Camera optical lens
AssigneeRaytech Optical (Changzhou) Co., Ltd.
InventorWen Sun
Life of this patent
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Abstract
The present disclosure provides a camera optical lens including eight lenses which are, from an object side to an image side in sequence: a first lens having a positive refractive power, a second lens having a positive refractive power, a third lens having a positive refractive power, a fourth lens having a negative refractive power, a fifth lens having a negative refractive power, a sixth lens having a positive refractive power, a seventh lens having a negative refractive power, and an eighth lens having a negative refractive power; the camera optical lens satisfies conditions of: 0.95≤f/TTL; 3.00≤f2/f≤5.00; and 3.50≤(R9+R10)/(R9−R10)≤30.00. The camera optical lens can achieve good optical performance while meeting the design requirements for large aperture, long focal length and ultra-thinness.
Claims10
A camera optical lens comprising eight lenses which are, from an object side to an image side in sequence:
- a first lens having a positive refractive power,
- a second lens having a positive refractive power,
- a third lens having a positive refractive power,
- a fourth lens having a negative refractive power,
- a fifth lens having a negative refractive power,
- a sixth lens having a positive refractive power,
- a seventh lens having a negative refractive power, and
- an eighth lens having a negative refractive power;
- wherein the camera optical lens satisfies conditions of:
- 0.95≤f/TTL;
- 3.00≤f2/f≤5.00;
- and
- 3.50≤(R9+R10)/(R9−R10)≤30.00;
- where
- TTL denotes a total optical length from an object-side surface of the first lens to an image surface of the camera optical lens along an optical axis;
- f denotes a focal length of the camera optical lens;
- f2 denotes a focal length of the second lens;
- R9 denotes a central curvature radius of an object-side surface of the fifth lens;
- R10 denotes a central curvature radius of an image-side surface of the fifth lens.
Dependencies are inferred from the claim text.