Mirror is a kind of external lubrication, with the ability to reflect light. The most common mirror is the flat mirror, which is often used to clean up the appearance. In this way, it is easy for the masquerade to see some of the details. A kind of classification of mirror, mainly refers to the small mirror with exquisite shape and easy to carry. Other also refers to make-up with desktop mirror, also known as dressing mirror. The primary difference between a make-up mirror and a mirror is that both make-up mirrors have a magnifying surface of different proportions. Mirrors are divided into two types: plane mirror and curved mirror. Curved mirror can be divided into concave mirror and convex mirror. It is mainly used as dressing mirror, furniture accessories, as well as solar range, lamp and searchlight mirror, reflecting telescope, car rearview mirror, etc. Surface polished metal equipment with regular reflection function and glass or metal products coated with metal reflection film.

Working principle of cosmetic mirror

     When the parallel light is incident on the concave mirror and reflected, it converges to the focus (f), and the focus orientation is at 1 / 2 of the distance between the curvature base (c) and the mirror. If the cooker is placed in the focal position of the large concave mirror, it can be heated by the sunlight and become a solar cooker. If the light source in the lamp or searchlight is placed in the focus position of concave mirror, the light can reflect parallel light. An object outside the base of curvature can be reflected into an inverted solid image, such as a reflecting telescope. The reflection of the mirror on light obeys the law of reflection. The reflection ability depends on the viewpoint of the incident light, the lubrication degree of the mirror and the properties of the metal film. If you want to see your whole body length from the mirror, because the incident angle is equal to the reflection angle, the mirror must have at least half of its own length. The reflecting surface of concave mirror faces the curvature base. The reflecting surface of convex mirror is back to the curvature base, and the object becomes a reduced positive image behind the mirror, which can reflect a large range of reduced scenes, such as car rearview mirror. The imaginary line that is straight with the mirror is called the normal. The angle between the incoming ray and the normal is equal to the angle between the back ray and the normal. The object in front of the mirror becomes an upright virtual image behind the mirror, and the distance between the image and the mirror is the same as that between the object and the mirror.