| 摘要 |
The present invention relates to a method for combining or for splitting the beam paths of substantially nonpolarized light of at least three different wavelength intervals. The splitting or the combining of the beam path of light of those wavelength intervals located between the other wavelength intervals takes place when the beam paths of the light of the two other wavelength intervals are already or still combined. The present invention also relates to an illumination unit comprising a white light source and utilizing this method by means of interference filters for splitting the white light into red, blue and green light beams. The invention also relates to an illumination unit comprising a red, green and blue light source and utilizing these methods by means of interference filters for the combination of the beam paths of the light sources.
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