Fresnel Lens DIY TV Projection Solar cooker Diameter 80 mm Focal length 70mm free shipping D80MM F70MM lens | Инструменты

Fresnel Lens DIY TV Projection Solar cooker Diameter 80 mm Focal length 70mm free shipping D80MM F70MM lens | Инструменты

Diameter:80mm

Focus:70mm

thickness:2mm

groove pitch:0.3mm

material:PMMA

facula size:1.5mm

optical transmittance:92%

spotlight multiple:800 times

magnification times:3~~5 times

suitable for shoot the light ,flashlight, industrial and mining lamp lights , etc.

We are professional fresnel lens factory ,we can make  mold  ,what's more ,we can make lens according to  your requirement !

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:
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 customer

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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Large order HSBC bank(Company account)
If you choose A, then we will send you the link of your order for your payment
IF you choose B or C , please send your shipping information(name ,address ,post code , tel  number) to us ,then I  will send PI to you .(PI incllude our Paypal and Union Westem   account )

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

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