What is the relationship between diopter and magnification of a magnifying lens?
Diopter refers to the curvature of the lens. As the diopter increases, the lens become thicker and the curvature greater. As the curvature increases, light rays are redirected to fill a greater portion of the viewer’s retina which makes the object look bigger. Powers refers to how much larger an object is made to look through a magnifying lens. Power is typically indicated by an X such 2X or 4X. There is more than one formula to converts the diopter of a lens into its power, we as a company use the common formula: Magnification = (Diopter / 4) +1
For example an 3 diopter lens makes an object look 75% times larger, over and above what the unaided eye already sees.
As you increase the magnification the lens size effectively decreases. It is not possible to get a high power lens in a large diameter. Opticical combinations are a compromise for the “ideal” magnifier.
We have tabulated a guide for magnification levels,as compared to Diopter:2Diopter=1.50x Mag 3 Diopter = 1.75x Mag 4 Diopter = 2.00x Mag 5 Diopter = 2.25x Mag 7 Diopter = 2.75x Mag 8 Diopter = 3.00x Mag 9 DIOPTER = 3.25x Mag 11 Diopter = 3.75x Mag 13 Diopter = 4.25x Mag 16 Diopter = 5.00x Mag 18 Diopter = 5.50x Mag 20 Diopter = 6.00x MAG
Here is an example, if a lens has diopter +3, its magnification is 3/4 + 1=1.75, and a lens of +4 diopter has magnification 4/4 + 1 = 2. By this way, you can easily calculate the magnification power of a lens from its diopter.
What Does 3x Magnification Mean? (Magnifier: 8 Diopter = 3.00x Mag)
One Step Deeper into Magnification and Crunching the Numbers:
As you climb in magnification power, you will lose viewing area but get more pinpointed detail at a closer range. Usually, if your vision is severely damaged, higher magnification powers could help immensely. We still always recommend speaking to a professional and allowing them to answer your questions and concerns and support you through the process of finding the best magnification level for you.
Here's some 3x lighted handheld magnifiers:
3X Rectangular Handheld Magnifier : Ultra bright LED was added to 10. The switch was upgraded to dimmable switch, which means users can adjust the brightness by rolling his/her finger gradually.
3X Rechargeable LED Page Magnifier with 12 Dimmable LEDs : 3 times LED black frame book magnifier with 12 LED lights, adjustable knob, users are no longer limited by fixed brightness, you can adjust the brightness according to the use conditions, environmental needs, personal preferences, etc.
3X Magnifier Illuminated Handheld Magnifying Glass With Lamp Stand : The illuminated magnifier lighted with ultra bright LED light ,even in the dark the brightness is adujstable by the dimmable switch ,readers still can use it easily and without any burdan.
Magnifier: 4 Diopter = 2.00x Mag
Types of Fresnel lens : positive Fresnel lens, negative Fresnel lens, Fresnel lens array, cylindrical Fresnel lens, circular Fresnel lens, linear Fresnel lens, lenticular Fresnel lens, diffraction Fresnel, Fresnel reflection, Fresnel beamsplitter and Fresnel prism.
The Fresnel lens can be designed and manufactured in very large sizes with light weight due to less than 4mm thickness, so the cost will be lower than traditional magnifiers. ln contrast, a conventional glass lens would be 200mm thick at the edge, weigh over 50kgs and cost thousand of dollars.
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