A magnifying glass is a convex lens used to magnify objects, the prototype of a microscope. It is usually used to observe the details of objects. Magnifying glasses are converging lenses with a much smaller focal length than the photopic distance of the eye. Magnifying glasses can be classified according to appearance, which can be divided into portable magnifying glasses, glasses-type magnifying glasses and vertical magnifying glasses. According to the classification of user groups, it can be divided into reading magnifying glass for the elderly, magnifying glass for children, outdoor portable magnifying glass, professional identification measurement magnifying glass and medical magnifying glass.
Desktop magnifying glass can be fixed, there is a base below, a magnifying glass above, the shape of the magnifying glass can be rectangular or square, or round, such a magnifying glass is mainly used for long-term fixed viewing of a place. Desktop magnifiers can have long arms and bent places, and can be changed at will according to needs. Portable magnifying glass is like above, a round magnifying glass in front of a handle, there are many types of portable magnifying glass, some magnifying glass is square, rectangular or round, there are also magnifying glass or folding magnifying glass that can be combined, such a magnifying glass is mainly easy to tie and carry, easy to observe.
Portable magnifiers are also available with and without light sources, and there are many benefits when viewing with light magnifiers. 1. Handheld magnifying glass Handheld magnifying glass is small and lightweight, cheap, easy to carry, and has strong applicability. There are many types of handheld magnifying glasses, which are round and square in shape; From the structure, there are handle type, folding type and built-in light source type.