Camera optical lens
AssigneeChangzhou Raytech Optronics Co., Ltd.
InventorJiekang Chen
Life of this patent
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Abstract
The present disclosure relates to optical lens, and provides a camera optical lens including eight lenses, from an object side to an image side in sequence: a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a negative 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, and an eighth lens having a negative refractive power; wherein the camera optical lens satisfies the following conditions: 0.95≤f/TTL; −4.00≤f2/f≤−1.80; and −20.00≤(R15+R16)/(R15−R16)≤−3.00. The camera optical lens can achieve good optical performance while meeting design requirements for a long focal length and ultra-thinness.
Claims11
A camera optical lens comprising eight lenses, from an object side to an image side in sequence:
- a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a negative 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, and an eighth lens having a negative refractive power;
- wherein the camera optical lens satisfies the following conditions:
- 0.95≤f/TTL;
- −4.00≤f2/f≤−1.80;
- and
- −20.00≤(R15+R16/(R15−R16)≤−3.00;
- 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;
- R15 denotes a central curvature radius of an object-side surface of the eighth lens;
- and
- R16 denotes a central curvature radius of an image-side surface of the eighth lens.
Dependencies are inferred from the claim text.