| 摘要 |
A projecting device for displaying electrical images. The projecting device has an illumination device for emitting a polarized trichrome light, three modulating devices for modulating three polarized monochrome lights to display the same electrical image, a light separating device having a first dichroic mirror and a third polarization beam splitting mirror arranged along a first diagonal direction and a first and a second polarization beam splitting mirrors arranged along a second diagonal direction, and a first retarder film installed between the second and the third polarization beam splitting mirrors. The first dichroic mirror, the first and second polarization beam splitting mirrors are used for separating the polarized trichrome light into three monochrome lights and passing each monochrome light to a correspondent modulating device for optical modulation. The three modulated lights reflected from the three modulating devices are transmitted to the third polarization beam splitting mirror and synthesized into an output light beam for displaying the electrical image.
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