Microscope objective lens and microscope using the same

A microscope comprising:

• a stage for supporting an object to be observed;
• a light source system for supplying illumination light for illuminating the object to be observed supported by said stage;
• light guide means for deflecting an optical path of the illumination light emitted from said light source system in a direction of the object to be observed;
• and
• a microscope objective lens for guiding the illumination light from said light guide means toward the object to be observed, and acting on light reflected by the object to be observed,
• wherein said light guide means guides light reflected by the object to be observed and transmitted through said microscope objective lens in a direction different from the direction of said light source system, and
• said microscope objective lens comprises:
• a front group having positive refracting power to convert a beam from the object to be observed into a convergent beam, and having a positive meniscus lens element with a concave surface facing the object to be observed, and a plurality of cemented lens components disposed at the image side of said positive meniscus lens;
• and
• a rear group having negative refracting power, having a negative lens element and a positive lens element which is cemented with said negative lens element, and disposed at the image side of said front group,
• in which said cemented lens component disposed nearest to the image side in said front group satisfies:
• .vertline.R.sub.1 .vertline./f>100
• .vertline.R.sub.2 .vertline./f>20
• where R.sub.1 is a radius of curvature of a lens surface on the side of the object to be observed of said last cemented lens component, R.sub.2 is a radius of curvature of a lens surface on the image side of said last cemented lens component, and f is a focal length of said microscope objective lens.