A4 Fresnel lens
€19,95
A4 Fresnel lens for instant heating or lighting of all types of materials. The Fresnel lens converges the sun’s rays into a focal point 30 cm away. Flexible, lightweight and unbreakable, the Fresnel lens can be used for starting fires or barbecues, solar cooking or solar pyrography. Dimensions: 21 x 27 cm.
43 in stock
Pay in instalments
A4 Fresnel lens
The A4 Fresnel lens is a thin, flat optical lens invented by French physicist Augustin Fresnel in 1822. Unlike a traditional lens, it’s made of a series of narrow concentric grooves glued to the surface of a lightweight plastic sheet. Each groove has the same focal length, but is at a slightly different angle to the next in order to concentrate the light at one point. Each groove can be thought of as a small individual lens that bends the light.
Benefits
The advantage of the Fresnel lens is that it greatly reduces the thickness of a conventional lens. The use of plastic instead of glass makes the lens thinner, lighter and more economical, while maintaining the same performance. This also makes the Fresnel lens flexible and unbreakable.
Using the A4 Fresnel lens
Put the Fresnel lens in front of the sun and the light will be concentrated in a point at the focal distance of 30 cm, allowing you to heat and/or light any type of material instantly. It can also be used to start a fire or barbecue, solar cooking or solar pyrography.
Features
- Dimensions: 21 x 27 cm
- Material: PVC
- Focal length: 12 cm
- Weight: 34 grams
| Weight | 0,025 kg |
|---|
You may also like…
Out of stock
€99,95
