Description

Measures radius of curvature of spherical surfaces of spherical lenses. Three fixed legs and one central screw, a total four-point contact with a screw pitch of 1mm giving a least count of 0.01mm based on circular scale division. Vertical brass scale marked ±10 mm and Brass dial with 100 divisions graduated 0–100. Mounted on Three-point base for stability on curved surfaces. Durable black paint on frame and polished brass scale and screw head.