The working principle of Fresnel lens is based on the refraction of light. By decomposing the continuous surface of a traditional convex lens into a series of planes with different tilt angles (i.e. steps), each step can refract light towards the focal point of the lens. In this way, although the thickness of the lens is greatly reduced, the same focusing effect as traditional convex lenses can still be achieved.
advantage
Lightweight: Due to the significant reduction in materials, Fresnel lenses are lighter than traditional thick lenses.
Thin: The design of Fresnel lenses makes them thinner than traditional lenses, making them easy to carry and install.
Cost effectiveness: Reducing the use of materials and correspondingly lowering production costs.
Flexibility: Large Fresnel lenses can be easily manufactured for specific applications.
The Fresnel lens is a specially designed optical lens named after its inventor, French physicist Augustin Jean Fresnel. Compared with traditional convex lenses, the unique feature of Fresnel lenses is that their surface is engraved with a series of concentric circular stepped structures. These steps are designed so that each part can refract or focus light in a specific way like a whole lens, but the overall thickness is greatly reduced, thereby reducing weight and saving materials
The application range of Fresnel lenses is very wide:
Lighthouse: Originally designed for lighthouses, it is used to focus light so that beams of light can shine over longer distances.
Optical projection: In projectors and stage lighting, Fresnel lenses are used to focus or diffuse light sources.
Solar collector: In a solar collector, it is used to focus sunlight onto a small area to improve energy conversion efficiency.
Visual assistance: used as a magnifying glass to help people with poor vision read.
Car rearview mirror: used to increase the field of view and reduce blind spots.
Fresnel lens is a revolutionary optical component that achieves the functions of traditional lenses through unique design, while significantly reducing weight and material consumption. This type of lens has a wide range of applications in many fields, from lighthouses to solar collectors, and even visual aids. Fresnel lenses play an important role. With the development of optical technology, the application areas and efficiency of Fresnel lenses are still expanding