An optical interface module includes a single flexible Printed Circuit Board including conductive traces. Such may be advantageously facilitate computation with computing systems that employ one or more analog processors, for example one or more quantum processors. The method may: 1) generate a Low Discrepancy Sequence of points in the region; 2) calculate an LDC in the region based on the LDS of points; and 3) scan the region along the LDC to determine one or more characteristics of the object in response to the scan. The retainer apparatus is place into the locked state by applying a force to the leg to substantially lock the slidable engagement and retaining the form mold.