Fresnel Lens

Fresnel lens is a common type of lens in the field of optics, which has two main processes: threaded surface lens and non threaded surface lens. These two types of lenses have their own advantages in different applications.

Firstly, threaded surface lenses are commonly used for flat lenses. Its design is relatively easy and usually has high sensitivity. The surface of threaded lenses is usually embossed with various patterns of "turtle shell patterns" or "honeycomb patterns", which can scatter light appropriately and achieve a soft and uniform lighting effect. In the illuminated light field, the beam generated by the threaded lens has no clear boundaries, making it convenient for light reception. Therefore, threaded lenses are widely used in fields such as LED lighting and projection photography lighting.
Secondly, non threaded surface lenses are commonly used for spherical lenses. Compared to threaded lenses, non threaded surface lenses have better performance and can achieve longer detection distances. This type of lens can also achieve soft and uniform lighting effects by suppressing various patterns of patterns. In photography lighting, non threaded surface lenses are also widely used, especially in the field of human infrared sensing lenses, which perform even better.
In summary, the two processes of Fresnel lenses each have their own characteristics, and suitable types can be selected according to specific application requirements. Both threaded and non threaded surface lenses play important roles in LED lighting, projection photography lighting, spotlights, and human infrared sensing.