Optical imaging system
AssigneeZhejiang Sunny Optical Co., Ltd
InventorsKaiyuan ZHANG, Yuanlin JIA
Life of this patent
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Abstract
The present disclosure discloses an optical imaging system. The optical imaging system includes, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. Each of the first lens and the fourth lens may have a negative refractive power. Each of the second lens and the sixth lens may have a positive refractive power or a negative refractive power. An effective focal length f3 of the third lens and an effective focal length f5 of the fifth lens may satisfy: 0<f3/f5<0.8.
Claims20
An optical imaging system comprising, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens,
- wherein each of the first lens and the fourth lens has a negative refractive power;
- each of the second lens and the sixth lens has a positive refractive power or a negative refractive power;
- and
- an effective focal length f3 of the third lens and an effective focal length f5 of the fifth lens satisfy:
- 0<f3/f5<0.8.
An optical imaging system, having a total effective focal length f, the optical imaging system comprising, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens,
- wherein the first lens has a negative refractive power;
- each of the second lens and the sixth lens has a positive refractive power or a negative refractive power;
- and
- a combined refractive power of the third lens, the fourth lens and the fifth lens is a positive refractive power,
- wherein at least one of the third lens, the fourth lens or the fifth lens has a negative refractive power, and a combined focal length f345 of the third lens, the fourth lens, and the fifth lens satisfies:
- 0.5<f/f345<0.9.
An optical imaging system comprising, sequentially along an optical axis from an object side to an image side, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, the six lenses having refractive powers,
- wherein each of the first lens and the fourth lens has a negative refractive power;
- each of the third lens and the fifth lens has a positive refractive power;
- at least one of the second lens or the sixth lens has a positive refractive power;
- and
- a sagittal height SAG61 of an object-side surface of the sixth lens at a maximum radius and a center thickness CT6 of the sixth lens on the optical axis satisfy:
- |SAG61|/CT6<1.
Dependencies are inferred from the claim text.