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!