Optical imaging lens
An optical imaging lens, lens technology, applied in optics, optical components, instruments, etc., can solve problems such as poor imaging quality
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Embodiment 1
[0050] Such as Figure 1 to Figure 25 As shown, along the optical axis direction of the optical imaging lens, the first lens E1, the second lens E2 and the third lens E3 are sequentially included from the object side to the image side, the first lens E1 has a positive refractive power; the second lens E2 has a negative light Focus; the third lens E3 has positive refractive power; wherein, the effective focal length f of the optical imaging lens satisfies: f>20mm; the effective focal length f of the optical imaging lens and the effective focal length f2 of the second lens satisfy: -3.0<f / f2<-2.0.
[0051] Through the rational arrangement of the focal power, astigmatism and distortion can be effectively reduced, and the imaging quality of the optical imaging lens can be greatly improved. A lens that uses a combination of positive, negative, and positive can better demonstrate the performance of the optical system. The purpose of reasonably controlling the effective focal leng...
Embodiment 2
[0066] The optical imaging lens includes a first lens E1, a second lens E2 and a third lens E3 in sequence from the object side to the image side along the optical axis of the optical imaging lens. The first lens E1 has a positive refractive power; the second lens E2 has a negative optical power. focal length; the third lens E3 has a positive refractive power; wherein, the effective focal length f of the optical imaging lens satisfies: f>20mm; the effective focal length f of the optical imaging lens and the maximum half field of view Semi-FOV of the optical imaging lens meet : 2.5<f*tan(Semi-FOV)<3.5.
[0067] Through the rational arrangement of the focal power, astigmatism and distortion can be effectively reduced, and the imaging quality of the optical imaging lens can be greatly improved. A lens that uses a combination of positive, negative, and positive can better demonstrate the performance of the optical system. The purpose of reasonably controlling the effective focal ...
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