a static substrate and a dynamic substrate that can be coupled together by a flexible spring an exemplary static substrate can be for example an injection molded thermoplastic material that can be secured to a chassis of a scan engine and remains static with respect to the scan engine the dynamic substrate can also be for example an injection molded thermoplastic material in an embodiment of the invention the substrates are coupled together by a flexible spring made of lim or any other injection moldable material such as for example silicone in alternate embodiments any material that can have flexible properties can be used to make the spring the substrates can be coupled together using a multiple shot molding process such as for example an over mold process lim material provides excellent shock protection because it can withstand substantial elongation before failure this property allows any shock event such as for example a drop from six feet to significantly lower g levels by stretching out the shock event in time since the amount of energy in a shock event is determined by the g level and the duration of the event i e the amount of energy in the shock event is equal to the area under a curve of.