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Hard ceramic coatings (1-5um thick) - CSM Instruments

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Polymer coating on contact lens<br />

Progressive load range: 0 - 4 mN<br />

Indenter radius: 2 µm<br />

Contact lens kept flat by capillary forces<br />

Lc1 = 1.56 mN (first cracking)<br />

Lc2 = 3.85 mN (rupture)

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