A system for determining a the distance from tool to camera in a work area of a bond tester, comprising: – a light source positioned sidewards of the work area, configured to emit a light beam for illuminating the tool from the side; – a camera, positioned sidewards of the work area across of the light source, arranged to capture images of the light source and the tool; – a processor, communicatively coupled with the camera and configured for processing images received from the camera, wherein in use the tool is positioned within the light beam that is emitted from the light source to the camera, and wherein the processor is configured to determine positioning data of the tool by evaluating local differences in light intensity on the images captured by the camera while viewing the light source and the tool.
Links: Espacenet
A bond tester, for testing a characteristic of a bond between a substrate and an element bonded to said substrate, the bond tester comprising: – a tool configured to be in contact with the element during a test cycle, the tool moveable towards and away from the element to be tested; – a positioning camera, for viewing the substrate through a lens thereof, and – a processor, arranged in communication with the positioning camera for receiving images taken by said camera, the processor configured for determining a position of the tool relative to the element based on said images, wherein the camera effectively views the substrate at an angle compared to a direction normal to the substrate, allowing the camera to view both the element to be tested and the tool when the tool is in a position near or in contact with the element.
Links: Espacenet
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Clyde Chen
