Among the well-known features of the current Concenter SE series and the TS Concenters 2 Z, a new self-luminous function is added, so that the concentric circles in the dark glow uniformly. Batteries or other power sources are not necessary. The disc side of the Concenter Ray's is only briefly under a light source (white light), z. Car interior lighting, flashlight or the like held.

The concentric rings on the disc now shine clearly visible for about 5 minutes, which considerably facilitates adjustment in the dark. The external illumination with an astrolamp like the Concenter SE is still possible.

The adjustment takes place directly over the edge of the mirror so that an exact match of the optical light surfaces is given even taking into account the Offset.Die round mirror surfaces are here only concentric (symmetrical) adjusted to each other.