| 摘要 |
PROBLEM TO BE SOLVED: To provide a microscope objective lens where chromatic aberration is sufficiently corrected, which has a sufficient visual range, and where various aberrations in the visual range are satisfactorily corrected. SOLUTION: The microscope objective lens OL includes, in order from the object side, a first lens group G1 having positive refractive power, a second lens group G2 and a third lens group G3 having negative refractive power, wherein the first lens group G1 includes a positive lens component L1 located nearest to the object side, with a lens surface having negative refractive power, the second lens group G2 includes a diffraction optical element GD with a diffractive optical surface D in which two diffraction elements of different optical materials are cemented and a diffractive grating groove is formed on the cemented interface thereof, and the third lens group G3 includes at least one or more color correction lens components CL31 having negative refractive power. The lens surface nearest to the image side in the third lens group G3 is a concave surface directed to the image side. COPYRIGHT: (C)2010,JPO&INPIT |
