The application of convex lens in life

The Convex Lens is made according to the principle of light refraction. It has a unique shape. The thickness of the middle part is much thicker than that of the edge part. Compared with the concave lens, it is not only the opposite in appearance, but also has two focal lengths at one focal length. It can distinguish between the real and the real in the room, the size of the object can be distinguished at the double focal length, and it also has the characteristic of concentrating light.

As the most common item in life, convex lens is widely used in various fields of life, and it brings great convenience to our lives.

Convex lens in the glasses

In the modern life of the economic high-speed Karma station, while people enjoy the convenience brought by high technology, they also bring some harm to our body. Glasses are one of them. We will find that glasses have become life today. A daily necessities that can be seen everywhere in China. In the face of work, entertainment, and age, our eyes are often overwhelmed and have varying degrees of damage, but due to different reasons, the use of glasses will be different. From the perspective of the type of cause, the eyes can be divided into myopia. Unlike hyperopia, myopia needs a Concave Lens, while hyperopia needs a convex lens; depending on the degree of damage, there will be different degrees, which correspond to lenses of different thicknesses.

According to the needs of real life, the convex lens used by the hyperopic eye shrinks into a positively magnified image. It maps the selected objects to the retina of the observer's eyeball through the refraction of the convex lens, so that patients with presbyopia can clearly observe distant objects.

Convex lens in microscope

In order to be able to observe the appearance of objects beyond the scope of the naked eye, people will use a high-power microscope to observe and record. The function of the microscope is to magnify objects. Microscopes with different magnifications will observe objects of different sizes. From the first microscope developed by Galileo to the current digital microscope, advances in science and technology have overcome the bottleneck of microscope magnification. Observed objects can reach the limit, Chengdu, which provides scientists with a key tool for studying the miniature world, and provides a key to the study of the miniature world.

As a key component of the microscope, the convex lens is installed on the side close to the object and the side close to the eye in the microscope. They are named objective lens and eyepiece respectively. The principle is also the magnification characteristic of the convex lens. When the observing object is fixed at the center of the stage, due to the small focal length of the objective lens, the observing object is between one and two times the focal length of the eyepiece, and the object becomes an upside-down magnified virtual image, and the virtual image is just within the focal length of the eyepiece. , The eyepiece continues to upside-down magnification of the virtual image. After two upside-down magnifications, the observation object on the stage has been magnified forward, and the outer contour of the object can be clearly observed.

Convex lens in magnifying glass

With the development of economy, simple magnifying glass has been gradually replaced by high-tech electronic magnifying glass, and gradually become intelligent, so that magnifying glass can perfectly meet people's needs. But whether it is an electronic magnifying glass or the most common magnifying glass, the key component used is still a convex lens, and the principle of a convex lens is naturally applicable to all magnifying glasses. A magnifying glass is a widely used tool in real life. It can magnify small objects, but due to its short focal length, it can only magnify things within a limited distance. And this distance is generally less than one focal length, and the enlarged image is an upright enlarged virtual image. As the distance between the magnifying glass and the object is closer, the magnification effect is better. The reason is that the distance is smaller than the focal length of the magnifying glass when viewed at close range. On the contrary, the farther the magnifying glass is from the object, the worse the magnification effect will be. In some industries, in order to be able to clearly observe the surface condition of small objects, such as observing small parts of circuit boards, jewelry identification, observing small fonts, and dentists detecting tooth problems.

Convex lens in projector

Projectors have become necessary items for major companies, corporate governments, education, catering and other industries. In order to be able to magnify the items that everyone pays attention to for many people to watch, people often choose to use a projector. The principle of the projector is to place the object between one and two times the focal length of the convex lens, and the convex lens can be one to two times. The inverted virtual image can be magnified between multiple focal lengths, and then the inverted virtual image is reflected into an upright virtual image and projected on the screen by using the reflection principle of the plane Mirror to achieve the purpose of magnification. In order to achieve the most ideal projection effect, because the stage is fixed, the convex lens can only be moved to change the distance between the convex lens and the object, thereby improving the projection effect. Within the distance of one to two times the focal length, the closer the convex lens is to the stage, the more obvious the magnification effect will be. Conversely, the longer the distance, the worse the magnification effect will be.

Convex lens has the function of being able to magnify and is used in various industries in real life. In order to show you the wide applicability of Convex Lenses, this article has different focal length angles based on the thickness of convex lenses, and summarizes the three applications of convex lenses in life, namely the applications in hyperopia glasses, microscopes, and magnifiers.