Abstract: A first light source is directed at an outer surface of a workpiece in an inspection module. The light from the first light source that is reflected from the outer surface of the workpiece is directed to the camera via a first pathway. The light from the first light source transmitted through the workpiece is directed to the camera via a second pathway. A second light source is directed at the outer surface of the workpiece 180° from that of the first light source. The light from the second light source that is reflected from the outer surface of the workpiece is directed to the camera via the second pathway. The light from the second light source transmitted through the workpiece is directed to the camera via the first pathway.

Abstract: A first light source is directed at an outer surface of a workpiece in an inspection module. The light from the first light source that is reflected from the outer surface of the workpiece is directed to the camera via a first pathway. The light from the first light source transmitted through the workpiece is directed to the camera via a second pathway. A second light source is directed at the outer surface of the workpiece 180° from that of the first light source. The light from the second light source that is reflected from the outer surface of the workpiece is directed to the camera via the second pathway. The light from the second light source transmitted through the workpiece is directed to the camera via the first pathway.

Abstract: An apparatus for illuminating monocrystalline and polycrystalline substrates in order to image micro cracks, pinholes and inclusions in the substrates is disclosed. A first illumination system illuminates a first line of light on the front surface of the substrate. A second illumination system illuminates a second line of light on the front surface of the substrate. The first line of light and the second line of light are oriented transverse to the transport direction (T). The second illumination system is arranged within a 3-dimensional coordinate system such that the substrate is illuminated under a second angle. The arrangement of the second illumination system is comparable to a street lamp. A camera, preferably a camera, is arranged such that it faces the back surface of the substrate. The camera captures light which is transmitted through the substrate from the first illumination system and the second illumination system.

Abstract: A system for characterizing interruption defect induced efficiency loss in a photovoltaic cell includes an inspection system configured to acquire inspection data from a photovoltaic cell, a control system configured to: receive the inspection data acquired from the photovoltaic cell, identify one or more interruption defects in one or more fingers of an electrode of the one photovoltaic cell utilizing the inspection data, determine a spatial parameter associated with at least one of the identified interruption defects and one or more floating finger portions of the one or more fingers created by two or more identified interruption defects, determine an interruption-defect-induced efficiency loss of the photovoltaic cell based on the determined spatial parameter associated with the at least one of the identified interruption defects and the floating finger portions of the one or more fingers created by two or more identified interruption defects.

Abstract: Apparatus for illuminating monocrystalline and polycrystalline substrates (10) is disclosed in order to image micro cracks, pinholes and inclusions in the substrates (10). A first illumination system (1) illuminates a first line (11) of light on the front surface (31) of the substrate (10). A second illumination system (2) illuminates a second line (12) of light on the front surface (31) of the substrate (10). The first line (11) of light and the second line (12) of light are oriented transverse to the transport direction (T). The second illumination system (2) is arranged within a 3-dimensional coordinate system such that the substrate (10) is illuminated under a second angle ?. The arrangement of the second illumination system (2) is comparable to a street lamp. A camera, preferably a camera (6), is arranged such that it faces the back surface (32) of the substrate (10).