Patent ID: 8757809

Claim:
An illumination device comprising: at least a first light source; said first light source generates a first light beam having a first spectral distribution; said first light beam propagates primarily in a first direction along an optical axis; at least a second light source, said second light source generates a second light beam having a second spectral distribution; said second light beam propagates primarily in said first direction along said optical axis; at least a first dichroic reflector positioned at least partially in said first light beam and said second light beam; said first dichroic reflector transmits at least a part of said first light beam and reflects at least a part of said second light beam; reflecting means reflecting at least a part of said second light beam towards said first dichroic reflector; wherein said first light source, said reflecting means, said second light source and said first dichroic reflector are mutually arranged such that said second light beam propagates primarily in a second direction substantially opposite said first direction and towards at least a part of said first light source after being reflected by said reflecting means and such that at least a part of said second light beam propagates primarily in said first direction after being reflected by said first dichroic reflector.