Patent ID: 7474480
Filing Date: 2009-01-06
Classification: G02B

Abstract:
1. A subminiature imaging optical system comprising: a first lens having overall positive refractive power, the first lens comprising a first lens part having a convex object-side surface; a second lens part having an object-side surface in contact with an image-side surface of the first lens part; and a third lens part having an object-side surface in contact with an image-side surface of the second lens part; and a second lens having overall positive refractive power, the second lens comprising a fourth lens part having an object-side surface with a convex center and a concave peripheral portion, about an optical axis; a fifth lens part having an object-side surface in contact with an image-side surface of the fourth lens part; and a sixth lens part having an object-side surface in contact with an image-side surface of the fifth lens part, wherein the second lens part has a stop provided on one of the object-side surface and the image-side surface thereof to adjust light amount.