Light-emitting module, particularly for use in an optical projection apparatus
A light-emitting module is specified, comprising at least two light sources disposed on a common carrier. At least one of said light sources includes at least two LED chips. Each light source of the module is followed downstream by an optic body of an optical element, and the optic bodies are suitable for guiding electromagnetic radiation to a light exit surface of the optical element. An optical projection apparatus comprising such a light-emitting module is also specified.
1. A light-emitting module, comprising at least two light sources disposed on a common carrier and at least two optic bodies, wherein
at least one of said light sources includes at least two LED chips,
each said light source is followed downstream by one of said optic bodies of an optical element,
said optic bodies are suitable for guiding electromagnetic radiation to a single light exit surface of said optical element,
said optical element comprises said at least two optic bodies, each optic body comprising a light exit surface,
said optical element has said single light exit surface which is composed of the light exit surfaces of the optic bodies, and
said light exit surface of said optical element has convex subregions that are interconnected by concave subregions.
2. The light-emitting module as in claim 1 , wherein at least one of said optic bodies includes a non-imaging optical concentrator.
3. The light-emitting module as in claim 1 , wherein at least one of said optic bodies includes a truncated-pyramid optic.
4. The light-emitting module as in claim 1 , wherein at least one of said optic bodies includes an asymmetrical truncated-pyramid optic.
5. The light-emitting module as in claim 1 , wherein at least one of said optic bodies is configured as a solid body.
6. The light-emitting module as in claim 1 , wherein said optical element is configured in more than one piece.
7. The light-emitting module as in claim 1 , wherein said optical element is one-piece.
8. The light-emitting module as in claim 1 , wherein a light entrance surface of at least one of said optic bodies has an anti-reflection coating comprising a dielectric material.
9. The light-emitting module as in claim 1 , wherein said light entrance surface of at least one of said optic bodies has a periodic microstructure suitable for reducing the reflection of electromagnetic radiation.
10. The light-emitting module as in claim 1 , wherein said light exit surface of said optical element has an anti-reflection coating comprising a dielectric material.
11. The light-emitting module as in claim 1 , wherein said light exit surface of said optical element has a periodic microstructure suitable for reducing the reflection of electromagnetic radiation.
12. The light-emitting module as in claim 1 , wherein at least one said LED chip is unencapsulated.
13. The light-emitting module as in claim 1 , wherein a gap containing air is disposed between a light outcoupling surface of at least one said LED chip and a said light entrance surface of a said optic body.
14. The light-emitting module as in claim 1 , wherein the distance between said light outcoupling surface of said at least one LED chip and said light entrance surface of a said optic body is no more than 250 μm.
15. The light-emitting module as in claim 1 , comprising a holder to which said optic bodies are attached.
16. The light-emitting module as in claim 15 , wherein said optic bodies are integrally connected to said holder.
17. The light-emitting module as in claim 15 , wherein said holder surrounds said optic bodies on at least four sides.
18. The light-emitting module as in claim 15 , wherein said holder surrounds said light sources on at least four sides.
19. An optical projection apparatus comprising a light-emitting module according to claim 1 and a projection optic that is disposed downstream of said light-emitting module.