To enlarge the pupil diameter without enlarging a main operation member by specifying the pupil diameters being a luminous flux diameter of luminous flux made incident on an observer pupil position, and a conjugate magnification calculated from a main scan size being the luminous flux size of the luminous flux emitted from a main scan means.
When the pupil diameter being the luminous flux diameter of the luminous flux made incident on the pupil position of the observer is defined (d), and the main scan diameter being the luminous flux diameter of the luminous flux emitted from a main scan mirror 3 is d', the conjugate magnification β calculated by d/d' is constituted so as to satisfy 1.2≤β. That is, the main scan mirror 3 is arranged on a position becoming a nearly conjugated relation with the pupil 7 through an eyepiece 6, and the conjugate magnification β is not 1, and is constituted so as to satisfy 1.2≤β≤7. Then, the luminous flux emitted from a light source 1 is scanned by the main scan mirror 3 and a sub-scan mirror 4 to form a scanned image on a scanned image forming position 10. The luminous flux forming the scanned image is imparted to the pupil 7 of the observer through the eyepiece 6 to form a retina image on the retina 9 of an eyeball 8. A virtual image on a virtual image position 11 is observed by the observer through the retina image.
HAYASHI KOTARO
KASAI ICHIRO
OSAWA SATOSHI
SATO AKIRA
KOBAYASHI YASUSHI
