The origin of the magnifying glass
A magnifier is used to enlarge the convex lens of the object, the prototype of the microscope.
History
Basically, there is no clear information is displayed when the invention of the magnifying glass, but certainly no later than the thirteenth century invention.
As early as more than a thousand years ago, people had polished clear crystals or precious stones into "lenses" that magnified the images.
Glasses
may also be considered a magnifying glass. There are rumors that this masterpiece was invented by some people at the end of the 13th century.
An unknown craftsman in China.
In 1260, Marco Bros. once described Chinese old people reading glasses as they read characters.
Large oval shape, crystal stone, quartz, topaz, amethyst milled into a lens, and set in the turtle shell for the frame, a temple with a copper pin stuck on the horns, two string tied to the ear, three The temple is fixed on the hat.
Cost is not expensive, the status of the status of the symbol, there was a homesick with a horse for a pair of glasses.
Alessandro di Spina, Dos Ghani, Italy.
The highly transparent lenses made in Venice and Nuremberg have been famous in Europe.
It's just a magnifying glass. It's only when you read it.
British scholar Roger Bacon.
Construction
is divided into two parts: a lens, mirror handle.
Lens
a single piece of transparent or translucent objects.
The mirror is semi-arcuate.
It feels very smooth and not bumpy.
It is usually surrounded by material.
Mirror handle
attached to the lens.
Looks like there is no model limit, the most common is columnar.
Use
an enlarged image of an object.
The main function of the magnifying glass.
The magnifier is placed at a suitable distance from the object to view the magnified image from within the lens.
Notice that the object has not actually been enlarged.
Focus on fire .
Secondary features.
Under strong light, the focal point of the lens will be particularly fierce, and the focal point will zoom or catch fire.
Be aware that the magnifying glass does not enlarge the angle.
Production of raw materials
lens
most important or glass, is in line with economic principles, cheap and beautiful, a good choice for business people.
Some of the more precious are rare minerals such as rubies, agates, crystals, etc.
More alternative and creative can be: water, ....
Mirror handle
this everything possible, as long as want to come to solid objects, almost all can be used as raw material mirror handle, such as:
glass, plastic, metal (gold, silver, copper, iron, tin ...... can, but the price is not a nothing, but some very expensive.) ,wooden, shell, cardboard, stone
If you have any questions or are interested in our other magnifying glass, please feel free to contact us!
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