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2021
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The basic principle of optical lens
Author:
An optical lens is an optical element whose surface is a part of a spherical surface made of a transparent material. The lens of an optical lens consists of several lenses, including glass lenses and plastic lenses. Generally speaking, glass lenses are much more expensive than plastic lenses. The more optical lenses used in a camera, the higher the cost of the camera. Therefore, in general, the lens used for a camera with better quality should be a glass lens. Because its imaging effect is much better than plastic lenses, optical lenses can be used in many fields, such as art, medicine, transportation, military, astronomy and so on, playing a very important role. Then it will tell you the basic principle of optical lens.
So far, optical lens has been used in optical instruments, laser digital cameras, vehicles and security and other fields, and with the continuous development of the market, the application of optical lens technology is more and more extensive. Optical lenses are made according to the law of refraction of light. An optical lens made of a transparent material, such as crystal glass, is itself a refractor with a refractive surface consisting of two spherical surfaces or a spherical surface and a planar transparent body.
In the optical lens, the thin lens is an optical lens in which the thickness of the middle portion and the radius of curvature of both sides are relatively large. This camera is only equipped with a convex lens, also called a single lens. However, with the rapid development of science and technology, the current camera lens can be divided into a converging optical lens composed of a concave lens and a convex lens with different functions, also called a compound lens concave lens, which has the function of calibrating various phase differences.
The glass or plastic components used in optical lens lamps can change the direction of light or control the distribution of light. The optical lens is the basic optical element of the microscope optical system. The objective lens, eyepiece and condenser are all composed of a single lens or multiple lenses. According to its different shape, can be divided into convex lens (positive lens) and concave lens (negative lens) two categories.
When a beam of light parallel to the main optical axis intersects a point after passing through a convex lens, this point is called the "focal point", and the plane passing through the focal point and perpendicular to the optical axis is called the "focal plane". There are two focal points, the focal point in object space is called "object-side focal point", and the focal plane there is called "object-side focal plane"; conversely, the focal point in image space is called "image focal point", and the focal plane there is called "image focal plane". The light passes through the concave lens and becomes an upright virtual image, while the convex lens becomes an inverted real image. Real images can appear on the screen, but virtual images cannot.
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