85mm LED Illuminated Light Track Stand,ZJ-628
Stand Throat Depth:129mm
Coarse/Fine Focus Type: Coarse Focus
Illumination Type: LED Coaxial Transmitted Light
Bottom Illumination: Bright Field
Net weight: 4.77kg (10.52lbs)
Industry product knowledge
A lens is a transmissive optical device that focuses or disperses a light beam by means of refraction. A simple lens consists of a single piece of transparent material, while a compound lens consists of several simple lenses (elements), usually arranged along a common axis. Lenses are made from materials such as glass or plastic, and are ground and polished or moulded to a desired shape.
A lens can focus light to form an image, unlike a prism, which refracts light without focusing. Devices that similarly focus or disperse waves and radiation other than visible light are also called lenses, such as microwave lenses, electron lenses, acoustic lenses, or explosive lenses.