The CC-300 calibration lens for measuring the curvature radius of contact lenses is a calibration device designed specifically for the relevant content of sections 4.2.3.1 (and 4.3.3.1) of GB/T 11417.6-2012, and is suitable for the calibration of optical spherometers and corneal curvature meters.

CC-300 is made of optical glass H-K9L, with one side being flat and the other side being concave spherical.

Packing list:

Concave sphere 1: nominal curvature radius of 6.50mm

Concave sphere 2: nominal curvature radius of 8.00mm

Concave sphere 3: nominal curvature radius of 9.50mm

Matching toolbox (including shock box): 1 set

Silicone tweezers: 1 pair

Calibration certificate: 1 copy (optional)

Explanation: Please refer to the calibration certificate for the actual value of curvature radius

Sample of Calibration Certificate from Metrology Institute:

Calibration precautions:

Calibration should be performed at room temperature of 20 ℃± 5 ℃, and the equipment should be preheated to equilibrium.

Each lens should be independently measured 10 times and its arithmetic mean calculated

Plot the test results of the three lenses as calibration curves and correct the final measurement results