Fresnel lens has been paid more and more attention and recognition in many fields over time. Due to the thin thickness
, low quality, low cost and good concentrating effect of Fresnel lens, many fields have begun to pay attention to Fresnel lens . Applications .
Fresnel lens , also known as threaded lens , is a sheet made of polyolefin 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.
Fresnel lens has the advantages of ultra-thin structure, large size, ultra-light weight, arbitrary shape cutting, excellent light transmittance, low price and light and easy to carry. It has many advantages over traditional convex lenses, and its weight is smaller than convex lens. Suitable for a variety of occasions. Compared with other lenses, it has the advantages of small size, light weight and compact structure. It has good concentrating and imaging performance, and is not inferior to other lenses, so it is defensive. Widely used in aviation, aerospace, industrial production and civil use.
Shandong Yuying professional Fresnel lens manufacturers usually use the following three materials:
PMMA and PC materials, PMMA transmittance of 92 ~ 93%, PC transmittance of 86 ~ 89%, these two materials are commonly used in the production of various lenses, widely used in projectors, lamps, magnifiers and other industries.
HDPE material, because HDPE has low light transmittance but good plasticity and toughness, it is usually used to make infrared sensor lenses, which are widely used in smart homes, security facilities, sensors and other industries.
Fresnel lenses are characterized by a higher brightness and flat surface than conventional lenses, as well as large areas of radiation. Usually, the diameter of a common meniscus lens is very limited, and Fresnel plays a very good role in the field of magnifying glass, which can not achieve the effect that ordinary ordinary lenses cannot achieve. Nowadays, the Fresnel magnifier is only 0.45mm thick and easy to carry. In fact, the main function is to reduce the weight of ordinary plexiglass and traditional glass loupe.