Subminiature optical system

摘要

Disclosed herein is a subminiature optical system including: a first lens group having positive refractive power; a second lens group having negative refractive power; and a third lens group having positive refractive power, wherein the second lens group is configured of a plurality of lenses of which facing surfaces are bonded to each other and the following Conditional Equation is satisfied:
n1, n3>1.7  [Conditional Equation].

主权项

1. A subminiature optical system comprising:
a first lens group having positive refractive power; a second lens group having negative refractive power, wherein an object-sided lens of the second lens group has concave surfaces on both sides, an image-sided lens of the second lens group is a meniscus type lens, and an image-sided surface of the object-sided lens and an object-sided surface of the image-sided lens are combined together without an air gap therebetween; and a third lens group having positive refractive power, wherein the following Conditional Equation is satisfied:
n1, n3>1.7  [Conditional Equation], where n1 indicates refractive power of a lens configuring the first lens group and n3 indicates refractive power of a lens configuring the third lens group.