Spherometers - Fast and efficient radius measurement of lenses

Spherometers made by TRIOPTICS are used worldwide in hundreds of optics companies and laboratories for the precise measurement of the radius of curvature of concave and convex lenses. The radius of curvature is determined by the tactile measurement of the sagittal height of the curved lens surface. This high-precision radius measurement by means of Spherotronic® and SpheroCompact®, which can also be used for calibrating test plates, represent the industry’s standard today. In addition, the long-term accuracy and automated functions of our spherometers are highly appreciated in laboratory and manufacturing environments.

Key Features

  • The tactile determination of the radius of curvature of concave and convex lenses permits the multi-purpose use of TRIOPTICS spherometers
  • High measurement accuracy of up to ±0.005 % for radius measurement and calibration of test plates and test tubes
  • Little sphericity deviations of less than 0.1 µm as well as ensuring sample integrity through a high-precision ruby gauge head
  • Traceability of measurement accuracy to international standards through certified measuring rings and certified precision optical flats
  • Quality control possible as early as during the manufacturing process because the sample does not have to be polished in order to perform the measurement
  • Sophisticated technology that is regarded as the gold standard for laboratories and manufacturing
  • Requirement-based selection of models and associated selection of measuring rings having various diameters increase the versatility of the device and ensure a very large measurement range for nearly all applications

Compared to other measurement methods, such as interferometry:

  • Cost-efficient alternative with comparable accuracy
  • Short setup times ensure fast processes
  • Simple measurement method that reduces training requirements for users

Applications

In optics companies and laboratories:

  • Determination of the radius of curvature of concave and convex optical components all the way to spheres and balls from metal materials
  • Calibration of test plates and test tubes

Product Overview

Precise and simple radius measurement of lenses in production

SpheroCompact®

  • Accuracies of up to ±0.05 %
  • Multi-purpose use, particularly for highly curved convex and concave surfaces because small radii of up to +2.5 mm and -4 mm especially can be measured
  • Its compact design allows SpheroCompact® to be used flexibly
  • Spherometer optimized with regard to price and performance for use in manufacturing

High-precision radius measurement

SuperSpherotronic® HR

  • Excellent accuracies of up to ±0.01 % and high reproducibility through the use of a Heidenhain linear encoder
  • Radius measurement of convex and concave surfaces up to +2 mm and -4 mm
  • Excellent precision for the measurement of highly curved surfaces with a large lens diameter by means of an increased travel of 60 mm
  • Extreme resistance to mechanical deformation thanks to the use of tungsten carbide balls in the ring

Highest precision in radius measurement

UltraSpherotronic®

  • Highest measurement precision worldwide with an accuracy of ±0.005 %
  • Radius measurement of convex and concave surfaces up to +2 mm and -4 mm
  • Excellent precision for the measurement of highly curved surfaces with a large lens diameter by means of an increased travel of 60 mm
  • Extreme resistance to mechanical deformation thanks to the use of tungsten carbide balls in the ring