Manufacture of optical light guides

A method for manufacturing optical light guide elements, the method comprising

• a) providing a plurality of initial bars, each initial bar extending along a respective initial-bar direction from a first bar end to a second bar end and having a first side face extending from the first bar end to the second bar end, the first side face being reflective;
• b) positioning the initial bars in a row with their respective initial-bar directions aligned parallel to each other and with their respective first surfaces facing towards a neighboring one of the initial bars;
• c) fixing the plurality of initial bars with respect to each other in the position achieved in step b) to obtain a bar arrangement;
• the method further comprising at least one of steps d), d′), d″):
• d) segmenting the bar arrangement into prism bars, each of the prism bars comprising a portion of at least two different ones of the plurality of initial bars, by conducting a plurality of cuts through the bar arrangement;
• d′) segmenting the bar arrangement into prism bars by separating the bar arrangement into parts along cut lines, wherein the cut lines are at an angle with the initial-bar directions;
• d″) segmenting the bar arrangement into prism bars by separating the bar arrangement into sections by creating cut faces which are at an angle with respect to the initial-bar directions;
• the method further comprising
• e) segmenting the prism bars into parts.