aspheres lenses 2

IMOS manufactures premium-quality lenses at
extremely competitive prices.
Here are the measured values of the sample lens measured using five test specimens
taken from the production line as random samples. For information about the advantages of IMOS plastic aspheres click more...

Test specimens	Measure-ment 1 ELF (mm) focal length	Measure-ment 2 ELF (mm) focal length	Measure-ment 3 ELF (mm) focal length	Average	Desired value f = 6.595	Standard deviation (1)
1	6.594	6.600	6.600	6.598	6.595	0.007
2	6.599	6.586	6.599	6.595	6.595	0.006
3	6.592	6.586	6.599	6.592	6.595	0.005
4	6.600	6.594	6.594	6.596	6.595	0.003
5	6.587	6.600	6.593	6.593	6.595	0.005

(1) The standard deviation is the difference between the measured value and the mean square average, summed up for all the individual measurements, divided by the number measurements, with the second root then extracted.