| 摘要 |
The eyepiece optical system of the invention is characterized by comprising, in order from the display plane side on which images being viewed are formed toward the exit side, a first lens component of positive refracting power, a reflecting member having only one reflective surface, a second lens component of negative refracting power and a third lens component of positive refracting power. The lens component here means a lens block that, in an optical path involved, contacts air at only two surfaces: the display-plane-side refractive surface and the exit-side refractive surface.
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