Why The Lens of A Magnifying Glass Is A Convex Lens.

First I would introduce the principle of magnifier imaging

The object is placed in the focus, on the other side of the convex lens into an inverted real image, real image has shrunk, such as large, magnified three kinds. The smaller the object distance, the greater the real image. The object is placed in the focal point and the illusion is amplified at the same side of the convex lens. The larger the distance, the larger the illusion. Will not be imaged on the focus. In twice times the focal length will be equal to the big inverted real image.

What's the function of magnifying glass besides magnification?

The principle of a magnifying glass is when using a magnifier, the object is placed in the focal length, and the illusion of the object is magnified by the convex lens. Everyone knows that magnifying glass can magnify the detail things especially for the elderly. Magnifier makes part or all of your screen bigger so you can see words and images better. With the different magnification lenses you can adjust the best vision and look more clearly. Magnifier also commonly used in works. For instance jeweler may use the magnifier to identify the jewels, the electronic engineer use the magnifier to fix the board and the field expert can use it to observe the plant and insect. 

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Why the magnifier made round?

The optical aids are based on the principle of reflection, refraction and diffraction of optics. Secondary vision equipment with concave and convex mirrors or lens enlargement images can be provided depending on the needs of seeing or seeing. Such auxiliary equipment can be divided into three categories.

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Where can see Fresnel lenses?

The design allows the construction of lenses of large aperture and short focal length without the mass and volume of material that would be required by a lens of conventional design.

The Fresnel lens design allows for significant reductions in lens thickness (as well as weight and volume) but at the expense of reduced image quality, which is why sophisticated imaging equipment such as monocular cameras and digital cameras still use traditional heavy lenses.

Why a lower magnification power is large lens?

Magnification is the process of enlarging an object in visual size, normally through an optical lens.

To see the details of a tiny object or object, it is necessary to move the object closer to the eye, so that the angle of view can be enlarged to form a larger real image on the retina. But when the object is too close to the eye, it cannot be seen clearly.

Magnification is also an important parameter of the magnifier, but can not blindly believe that the higher the magnification isbetter, the choice should first consider the numerical aperture ofthe objective lens.

Magnifier light magnification X and D relationship?

Magnifiers and magnifier lamps are mostly made of glass and acrylic glass.

1/ The glass features

• Wear resistance：high hardness, not easy to scratch the surface, long-term maintenance of a clear mirror.
• High light transmission：It is not easy to contaminate the dust and check the objects more clearly.
• Low glare：Long-term use is not easy to fatigue, difficult to produce dizziness

Advantages of Fresnel lens

1.      Fresnel lens controllableangle of light output is strong 

Fresnel lens can control direction of light more accurate than traditional LED lens. Traditional LED lens is hard to control angle of light because its design and processing error. However Fresnel lens can do this to meet the needs of different customers for different purposes.

What is Fresnel lens? What is its effect?

Fresnel lens is a kind of widely used optical element. Its design and manufacture are designed into several technical fields, including optical engineering, macromolecule material engineering, CNC machining, diamond turning process, nickel plating process; molding, injection molding, casting And other manufacturing processes.

The Fresnel lens was invented by the French physicist Augustin Fresnel. He originally used this type of lens in 1822 to create a glass Fresnel lens system - a lighthouse lens. It is a finely-structured optical element that looks like a dart plate from the front and consists of a ring and a concentric circle.

                                                                    Fresnel lens front view

Where is the difference between reading glasses and magnifying glass?

➤Is reading glasses and magnifier the same lens? What are the similarities and differences between the two? Can I use the magnifying glass as a reading glasses directly on my eyes? 

In the first picture, a grandfather with reading glasses holding a magnifying glass is reading the newspaper with relish. This picture of great significance in life seems to be using facts to describe the relationship between the two.

                                                  Figure 1                                      Figure 2

How to pick a magnifying glass?

The indispensable magnifier in the life of the elders, in fact, must choose different magnifications according to different uses, but most people don’t’t know how to choose. We make up a few points for everyone below, hope it’s useful for you!