1, magnifying glass has the function of magnifying and focusing. With a magnifying glass, you can not only see the image of the object, but also see the enlarged image of the object.
2. The lens of a magnifying glass is basically a convex lens, and both sides are spherical. At present, a few magnifying glasses are aspheric mirrors, that is to say, one side is flat and the other side is convex. In addition, the mirror is composed of inclined planes.
I am not good at language organization. Excuse me, let me introduce you to the magnifying glass:
Optical products. Magnifier
First, the historical development of magnifying glass
When the magnifying glass was invented, there is basically no clear information, but it is certain that it was invented no later than the end of the thirteenth century.
As early as thousands of years ago, people have ground transparent crystals or gems into "lenses", which can enlarge images.
Second, the structure of the magnifying glass
It is divided into two parts: lens and lens handle.
Third, the magnifying glass principle
A magnifying glass is a convex lens with a thick center and a thin edge. Usually a transparent medium. When the light passes through, it will be refracted, making the light converge to the middle.
When observing an object with a magnifying glass, the object is placed under the magnifying glass and the eyes are above the magnifying glass. When the light of an object passes through, it will be refracted, which will make the light converge to the middle and enter people's eyes.
The size of the object imaged on the human retina is directly proportional to the angle (viewing angle) from the object to the eye. The larger the viewing angle, the larger the image, and the more you can distinguish the details of the object.
Fourth, the purpose of magnifying glass.
1, enlarge the object image.
The main function of magnifying glass. For example, reading books, newspapers and maps.
Put the magnifying glass in front of the object at an appropriate distance and watch the enlarged image from the lens.
Please note that this object is not actually enlarged.
2. Concentrate fire.
Secondary function.
Under strong light, the focal part of the lens will be particularly bright, and the focal part will zoom or catch fire.
5. What can't a magnifying glass enlarge?
Can't enlarge the angle.
Six, the type of magnifying glass:
Fuan Kang Reading Magnifier, Children Magnifier, Senior Magnifier, Watch Electronic Magnifier, Jewelry Magnifier, Graphic Photography Magnifier, Pocket Portable Magnifier, Business Card Magnifier.
For more details, please visit Vidas Magnifier official website.
Seven, magnifying glass raw materials
camera lens
The most important thing is glass, which is very economical, cheap and beautiful. It is a good choice for businessmen.
More valuable may be rare minerals, such as rubies, agates and crystals.
More alternative and creative can be: water, ...
Mirror handle
As long as it is a solid object, it can almost be used as the raw material of the lens handle, such as:
glass
plastic cement
Metals (gold, silver, copper, iron, tin, etc. ) are acceptable, but the prices are different, but some of them are extremely expensive. )
wood
shell
Hard paper
Si Tong Borg
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