| 摘要 |
A microscope objective includes, in order from the object side, a first lens unit with positive refracting power, having two meniscus lenses, each with a concave surface facing the object side, and at least one positive lens; a second lens unit with positive refracting power; and a third lens unit having concave surfaces adjacent and opposite to each other configured as air contact surfaces. The microscope objective satisfies the following conditions: <?in-line-formulae description="In-line Formulae" end="lead"?>7<=f<?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>0.5<NA<?in-line-formulae description="In-line Formulae" end="tail"?> where f is the focal length (mm) of the microscope objective and NA is the numerical aperture of the microscope objective on the entrance side.
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