| 摘要 |
A color corner of a projection system includes a dichroic filter having a flat plate type structure, thereby achieving an improvement in color separation characteristics while allowing easy manufacture of the dichroic filter. The projection system includes an illumination unit for separating an S-polarized light from a non-polarized white light, a polarized beam splitter for transmitting a selected one of the R, G, and B components of the light received from the illumination unit while reflecting the remaining two components of the incident light, and a flat plate type dichroic filter for defining different transmission and reflection optical paths for the separated two light components, respectively, thereby separating the two light components reflected by the polarized beam splitter.
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