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3D inspection microscope using holographic primary objective

With refraction microscope optics it is generally understood that as magnification increases field-of-view will decrease. This constraint has posed scaling limitations for microscopy of large objects. We have shown in theory and proven in a reduction-to-practice that in the special case of grazing incidence diffraction, as magnification increases, field-of-view remains constant while efficiency goes down. This distinction has utility for many 3D optical inspection tasks. A holographic optical element (HOE) is used as the microscope's primary objective, and a laser stripe is used to interrogate target surfaces. The microscope's HOE can be embossed in polycarbonate and offered as a consumable part that can be replaced inexpensively if it becomes contaminated. Specimens can be placed on a moveable stage and advanced to collect a sequence of 3D profiles. Laser speckle is ameliorated as a natural consequence of the scanning mechanism. A prototype of the microscope has been demonstrated in a desktop embodiment. It is contemplated as a profiler for industrial inspection and quality control.