Telecentric and standard area backlights are powerful tools in locating and measuring edges, while in-line and ringlight illumination sources excel in applications in which evaluating surface detail is critical.JEREMY GOVIER, EDMUND OPTICSFor machine vision applications requiring telecentric lenses, the proper illumination can be critical to the success of the imaging system. Achieving properly angled, even illumination can greatly affect the contrast of the image and the accuracy of measurements calculated from the image. A telecentric lens and backlight illuminator used for bottle inspection. Courtesy of Edmund Optics. To understand how illumination interacts with a telecentric lens, it’s important to first understand what makes a telecentric lens different from a standard imaging lens. 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This free virtual conference gathers the leading names and thinkers in the machine...Photonics.com 7/19/2022PHOTONICS DICTIONARY TERMSspot meterA telescopic light-sensing meter used to measure illumination levels of small regions at a distance of many feet; it is used in professional motion picture and television production to ensure proper...EDU.photonics.com 9/8/2009endoscopeA medical instrument used to view inside the human body by inserting the instrument into a natural or created aperture. The endoscope may use a coherent fiber optic bundle or conventional optics to...EDU.photonics.com 9/8/2009backlightingThe forming of a clear silhouette of an object by placing a light source behind it. 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