Abstract — We describe a technique for non‐contact thickness measurement that can be applied for samples that do not have smooth reflecting surfaces. An example is an adhesive deposited on top of a foam substrate. We use low‐coherence interferometery to obtain an array (a scan) of single‐point measurements using standard OptiGauge Control Center (OCC) software. We describe the algorithm for data processing to extract the effective thickness data for the adhesive layer.
Abstract — We describe an optics‐based technique for non‐contact measurements of the thickness parameters of intraocular lenses (IOLs). The technique is based on time‐domain low‐coherence interferometry (LCI) using a beam of light directed to a point on the measurement surface. We show how this technique can be used to measure the difference in thickness of the opposite haptics, and to measure the center thickness of the IOLs located on a mandrel or suspended in a solution.