| 摘要 |
According to the present invention the magnifier lens comprises two lens elements. More specifically, from a front, eye side to a rear, object side there is a front, positive lens element, and a rear, meniscus lens element. The front, positive power lens element has at least one aspheric surface and an Abbe V-number V1. The rear, meniscus lens element has an Abbe V-number V2. The front and the rear lens elements, in combination, contain at least one diffractive surface. The rear, meniscus lens element has front and rear refractive surfaces, both of which are concave toward the object side. The rear refractive surface is positionable within 5 mm of an associated object to be viewed from the eye side. This rear surface is an aspheric surface of negative refractive power. The Abbe V-numbers satisfy the following inequalities 50.4<V1<65, 25.4<V2<40, and V1-V2>25.
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