Optical imaging module and device and electronic device
The present disclosure provides an optical imaging module, an optical imaging device and an electronic device. The optical imaging module includes a first lens group and a second lens group arranged in sequence from an object side to an imaging surface. The first lens group has a positive refractive power, and includes a first lens having a positive refractive power and a second lens having a negative refractive power arranged in sequence from the object side to the imaging surface. The first lens includes a convex object-side surface and a convex image-side surface. The second lens group includes a plurality of lenses with refractive power, and the plurality of lenses with refractive power include at least one movable lens configured to focus on objects to be photographed at different distances by moving along the optical axis.
1. An optical imaging module, comprising:
a first lens group arranged in a direction of an optical axis, having a positive refractive power and comprising:
a first lens, having a positive refractive power and comprising a convex object-side surface and a convex image-side surface; and
a second lens, having a negative refractive power,
the first lens and the second lens being arranged in sequence from an object side to an imaging surface; and
a second lens group arranged in the direction of the optical axis, and comprising:
a plurality of lenses with refractive power, comprising at least one movable lens configured to focus on objects to be photographed at different distances by moving along the optical axis;
wherein the first lens group and the second lens group are arranged in sequence from the object side to the imaging surface,
the second lens group has a negative refractive power, and
the first lens is a lens closest to the object side,
wherein the plurality of lenses with refractive power comprise a third lens, a fourth lens and a fifth lens, arranged in sequence from the object side to the imaging surface, and at least one of the third lens, the fourth lens or the fifth lens is movable, wherein:
the third lens has a negative refractive power, and comprises a concave image-side surface, the fourth lens has a positive refractive power, and comprises a concave object-side surface and a convex image-side surface, and the fifth lens has a negative refractive power, and comprises a concave object-side surface; or
the third lens has a positive refractive power, the fourth lens has a negative refractive power, and comprises a concave image-side surface, and the fifth lens has a positive refractive power, and comprises a convex object-side surface.
2. The optical imaging module according to claim 1 , further comprising:
an aperture diaphragm, located between the second lens and the second lens group, and configured to define an aperture of a central chief ray,
wherein a relationship between a distance L s from the aperture diaphragm to the imaging surface and a distance TTL from the first lens to the imaging surface is:
L s /TTL< 0.9.
3. The optical imaging module according to claim 1 , further comprising:
a field diaphragm, located at an object side of the first lens and configured to limit an incident amount of marginal rays.
4. The optical imaging module according to claim 1 , wherein
an Abbe number Vd1 of the first lens is greater than 30; and
an Abbe number Vd2 of the second lens is less than 40.
5. The optical imaging module according to claim 1 , wherein a relationship between an overall focal length f of the optical imaging module and a focal length f 1 of the first lens is: 2<f/f 1 <10.
6. The optical imaging module according to claim 1 , wherein a relationship between IH that is a half of a diagonal length of an effective sensing area of the imaging surface and a distance TTL from the first lens to the imaging surface is: 2.2<TTL/IH<10.
7. The optical imaging module according to claim 1 , wherein the second lens group comprises a plurality of movable lenses, and a relationship between an overall focal length f of the optical imaging module and a combined focal length f m of the plurality of movable lenses is: 0.1<|f m /f|<3.
8. The optical imaging module according to claim 1 , wherein the optical imaging module meets at least one of following relationships:
a relationship between a focal length f 1 of the first lens and a focal length f 3 of the third lens is: 1<|f 3 /f 1 |<5;
a relationship between an overall focal length f of the optical imaging module and the focal length f 3 of the third lens is: 0.5<|f/f 3 |<3;
a relationship between the overall focal length f of the optical imaging module and a focal length f 4 of the fourth lens is: 0<|f/f 4 |<6; or,
a relationship between the overall focal length f of the optical imaging module and a focal length f 5 of the fifth lens is: 0<|f/f 5 |<5.
9. The optical imaging module according to claim 1 , wherein a relationship between a radius of curvature R 1 of the object-side surface of the first lens and a radius of curvature R 2 of the image-side surface of the first lens is: −5<R 1 /R 2 <0.
10. The optical imaging module according to claim 1 , wherein a relationship between a radius of curvature R 3 of an object-side surface of the second lens and a radius of curvature R 4 of an image-side surface of the second lens is: −10<(R 2 +R 4 )/(R 2 −R 4 )<5.
11. The optical imaging module according to claim 1 , wherein a relationship between a radius of curvature R 5 of an object-side surface of the third lens and a radius of curvature R 6 of an image-side surface of the third lens is: 1<|f/|R 5 +f/|R 6 |<15;
wherein f is an overall focal length of the optical imaging module.
12. The optical imaging module according to claim 1 , wherein a relationship between a radius of curvature R 7 of an object-side surface of the fourth lens and a radius of curvature R 8 of an image-side surface of the fourth lens is: −2<R 7 /R 8 <10.
13. The optical imaging module according to claim 1 , wherein a relationship between a distance T d from a vertex of the object-side surface of the first lens to a vertex of an image-side surface of the fifth lens and a distance TTL from the vertex of the object-side surface of the first lens to the imaging surface is: 0.4<T d /TTL<1.
14. The optical imaging module according to claim 1 , wherein the fifth lens has a refractive index N5 less than 1.8.
15. The optical imaging module according to claim 1 , wherein a relationship between an overall focal length f of the optical imaging module and an incident pupil diameter D enp of the optical imaging module is: f/D enp >2.
16. An optical imaging device, comprising the optical imaging module according to claim 1 , wherein an image sensor component is disposed at an imaging surface of the optical imaging module.
17. An electronic device, comprising the optical imaging device of claim 16 .