Abstract: An illumination device (100) comprising a light-guide (104) configured to guide light from an entrance end (108) to an exit end (110); a partially transparent partition (106) arranged in said light-guide and configured such that light of a given wave length incident thereupon is partially transmitted and partially reflected, wherein said partially transparent partition (106) extends along at least a portion of said light guide, and divides that portion of the light-guide in first (104a) and second (104b) separated regions; a first light emitting device (102) arranged to incouple light to at least said first region (104a) ; and a second light emitting device (103) arranged to incouple light to at least said second region (104b). An advantage is that uniform illumination can be achieved also in applications where the length of the illumination device is restricted, e.g. for a retro-fit unit.

Abstract: A drum-shaped workpiece (37) is machined according to a method whereby the workpiece (37) is fastened to a rotatable holder (1) of a machine tool (3) by means of an adhesive (45), for example a mixture including rosin and beeswax, such that a centerline (51) of the workpiece (37) coincides substantially with an axis of rotation (19) of the holder (1). This adhesive (45) is exclusively provided between the holder (1) and support surfaces (47, 49) of the workpiece (37) directed substantially parallel to the centerline (51), the workpiece (37) being brought into connection with the holder (1) exclusively via the adhesive (45). It is achieved thereby that mechanical stresses in the workpiece (37) caused by the fastening of the workpiece (37) to the holder (1) are as small as possible. A dimensional accuracy which the workpiece (37) has after being machined by the machine tool (3) and before being removed from the holder (1) thus remains intact when the workpiece (37) is removed from the holder (1).