| 摘要 |
An optical engine for use in a projection apparatus is disclosed, wherein the optical engine carries an illumination system and an imaging system for co-defining an optical axis, while a light beam emitted from the illumination system is transmitted to the imaging system along the optical axis. The optical engine comprises a chassis, a housing, a light tunnel apparatus and a holding edge. The dimensions of the receiving space defined by the holding edge and the housing are substantially constant and identical to the dimensions of the light tunnel apparatus comprised of a light tunnel and a bracket apparatus. The receiving space comprises a symmetry centerline coinciding with the optical axis to prevent the light beam from deviating away from the optical axis. To accommodate different resolutions, the differently sized light tunnels may fit into the receiving space, provided that the bracket apparatus comes in a size that can maintain constant dimensions after assembly with the light tunnel.
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