Optical module with integrated source of light
View Patent ↗An optical module includes a lens arrangement which is used to project electromagnetic radiation to a semiconductor element and a light source disposed in the surrounding area of the radiation inlet area of the lens arrangement. The lens arrangement and the light source are provided with a covering which is permeable to electromagnetic radiation. The covering is provided with a radiation barrier that blocks the radiation which is emitted by the light source and prevents a direct injection of radiation which is emitted by the light source into the lens arrangement.
1. An optical module, comprising:
a semiconductor element forming an image sensor;
a lens arrangement for projecting electromagnetic radiation onto said image sensor, said lens arrangement having a radiation inlet area;
a light source disposed within a surrounding area of said radiation inlet area of said lens arrangement;
a cover enclosing said lens arrangement and said light source, said cover being permeable to the electromagnetic radiation;
a radiation barrier integrated into said cover, said radiation barrier being impermeable to radiation emitted by said light source and being disposed to prevent direct injection of radiation emitted by said light source into said lens arrangement and to prevent light injected into said cover from entering said radiation inlet area in a transverse direction.
2. The optical module according to claim 1 , wherein said radiation barrier is disposed circumferentially about said radiation inlet area of said lens arrangement.
3. The optical module according to claim 1 , wherein said lens arrangement includes a lens holder and said radiation barrier is configured to border said lens holder.
4. The optical module according to claim 1 , wherein said radiation barrier is connected to said cover in a form-fit.
5. The optical module according to claim 1 , wherein said radiation barrier and said cover are integrally formed in one piece.
6. The optical module according to claim 1 , wherein said cover is formed with a structuring at least on a side thereof facing at least one of said light source and said lens arrangement.
7. The optical module according to claim 6 , wherein said structuring is formed to guide a beam path of the electromagnetic radiation.
8. The optical module according to claim 1 , wherein said cover is formed with an even or homogonously flat surface on a side thereof facing away from at least one of said light source and said lens arrangement.
9. The optical module according to claim 1 , wherein said light source is one or more diodes at least partly surrounding said lens arrangement.
10. The optical module according to claim 9 , wherein said diodes are light emitting diodes or laser diodes.
11. The optical module according to claim 1 , wherein said cover is connected to a housing of the optical module in a form-fit.
12. The optical module according to claim 1 , wherein further comprises a housing, and said cover, together with said radiation barrier, is snapped into said housing.
13. The optical module according to claim 1 , wherein said cover has a different configuration in a region of said lens arrangement than within a region of said light source.
14. The optical module according to claim 13 , wherein said cover has a different cross section in the region of said lens arrangement than within the region of said light source.