Patent ID: 8731392

Claim:
A luminous unit for an optical recording device comprising: a light source for generating radiation a partly reflective element, which is disposed downstream of the light source in a main emission direction and subdivides a space into a first half-space facing the light source and a second half-space remote from the light source, wherein the partly reflective element at least partly transmits the radiation coming from the light source from the first half-space and at least partly reflects the external radiation coming from an opposite direction from the second half-space, wherein the partly reflective element is a partly transmissive mirror, wherein the luminous unit comprising a beam-shaping optical element having a radiation exit surface and a radiation entrance surface, wherein the partly reflective element is arranged on the radiation entrance surface of the beam-shaping optical element, and wherein the radiation entrance surface is concavely curved and the partly reflective element has a curvature corresponding to the radiation entrance surface.