OCULAR LENS AND OBSERVATION DEVICE INCLUDING THE SAME, AND IMAGING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide an ocular lens having high optical performance in spite of being lightweight.SOLUTION: An ocular lens comprises five or more lenses including two or more resin lenses having aspherical lens surfaces and including two or more lenses having negative refractive power. A material of a lens arranged closest to an observation side in the ocular lens is a glass material. When Rdens represents specific gravities of materials of the resin lenses, all the materials of the resin lenses included in the ocular lens satisfy a conditional expression: 0.5