| 摘要 |
A head up display apparatus adapted to be mounted on a user's head in a goggle type or head gear type arrangement and enable a video image to be observed, wherein an original image is directed to an eyeball through a reflecting optical system to enable the image to be observed, and one or more members differing in power depending on the azimuth direction are present in the reflecting optical system. The members are designed to have an aspherical surface action in the cross-section of at least one azimuth direction.
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