| 摘要 |
<p>A compact imaging lens comprises sequentially from the object side by: a first negative lens having a meniscus shape with the convex surface directed to the object side; a second lens being positive; and a positive third lens, the image-side surface of which is convex. The first lens, the second lens, and the third lens are configured by bi-aspherical plastic lenses. The second lens is a bi-convex lens in which the absolute value of the radius of curvature of the object-side surface is smaller than that of the image-side surface. An aperture diaphgram is located between the second and the third lens. The compact imaging lens further fulfils a set of inequalities.</p> |
