{"version":"1.0","type":"link","title":"Spherometer - Newikis","description":"A spherometer is a precision instrument used to measure the radius of curvature of a spherical surface, such as that of a lens, by measuring its sagitta. A typical spherometer has three outer legs arranged in an equilateral triangle and an adjustable central screw; the displacement of the screw,…","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400,"thumbnail_url":"https://thumb.wikimedia.org/wikipedia/commons/thumb/4/4e/Spherometer.jpg/1280px-Spherometer.jpg","thumbnail_width":1280,"thumbnail_height":960}