Product Code : EL-PLE-11746
Eduscope India is a leading Spherometer
Quick Answer: The Spherometer is a precision instrument that measures the radius of curvature of a lens or curved surface, built in all-brass construction with three fixed steel legs and a fine central screw-thread reading mechanism.
Three accurately positioned steel legs form a fixed reference plane; a central steel screw, running in adjustable brass bearings, is first zeroed on a flat surface, then advanced until its tip touches the curved surface under test. The small height difference between the plane of the legs and the surface centre, read off the circular scale against the table scale, is used to work out the radius of curvature via the standard spherometer relation. It is widely used in optometry to check spectacle and contact lens curvature, and in the physics lab to relate a lens or mirror's curvature to its focal length — a reliable physics lab instruments India tool for optics practicals.
