LOW COST EXTENDED DEPTH OF FIELD OPTICAL PROBES

摘要

An extended depth of field optical probe (100) includes a lens (102); and a spacer (101) positioned adjacent the lens, the spacer and lens are configured to produce a plurality of waists (w1-w3) at a plurality of working distances by varying at least one of an index of refraction of adjacent optical components of the spacer and a physical geometry of a surface of the probe, and the working distance of a first waist is greater than 0.