Fresnel pronunciation

Fresnel lens

Fresnel lens,also known as threaded lens, is a sheet made of PMMA material,which is also made of glass.the surface of the lens is smooth on one side and the concentric circles on the other side are small to large.its texture is designed according to the dryness of the light involved in the disturbance and the relative sensitivity and acceptance angle requirements.The light enters from one side passes through the Fresnel lens on one side and focuses out to a point or in parallel light.Such lenses are usually designed as collimating mirrors(such as Fresnel lenses for projection,magnifying)and concentrating mirrors(such as Fresenl lenses for collecting heat for solar energy)

Share this information with your networks and remind everyone of the importance of protecting their eyes during a solar eclipse!

Fresnel Blender

A solar eclipse occurs when the Moon completely or partially covers the Sun. This is a fascinating spectacle, but it is very important to guard against temporary or permanent damage to the eyes.

Fresnel effect

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

(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.)

Fresnel Light

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

A total eclipse is set to occur on April 8, 2024, spanning from Southern Ontario to Newfoundland and Labrador, with the rest of Canada experiencing a partial eclipse. While these events are awe-inspiring, they also pose potential risks to eyesight if proper precautions are not taken. During a solar eclipse, the Moon moves between the Sun and the Earth, partially or completely blocking the Sun's rays. The danger lies in the fact that even during a partial eclipse, the Sun's intense radiation can cause severe damage to the eyes. Looking at the Sun directly during an eclipse can lead to solar retinopathy, permanently damaging the retina's light-sensitive cells.  Even a brief look at the partly eclipsed Sun can result in harm to the eyes. Children may need extra supervision during eclipses as they may not fully comprehend the risks involved, so parents are encouraged to educate their children about eye safety and provide proper filters or alternative safe viewing methods.

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.

A solar eclipse occurs when the Moon completely or partially covers the Sun. This is a fascinating spectacle, but it is very important to guard against temporary or permanent damage to the eyes.

The transmittance of the material is important to be the influence of the lens, so the high transmittance material Fresnel Factory using is Poly visible (UV CUT).

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.