spherometer

English

A common type of spherometer

Etymology

sphero- +‎ -meter.

Noun

spherometer (plural spherometers)

1. (optics) A device used to measure the curvature of a surface, such as a lens.

   More precisely, a spherometer directly measures a sagitta (distance between a point and a chord), allowing the radius of curvature to be calculated.

Translations

measuring device

• Catalan: esferòmetre m
• Galician: esferómetro m
• Italian: sferometro m
• Malay: sferometer
• Portuguese: esferómetro m (Portugal), esferômetro m (Brazil)
• Spanish: esferómetro (es) m

• Spherometer in the Encyclopædia Britannica (11th edition, 1911)