Camera lens assembly and portable electronic device
Provided are a camera lens assembly and a portable electronic device. The camera lens assembly includes first, second, third, fourth, fifth and sixth lenses from an object side to an image side. The first lens has a positive focal power and a convex object side surface. The second lens has a focal power and a symmetrically-transitional image side surface from concave to convex along a direction vertical to an optical axis, in which the image side surface is concave close to the optical axis and convex away from the optical axis. The third lens has a focal power and a convex object side surface. The fourth lens has a positive focal power and a convex image side surface. The fifth lens is of a focal power. The sixth lens has a negative focal power, a convex object side surface and a concave image side surface.
1. A camera lens assembly, comprising:
a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side of the camera lens assembly to an image side of the camera lens assembly in turn, wherein:
the first lens is of a positive focal power, an object side surface of the first lens is convex;
the second lens is of a focal power, an image side surface of the second lens is a symmetrically-transitional surface from concave to convex along a direction vertical to an optical axis, wherein the image side surface of the second lens is concave close to the optical axis and convex away from the optical axis;
the third lens is of a focal power, an object side surface of the third lens is convex;
the fourth lens is of a positive focal power, an image side surface of the fourth lens is convex;
the fifth lens is of a focal power, and
the sixth lens is of a negative focal power, an object side surface of the sixth lens is convex and an image side surface of the sixth lens is concave;
the camera lens assembly meets the following formula:
f 4 /CT 4<2.5,
wherein f 4 represents an effective focal length of the fourth lens, and
CT 4 is a thickness of the fourth lens along the optical axis.
2. The camera lens assembly according to claim 1 , wherein the camera lens assembly meets the following formula:
0.15< CT 4 /TTL <0.3,
wherein CT 4 is a thickness of the fourth lens along the optical axis, and
TTL is a total length of the camera lens assembly.
3. The camera lens assembly according to claim 1 , wherein the camera lens assembly meets the following formula:
TAN( HFOV )/ TTL≥ 0.28mm −1 ,
wherein HFOV is half of a maximal field angle of the camera lens assembly, and
TTL is a total length of the camera lens assembly.
4. The camera lens assembly according to claim 1 , wherein the camera lens assembly meets the following formula:
−1< f 4 /f 6<−0.2,
wherein f 6 represents an effective focal length of the sixth lens.
5. The camera lens assembly according to claim 1 , wherein the camera lens assembly meets the following formula:
CT 3 /CT 4<0.6,
wherein CT 3 is a thickness of the third lens along the optical axis, and
CT 4 is a thickness of the fourth lens along the optical axis.
6. The camera lens assembly according to claim 1 , wherein the camera lens assembly meets the following formula:
0.35< f/f 1<0.9,
wherein f represents an effective focal length of the camera lens assembly, and
f 1 represents an effective focal length of the first lens.
7. The camera lens assembly according to claim 1 , wherein the camera lens assembly meets the following formula:
0.45< R 1 /R 5<1.10,
wherein R 1 represents a curvature radius of the object side surface of the first lens, and
R 5 represents a curvature radius of the object side surface of the third lens.
8. The camera lens assembly according to claim 1 , wherein the camera lens assembly meets the following formula:
TTL/ImgH< 1.6,
wherein TTL is a total length of the camera lens assembly, and
ImgH equals to half of a diagonal of an effective pixel region at an imaging side surface of the camera lens assembly.
9. The camera lens assembly according to claim 1 , wherein the camera lens assembly meets the following formula:
( T 12+ T 23)/ TTL< 0.1,
wherein T 12 is a spacing distance between the first lens and the second lens along the optical axis,
T 23 is a spacing distance between the second lens and the third lens along the optical axis, and
TTL is a total length of the camera lens assembly.
10. A portable electronic device, comprising:
an imaging device comprising a camera lens assembly configured to form an image, the camera lens assembly comprising:
a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side of the camera lens assembly to an image side of the camera lens assembly in turn, wherein:
the first lens is of a positive focal power, an object side surface of the first lens is convex;
the second lens is of a focal power, an image side surface of the second lens is a symmetrically-transitional surface from concave to convex along a direction vertical to an optical axis, wherein the image side surface of the second lens is concave close to the optical axis and convex away from the optical axis;
the third lens is of a focal power, an object side surface of the third lens is convex;
the fourth lens is of a positive focal power, an image side surface of the fourth lens is convex;
the fifth lens is of a focal power, and
the sixth lens is of a negative focal power, an object side surface of the sixth lens is convex and an image side surface of the sixth lens is concave;
the camera lens assembly meets the following formula:
f 4 /CT 4<2.5,
wherein f 4 represents an effective focal length of the fourth lens, and
CT 4 is a thickness of the fourth lens along the optical axis,
a projecting device configured to project, and
a controlling device configured to control the imaging device and the projecting device.
11. The portable electronic device according to claim 10 , further comprising a pair of multimedia glasses comprising a bracket and a frame, wherein
the controlling device is arranged on the bracket,
the imaging device is arranged on the frame facing forward, and configured to take a scene in front of a user, and
the projecting device is arranged on the frame facing backward, and configured to project the image on eyes of the user.