A flat convex lens is a type of lens that is convex on one side and flat on the other. Its materials include K9 glass, fused silica, zinc selenide, zinc sulfide, germanium, silicon, lithium fluoride, magnesium fluoride, calcium fluoride and barium fluoride. So how to calculate the focal length of a flat convex lens?
Focal length (f) is a key parameter of a lens, which represents the distance from the center of the lens to its focal point. For a planar convex lens (i.e. a lens with one side being a plane and the other side being a convex surface), the calculation of focal length usually depends on the curvature radius (R) of the lens and the refractive index (n) of the lens material.
The relationship between focal length (f), curvature radius (R), and refractive index (n) can be expressed using the following mathematical formula: f=R/(n-1)
Among them, n is the refractive index of the lens material (for example, for glass, the value of n is usually between 1.5 and 1.8), and R is the curvature radius of the convex surface (in meters). To calculate the focal length, we need to know the specific values of curvature radius R and refractive index n. The calculation result is: focal length f=0.08 meters, therefore, the focal length of a planar convex lens is 0.08 meters.
The above is an answer to how to calculate the focal length of a planar convex lens. We hope it is helpful to you. If you have any questions, please feel free to consult online or leave a message.
