The magnifying glass consists of a lens and a handle. The lens of a magnifying glass is a convex lens. The convex lens has the function of magnifying the image of the object, and is a whole transparent or semi-transparent object. The refracting surface is two spherical surfaces, or one spherical surface and one flat surface. The magnifying glass lens is characterized by being transparent and thicker (convex) in the middle. Observe the object with a magnifying glass to see more details. The magnifying glass lens is characterized by a thick middle and a thin edge. It feels very smooth and does not feel uneven. Usually surrounded by materials.
High magnification magnifying glass, as the name suggests, is of course relative to low magnification magnifying glass. Most of the magnifying glass used in our daily life are low magnification magnifying glass. We generally use them to assist in reading and fill up the defects of our eyes when reading. Magnifying glass (English name: magnifier): It is a simple visual optical device used to observe the details of the object. It is a convergent lens with a focal length much smaller than the photopic distance of the eye.
The magnifying glass multiple distinction:
(1) 2-5 times: low magnification magnifying glass, magnifying glass in this magnification range is very common, it is the magnifying glass multiplier used in our daily life, and it is most used to assist reading and browsing. The magnifications of this kind of magnifying glass are relatively small, and most of them are concentrated between 2 and 3 times. Using biconvex lenses, its lens area is relatively large, which can meet the magnification needs of most people. Industry application requirements: watches, jewelry, antiques, electronics/semiconductors, medical, etc.
(2) 6-12 times: medium magnification magnifying glass, this kind of magnifying glass is a bit particular, if it is an ordinary double convex magnifying glass, the lens area is generally relatively small (this is limited by optical principles), if you want to make the area larger For these, aspheric lens technology must be used, but in this way, the overall cost of the magnifying glass is much higher. Daily applications: old people reading newspapers, daily observations, etc.; industry applications: textile/cloth repair, jewelry, antiques, electronics/semiconductors, micro-carving, medical treatment, etc.
(3) 15 times or more: high magnification magnifying glass, high magnification magnifying glass is generally not used for reading, but used for detailed inspection of the surface of various materials, such as textiles, wood, minerals, coatings and dyed surfaces, as well as calligraphy and painting Identification is also used for the diagnosis and evaluation of material surface defects. In the industrial field, it is often used for the inspection of surface structure, but also for surface repair, personal hobbies, education and scientific research. Due to the large magnification of this type of magnifying glass, the eyes need to be close to the lens when using it. Among them, watch repairs and jewelry magnifiers should be used directly with the eye cup stuck on the eye, and then move the target to adjust the distance until the vision is clearest.
