The role of optical lens and the law of imaging, we should know a lot about glass lens, the lens on the mobile phone camera, camera lens, etc. The lens is an optical element made of transparent material and the surface is part of the spherical surface. The lens is composed of several lenses. It is composed of two types: plastic lens and glass lens. The lens is an optical element made of transparent materials (such as glass, crystal, etc.), which affects the curvature of the wavefront of light. It is a device that can converge or disperse light, and the resulting images have real and virtual images. It is widely used in various fields such as security, car wearing, digital camera, laser, optical instrument and so on. Let's take a look at the role of optical lenses together.

The role of optical lens

Lens can be widely used in various fields such as security, car wear, digital cameras, lasers, optical instruments, etc. With the continuous development of the market, lens technology is more and more widely used. (Lens) The lens is made according to the law of light refraction. A lens is an optical element made of transparent materials (such as glass, crystal, etc.). The lens is a refracting lens, and its refractive surface is a transparent body with two spherical surfaces (part of the spherical surface), or one spherical surface (part of the spherical surface) and one plane. The images it forms have real and virtual images. Convex lens: thick in the middle, thin at the edge, there are three kinds of biconvex, plano-convex, and concave-convex; Concave lens: thin in the middle and thick at the edge, there are three kinds of biconcave, plano-concave, and convex-concave.

6. As mentioned in Article 5, because the lens bulb is boosted to 23000V by the ballast, it is used to stimulate the xenon to reach high brightness at the moment when the power is turned on, so it can maintain 3 to 3 to 3 to 3 times even when the power is cut off. Brightness of 4 seconds. This will enable you to prepare for parking in advance and avoid disasters. This is not possible with traditional halogen lamps.

can be divided into convex lens and concave lens, among which the thick side lens is called concave lens, the middle edge thick lens is called convex lens. The convex lens converges the light, and the concave lens diverges the light. If subdivided, there are plano-convex lenses, bi-concave lenses, crescent lenses, objective lenses, eyepieces, etc., various lenses that we often see in our lives, there are multiple lenses combined to achieve corresponding optical functions, such as lasers The focusing lens in the equipment, the collimating lens is the function of collimating and focusing by putting two to three lenses in a mirror copper.

1. The lens is represented by the lens symbol (a line segment has two V-shaped signs at both ends), the main optical axis is drawn, the optical center, and the focal point are marked according to the two refracted rays of the three special rays of the lens (usually made light The intersection point of the central light and the light parallel to the main optical axis is better, and the characteristics of the image formed by the lens (such as virtual reality, size, front and back, etc.) can be obtained.

3. Convex lens imaging law:

(2) Conjugate imaging means that the size of the object distance and the image distance can be interchanged. In the two cases, it becomes an enlarged and reduced inverted real image.

4. Looking through a convex lens at a timepiece beyond the double focal length, the image of the second hand still rotates clockwise, because at this time it is an inverted real image, which is still the normal direction when viewed backwards, so it still rotates clockwise.

The lens is represented by the lens symbol (a line segment has two V-shaped signs at both ends), the main optical axis is drawn, the optical center, and the focal point are marked according to the two refracted rays of the three special rays of the lens (usually the one that has passed the optical center). The intersection of the light and the light parallel to the main optical axis is better, and the characteristics of the image formed by the lens (such as virtual reality, size, front and back, etc.) can be obtained.