Optical lens and imaging equipment

Abstract

Disclosed are an optical lens and an imaging device including the optical lens. The optical lens may sequentially include a first lens, a second lens, a third lens and a fourth lens along the optical axis from the object side to the image side. Wherein, the first lens can have negative refractive power, its object side is convex, and the image side is concave; the second lens can have positive refractive power, and its object side and image side are both convex; the third lens can have positive refractive power , the object side and the image side are both convex; and the fourth lens may have negative power, the object side is convex, the image side is concave, and the object side or the image side contains at least one inflection point. According to the optical lens of the present application, at least one of beneficial effects such as good imaging quality, good thermal compensation, large viewing angle, large clear aperture, high screen brightness, and miniaturization can be realized.

Description

technical field [0001] The present application relates to an optical lens and an imaging device including the optical lens, more particularly, the present application relates to an optical lens including four lenses and an imaging device. Background technique [0002] With the development of science and technology and the improvement of application requirements, optical lenses have been widely used in many fields, and the requirements for lens resolution are getting higher and higher; at the same time, with the improvement of equipment integration, the requirements for lens size are getting smaller and smaller . [0003] Ordinary small-sized lenses have poor resolution, and due to volume limitations, it is difficult to enlarge the aperture, so they cannot meet the normal use in low-light environments. [0004] In addition, in some harsh environments, for example, vehicle-mounted lenses need to be able to be used in low-temperature environments with severe ice and snow and h...

AI Technical Summary

Problems solved by technology

[0003] Ordinary small-sized lenses have poor resolution, and due to volume limitations, it is difficult to enlarge the aperture, so they cannot meet the normal use in low-light environments

[0004] In addition, in some harsh environments, for example, vehicle-mounted lenses need to be able to be used in low-temperature environments with severe ice and snow and high-temperature environments with direct sunlight. Due to the large temperature difference, the optical back focus of ordinary lenses will shift, affecting normal operation. use

In order to suppress the deviation of the optical back focus of the lens as the temperature changes, the traditional method is to use an expensive optical glass lens with a small thermal expansion coefficient, but this will greatly increase the cost of the lens, which is not conducive to mass production and use.

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