Fresnel lanterns are a type of lighting instrument commonly used in the entertainment industry, particularly in theater and film productions. They are named after their inventor, Augustin-Jean Fresnel, a French physicist who developed the first lens that could focus light into a beam. Fresnel lanterns consist of a lamp, a reflector, and a Fresnel lens, which is a flat lens with a series of concentric rings on its surface that bend the light and create a wide, even beam. The reflector in a Fresnel lantern is designed to direct the light from the lamp towards the Fresnel lens. The lens then focuses the light into a beam that can be adjusted by moving the lamp closer or further away from the lens. This allows the user to control the size and intensity of the beam, making it a versatile lighting instrument that can be used for a variety of purposes. Fresnel lanterns are known for their ability to create a soft, even light that is ideal for illuminating large areas, such as stages or film sets. They are also commonly used to create dramatic effects, such as spotlighting or backlighting. In addition, Fresnel lanterns are often used as key lights, which are the primary source of light in a scene. Overall, Fresnel lanterns are an essential tool for lighting designers and technicians in the entertainment industry. Their versatility and ability to create a wide range of lighting effects make them a valuable asset in any production.
Augustin-Jean Fresnel, lens, reflector, beam, lighting instrument
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