Groove pitch 0.2mm, LARGE FRESNEL LENS, LF700-780, FL=700mm, 3D image, FL700-780

In stock
10 days
Add to wish list  
Shipping method
Payment options
Our advantages
  • Best optical performance at IR
  • Qualified with global buyers
  • Handful experience with R&D



Screen, large Phil pinch lens

Our company is improving our skills and systems of Diamond Turning Machine for

large size Fresnel lens.

We are one of world leading company of mold and large Fresnel lens. Base on

this technical advantage, we develop lenses for concentration, solar oven, integral

photonics and magnifier.





Focal Length (mm) : 700
Size (mm) : 780x780mm 
Groove pitch(mm) : 0.2mm
Thickness(mm) : 5T
material : PMMA






Also we design to use more 3mm Optical PMMA for loner life time and to have 0.5 ~ 1.0mm groove pitch for higher solar concentration.

(If groove pitch is density, then quality of image that is maginifed is clearer.If groove pitch is width, then efficince of concentration of light is higher.)



◈ Refraction of light with Conve and Concave lens



◈ Cone lux diagram (50, 90, 120˚)

The basic functions of the lens to refract light, can spreading or condensing the light emitted from the light source.

Fresnel lens a lighter and thin than convex(concave) lens.

So, when the Fresnel lens used in lighting equipment to make a lighter, smaller apparatus.



◈ Fresnel lens concentration rate

Concentration rate is ratio between area of solar cell and area of Fresnel lens.

Ex) Fresnel lens size 120*120mm → area of lens is 14400mm2
Solar cell size 5*5mm → area of solar cell is 25mm2
Concentration rate is 14400/25 = 576 times

However because of transmittance rate and other obstructs, multiple 80% is reasonable.
Adjusted concentration rate is (14400*0.8)/25 = 460 times


◈ Efficiency and F number

F=focal legnth/Diameter

From F1.2, the efficency is dramatically droped. It shows there is a certain ratio between focal length of fresnel and diameter of lens.

Bigger size Lens is not always the answer.



◈ Comparing transmittance of SOG(Silicone On Glass) and PMMA

Our Optical PMMA has higher transmitive than glass, which is 92~95%, and absorption in visual ray is almost 0%




We are happy to work with individual inventor and developing company.
Custom Design is available.

※ Maximun capacity
Max size : Ø1600mm
Groove Pitch : 0.07~2mm
Thickness : 0.4~10mm


According to our customer’s needs, we recommend ideal solution from our 106 existing products, which are increasing in diversity. 
We are prepared to take from design to prototype to volume production.



Tel : +82 70-7605-1652


English webpage :


Please visit our Developed Case List and see our achievements. 


Application book                                          Polymaterial                                          Design request

                                  The unique USA and Korean based manufacture             Special engineered polymers,such as PMMA,PC,PE                       Infrared fresnel optics

                                               having technology for Fresnel lens                          PET for optics.Infrared,Visible and UV light purpose.                      Mold production