Importance

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Abstract

This invention discloses an optical lens for image pickup, in order from an object-side to an image-side including a first lens, a second lens, a third lens and fourth lens. The first lens has positive refractive power. The second lens has negative refractive power. The third lens has positive refractive power. The fourth lens has negative refractive power with at least one inflection point on image-side surface. Wherein, each of the lenses has at least one aspheric surface. The optical lens for image pickup further includes an aperture stop and an image sensor. The aperture stop is disposed between the object and the second lens, and the image sensor is disposed at the image-plane. The optical lens for image pickup also satisfies with specific conditions.

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First Claim