| 摘要 |
A projection system includes a projector for emitting a light beam; a screen and a first medium for converting a linear polarized form of the light beam from the projector to a quasi-circular polarized form of the light beam polarized in a first circular sense. The projector also includes a mirror for reflecting and phase shifting a quasi-circular polarized form of the light beam to a circular polarized sense substantially opposite of that exhibited by the light beam before being reflected by the mirror, and a second medium optically disposed between the mirror and the screen and for selectively converting the light beam between linear polarization and quasi-circular polarization. The projection system also includes a reflective linear polarization filter optically disposed between the second medium and the screen and for reflecting the light beam exhibiting linear polarization of a first linear sense and transmitting the light beam exhibiting linear polarization of a second linear sense substantially perpendicular to that of the first linear sense.
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