Patent ID: 11906814
Assignee: JIANGXI LIANCHUANG ELECTRONIC CO., LTD.
Field: Optics (Instruments)
Classification: CPC G  B | IPC B  G

Claim 16:
17. A camera module, comprising a casing, a barrel connected to the casing, and a prime lens module disposed in the barrel; wherein from an object side to an imaging side thereof, the prime lens module comprises:
a first lens having a negative focal power and a concave surface facing the imaging side;
a second lens having a negative focal power and two concave spherical surfaces;
a third lens having a positive focal power, the third lens being a biconvex spherical lens or a meniscus spherical lens;
a fourth lens having a positive focal power, the fourth lens being a biconvex spherical lens or a biconvex aspheric lens;
a fifth lens having a positive focal power and two convex spherical surfaces;
a sixth lens having a negative focal power and two concave spherical surfaces; and
a seventh lens having a positive focal power, the seventh lens being selected from a group consisting of a biconvex aspheric lens, a biconvex spherical lens, and a meniscus aspheric lens;
wherein the second lens and the third lens are bonded together through optical glue; the fifth lens and the sixth lens are bonded through optical glue; one of the fourth lens and the seventh lens is a spherical lens while the other is an aspheric lens; wherein the prime lens module satisfies the following expression:

0.7<|f2/f3|<0.9;

where f2 represents a focal length of the second lens; and
f3 represents a focal length of the third lens;
wherein the fourth lens is a biconvex spherical lens, and the seventh lens is a meniscus aspheric lens with a concave surface facing the object side.