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US 10,649,177 B2Granted
Camera lens
AssigneeAac Acoustic Technologies (Shenzhen) Co., Ltd.
InventorsChiaCheng Lin, Hiroyuki Teraoka
Life of this patent
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Abstract
The present disclosure provides a small-sized camera lens with good optical properties, and comprises four lenses having a bright F-number. The camera lens includes, from an object side to an image side, a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power and a fourth lens having a negative refractive power. The camera lens satisfies specified relational expressions.
Claims3
A camera lens, comprising, from an object side to an image side:
- a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power and a fourth lens having a negative refractive power, the camera lens satisfying following relational expressions (1) to (6):
- 0.50f1/f0.68 (1)
- −1.50f2/f−1.30 (2)
- −0.50f1/f2−0.45 (3)
- −0.90(R1+R2)/(R1−R2)−0.60 (4)
- 0.15(R3+R4)/(R3−R4)0.85 (5)
- 1.10(R7+R8)/(R7−R8)3.00 (6),
- wherein
- f denotes an overall focal length of the camera lens,
- f1 denotes a focal length of the first lens,
- f2 denotes a focal length of the second lens,
- R1 denotes a curvature radius of an object side surface of the first lens,
- R2 denotes a curvature radius of an image side surface of the first lens,
- R3 denotes a curvature radius of an object side surface of the second lens,
- R2 denotes a curvature radius of an image side surface of the second lens,
- R7 denotes a curvature radius of an object side surface of the fourth lens, and
- R8 denotes a curvature radius of an image side surface of the fourth lens.
14 more elements
Dependencies are inferred from the claim text.