Prime lens module, in-vehicle camera system, and camera module

An in-vehicle camera system, comprising a processor, a memory, an image sensor, and a prime lens module;

• from an object side to an imaging side thereof, the prime lens module comprising:
• a first lens having a negative focal power and a concave imaging side surface, the first lens being a meniscus spherical lens;
• a second lens having a negative focal power and two concave spherical surfaces;
• a third lens having a positive focal power and two convex spherical surfaces;
• 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 a biconvex aspheric lens or a biconvex spherical 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 expressions:
• 40<|V5−V6|<60;
• where V5 represents an Abbe number of the fifth lens;
• and
• V6 represents an Abbe number of the sixth lens.

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.