OPTICAL SYSTEM

Abstract: an optical system includes: a first lens having refractive power; a second lens having refractive power; a third lens having refractive power and comprising an image-side surface which is convex in a paraxial region; a fourth lens having refractive power; a fifth lens having refractive power and comprising an image-side surface which is concave in the paraxial region; a sixth lens having refractive power; and a stop disposed in front of an object-side surface of the first lens. the first to sixth lenses are sequentially disposed from an object side. a radius of the stop sd and an overall focal length of the optical system f satisfy: 0.2<sd/f<0.6. an aberration improvement effect and high degrees of resolution and brightness may be obtained.

Inventor(s): Yong Joo JO

CPC Classification: G02B13/0045 ({having five or more lenses})

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