Typical applications include:
 

Concave or convex optical components

Metal- and glass balls

Polishing tools
 
Both instruments share lots of advantages:
 

High accuracy

Easy to use

High reproducibility of the measurement results irrespective of the operators qualification

The measurement results can be stored and printed out

Accuracy directly traceable to international standards
 
Advantages
 
Compared with other radius measuring methods (e.g. interferometers) the spherometric measuring method provide a multitude of advantages:
 

the precision spherometers offer for comparable accuracy dramatically reduced costs.

the measurement time for PC-controlled spherometers is a fraction of the time needed to set up, to align and to take a measurement with interferometers.

since the measuring procedure is so simple, no highly qualified personnel is required.

when it comes to measure large aperture optics or radii longer than 1m, the interferometers become impractical due to the high costs or impossibility to realize the extra-long mechanical set up.

using spherometers the radius can be accurately measured before polishing, when a correction of the lenses is still possible. The accuracy of measurement is directly traceable to international standards, since TRIOPTICS spherometers are calibrated with (NIST and NPL) certified test plates.