| 摘要 |
PROBLEM TO BE SOLVED: To provide an imaging lens capable of improving weatherability, reducing performance degradation due to environmental change, and obtaining an optical performance excellent across a wide wavelength region from the visible wavelength region to the near-infrared wavelength region. SOLUTION: The imaging lens for forming an image of visible and near-infrared light includes, in order from the object side: a front group G1 that has a positive power; an aperture stop St; and a rear group G2 that has a negative power. In the imaging lens, all lenses are single lenses, and the rear group G2 includes a negative meniscus lens L5 that is disposed closer to the object side and has a surface convex oriented toward the object side, and a biconvex lens L6 that is disposed closer to the image side. COPYRIGHT: (C)2011,JPO&INPIT |
