| 摘要 |
An emission device (1) for emitting a light beam of controlled spectrum, includes: at least two separate light sources (Si to N) each emitting a light beam of wavelength λ1 or λ2, and spectral multiplexing elements (25). The spectral multiplexing elements (25) include an optical assembly (25) formed from at least one lens (25) and/or an optical prism. The optical assembly (25) has chromatic dispersion properties and moves the light beams spatially closer together. Moreover, each light beam having at least wavelength λ1 or λ2 propagates in free space from the corresponding light source (Si to N) to the optical assembly (25). Therefore the emission device (1) is particularly robust. It can have small dimensions and be produced at low cost. |
