Positioning of optical coupling points

The invention relates to a method and a device (200) for positioning an optical coupling point (11), and to a method for producing a microstructure (100) at an optical coupling point (11). The method for positioning a light coupling point (11) comprises the following steps: a) providing an optical component (10) comprising a light coupling point (11) having an interaction region (15) located outside a volume surrounded by the optical component (10); b) generating light radiation in a production region (120), the production region (120) at least partially overlapping the interaction region (15) of the light coupling point (11), light being applied to a medium (19) located in the production region (120), the medium (19) altering the light in order to generate the light radiation; c) capturing at least a part of the generated light radiation in a capturing region (130), which at least partially overlaps the interaction region (15) of the light coupling point (11), and determining a spatially resolved distributio