| 摘要 |
A method of manufacturing different types of image display apparatuses includes the steps of producing a lens barrel (housing) for holding optical elements, the lens barrel being commonly usable in the different types of image display apparatuses; selecting one type of image display apparatus to be manufactured among the different types of image display apparatuses; and manufacturing the one type of image display apparatus using the common lens barrel. In the image display apparatus manufactured by the method mentioned above, selective use of retainers for retaining the optical elements included in the illumination system, when arranging at least two different types of the illumination systems varying according to whether or not microlenses are provided, enables the different types of illumination systems to be easily constituted in accordance with the characteristics of image display elements varying according to whether or not microlenses are provided, and so on.
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