Fresnel lenses are a series of concentric grooves. They were first used for a lighthouse. They are available in a wide variety of sizes and weights. They are used for light collection applications like emitter or detector setup. The PIR fresnel lens are also able to transmit infrared lights. They are used for various devices such as sensors, automatic light, motion alarms, etc. 

They are also used as a motion detector. The PIR with a fresnel lens can detect motion of about 9-14um wavelength. They are also UV resistant. The fresnel lens with PIR gives full security and has features like fan control, energy management, door activation, and temperature measurements. It works on the principle of propagation of light. It is also used for the production of solar electricity. It can produce electricity in a few minutes or seconds. It is also used for rear projection, cameras, TVs, etc. They are also used for imaging applications. It can easily tolerate non-optical performance. 

Applications of the fresnel lens 

They have many applications like light collection, light collimation, and magnification. The fresnel lens collects the solar light that is considered very parallel. The use of the fresnel lens for the collection of the light is ideal for concentrating the light on photovoltaic cells or for heating surfaces. For example – it is best to use for the maintenance of the home such as heating. The Fresnel lens is used for magnifying and projecting a lens. For any solar applications, it is best because it is an inexpensive, positive, lightweight, and thin lens element. With modern techniques and modern technologies, the pervasiveness of the fresnel lens increases. They are a great tool for interesting optical designs. It is a great 3D lens. It can easily collimate the point of source by placing it away from the source about one focal length.

Manufacture of fresnel lens – The fresnel lenses are made by polishing, tediously, and grinding glass by the hands. The glasses are mold and then poured into moldings by the injection molding technology. It is used in many commercial industries. They are manufactured from a wide range of substrates according to your need for wavelength operations such as acrylic, vinyl, polycarbonate, etc. Acrylic is the best choice in the visible regions and ultraviolet regions because it has a high transmittance. For the region of harsh environments, the polycarbonate is a great choice because it is resistant to high temperature.