1, classified by appearance
It can be divided into portable magnifying glass and desktop magnifying glass.
2, according to the use of population classification
It can be divided into reading magnifying glasses for the elderly, children's magnifying glasses, outdoor portable magnifying glasses and professional appraisal measuring magnifying glasses.
Use of magnifying glass
1. Inspection, processing, installation and maintenance of various operations in the electronic industry.
2, facial skin, pore observation, manicure, ear digging, etc. In the beauty industry.
3. Sculpture and art appreciation.
4. Inspection and repair of cameras, clocks, etc.
5, people usually use it when reading, especially suitable for the elderly, students and so on to read in dim light.
6. Dentist, tailor, embroidery, etc.
7, finance, taxation, stamp collecting, jewelry, printing, agriculture and other product functions.
How to measure the magnification of magnifying glass
Method one
Put the magnifying glass on the paper with grids, and count the number of grids within the scope of the magnifying glass (a), then lift the magnifying glass until the grids are enlarged to the maximum and clearest, and count the number of grids within the scope of the magnifying glass (b). A divided by b is the magnification of the magnifying glass.
Method 2
Measure the side length of the grid with a ruler (a), then lift the magnifying glass until the grid is enlarged to the maximum and clearest, and put the ruler on the magnifying glass to measure the side length of the enlarged grid (b). B divided by a is the magnification of the magnifying glass.