Diameter 50Mm Fresnel Lens Diy Tv Projection Solar Cooker,focal Length 28Mm, Thickness2Mm,high Light … #3928-James

$ 5.00

Product Description Fresnel lenses are molded from precision optical-grade acrylic.The surface of a Fresnel lens is molded into many circular,concentric ridges.These circular …

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diameter 50mm fresnel lens diy tv projection solar cooker,focal length 28mm, thickness2mm,high light condenser

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Product Description                                                                                                          

 50-28

 

 

Fresnel lenses are molded from precision optical-grade acrylic.The surface of a Fresnel lens is molded into many circular,concentric ridges.These circular ridges give the Fresnel lens a zigzag or sawtooth cross-section.Each sawtooth creates a tiny prism.Fresnel lenses are a compromise between efficiency and image quality.High groove density allows higher quality images.while low groove density yields better efficiency.By choosing appropriate powers for these prisms,designers can define the focal length and control image quality

LED magnifier, fresnel lens solar energy, rear projection fresnel screen,fresnel solar concentrator,fresnel magnifier,camera fresnel spotlight and so on.

The Fresnel lens is simple introduction                                                                          

1

As early as the 18th century (1748), it is found that the traditional energy refraction lens only occurred on the surface and remove as much of the middle part, and retain the surface curvature, formed a thin flat lens, can still maintain good energy transmittance.

Fresnel lens to form a thin flat lens, its profile look like a sawtooth shape, but in fact every adjacent blade Angle is constantly changing, the Angle of the change is in order to focus light converge to the same place.

Classification of Fresnel lens:

According to its focus in different shapes, can be divided into point focusing Fresnel lens and line focus Fresnel lens.

Point focusing Fresnel lens:

Look from the front like a dart set, is composed of a ring a ring concentric circles:

Linear Fresnel lens is relative to the point of focus in terms of Fresnel lens, its positive shape look like shutter, look from the profile, Is also the point of changing the sawtooth shape, unlike disc Fresnel lens, this lens focus light to form a straight line:

Fresnel lenses are most often used in light gathering applications,such as condenser systems or emitter/detector setups. Fresnel lenses can also be used as magnifiers or projection lenses.This Lens is also great for the fine print in books, magazines,maps,telephone directories,recipes,etc. This can really be a great and creative gift to children as a toy and senior people who need visual aid.

The  following announce is suitable for all the customers .

Before purchase your order  , Please take one minutes to read below regulation  .

It will help us a lot to make the business more easy and goes smooth :

 

1. About shipping                                                                                                                                               

A DHL :2-7 days 

B Singapore EMS :15-45 days 
C Singapore post air post :20-60 days
If your country need through other transportation to send the goods, Please contact us to help you solve the transportation problem.
According to the regulations of the Russian post office, all Russian buyers must provide full name was able to pick up package.
If you are Russian customers, please provide your full name, thank you for your cooperation.

 

2.About Payment                                                                                                                                                

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3. About warranty And after-sale service                                                                                                     

We  will give our customer a best after-sale service , So we will offer one year warranty for most of our products and professional technical support .

If you have any question for your test ,please contact me ,Skype is :sara.lxy

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Additional Information

Usage

Optical

Model Number

MY28

Structure

A

Material

PMMA

Shape

circle