Light applicator system with protective sleeve

A light applicator system for examination and/or treatment of an organic body, the light applicator system comprising:

• at least one light applicator;
• a positioning element;
• and
• an elastically deformable and/or movable engagement element,
• wherein the light applicator comprises a distal-side insertion portion with at least one actively light-emitting element at the distal end for piercing tissue of the organic body,
• wherein the insertion portion comprises a needle tip arranged at least partially distally of the at least one actively light-emitting element and tapering distalwards,
• wherein the positioning element is fixable at least temporarily in a defined position and orientation relative to the organic body and has at least one receptacle for the at least one light applicator, in which the at least one light applicator has, at least temporarily, a defined orientation relative to the organic body,
• wherein the light applicator further comprises a protective sleeve which is axially movable relative to the insertion portion and which in a first axial position relative to the insertion portion protectively surrounds the needle tip and in a second axial position, determined by an axial position of the insertion portion relative to the positioning element, is pushed back relative to the insertion portion proximalwards from the needle tip,
• wherein the protective sleeve serves as an insertion sleeve into the at least one receptacle of the positioning element,
• wherein the engagement element is arranged between the insertion portion and the protective sleeve such that the engagement element elastically yields or moves upon overcoming an axial force to such an extent that the protective sleeve can reach the first axial position distalwards and/or can leave the first axial position proximalwards, and
• wherein the engagement element is a first of at least two elastically deformable and/or movable engagement elements with a second engagement element and the axial force is a first axial force of at least two axial forces with a second axial force, wherein the second engagement element is arranged between the protective sleeve and the at least one receptacle of the positioning element such that, upon overcoming the second axial force, the second engagement element elastically yields or moves to such an extent that the protective sleeve can reach the desired position in the positioning element distalwards and/or leave the desired position in the positioning element proximalwards.