THERMO-MECHANICAL STABILIZATION OF NITINOL WIRES IN AN OPTICAL IMAGE STABILIZATION SUSPENSION
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United States of America Patent
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Issued Date -
Mar 30, 2017
app pub date -
Sep 29, 2016
filing date -
Sep 30, 2015
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Abstract
A method and system for stabilizing properties of shape memory alloy (SMA) wires in an optical image stabilization (OIS) suspension of the type having a first or support assembly and a second or moving assembly coupled with respect to one another by the SMA wires. Embodiments of the method comprise cyclically mechanically straining and de-straining the wires by moving the moving and support assemblies with respect to one another while heat is applied to the wires. The temperature, strain, and de-strain levels are configured to cause the wires to cyclically transition between austenite and martensite phases during the mechanical straining and de-straining.
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