| 摘要 |
<p>A color display is produced by overlaying two images (20A, 20B) from a single light valve (18). Filters (16A, 16B) are used to select the two primary colors used in the display. The two projection beams are folded by mirrors (26, 28) and merged onto a dichroic mirror (30) where they combine so that they follow an identical path to the screen (34). The dichroic mirror is positioned so that the two projection beams are equivalent when they strike the dichroic mirror. The dichroic mirror is an interference filter which reflects the spectral band passed by the first filter over a range of incident angles and transmits the spectral band passed by the second filter over the same range of angles.</p> |
