| 摘要 |
The setting distance between a DMD element and a projection lens is maintained accurately to display a high-quality image on a screen or the like. A projection lens unit is one in which light from a light source lamp side is reflected on the DMD element as image light and is subsequently projected at a projection lens. The projection lens unit includes a coupling tool that fixes the DMD element and the projection lens integrally in a state where the distance therebetween is accurately supported to a set value. The coupling tool has a color wheel fitting portion positioning and supporting a color wheel, a relay lens fitting portion positioning and supporting a relay lens, a reflection mirror fitting portion positioning and supporting a reflection mirror, a DMD element mounting portion in which the DMD element is mounted and supported, and a projection lens portion in which the projection lens is mounted and supported.
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