherein in the first molding step optically transparent material is molded onto the first cover side of the plate so as to simultaneously form a plurality of first prism bars lying in parallel next to each other and wherein in the second molding step optically transparent material is molded onto the second cover side of the plate so as to simultaneously form a plurality of second prism bars lying next to each other, wherein the first prism bars are molded opposite the second prism bars with the first and second prism bars projecting from the respective first and second cover sides in roof-like ridge lines which are separated from each other by valleys following a longitudinal direction, wherein each prism bar has the cross section of an isosceles right-angled triangle and is complemented by a prism bar lying opposite it on the other cover side of the plate, wherein the optically transparent plate and the optically active layer are sandwiched between the opposing first and second prism bars and wherein the cross section of opposing pairs of first and second prism bars and of the plate sandwiched between the opposing pairs of first and second prism bars forms the cross section of one of the beam splitter cubes; and c) producing longitudinally extending prism rods each consisting of opposing pairs of first and second prism bars and a part of the plate sandwiched in between, by cutting the double prism plate longitudinally along the valleys between the prism bars and separating the prism rods transverse to the longitudinal direction into segments which each form one of the beam splitter cubes.