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

Claim 0:
1. A prime lens module, from an object side to an imaging side thereof, the prime lens module sequentially comprising:
a first lens with a negative focal power, the first lens being a meniscus spherical lens with a concave surface facing the imaging side;
a second lens with a negative focal power, the second lens being a biconcave spherical lens;
a third lens with a positive focal power, the third lens being a biconvex spherical lens or a meniscus spherical lens;
a fourth lens with a positive focal power, the fourth lens being a biconvex spherical lens or a biconvex aspheric lens;
a fifth lens with a positive focal power, the fifth lens being a biconvex spherical lens;
a sixth lens with a negative focal power, the sixth lens being a biconcave spherical lens; and
a seventh lens with 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, and the prime lens module satisfies the following expression:

6.5<TL/(f*tan θ)<7.9;

where TL represents an optical total length of the prime lens module;
f represents a focal length of the prime lens module; and
θ represents a half of FOV of the prime lens module.