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Telecentric Lenses: Gauge the Difference

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Metrology applications benefit from constant magnification and perspective.

David E. Smith, Melles Griot Optics

For decades, engineers developing metrology instrumentation have used telecentric lenses in their products. Contour projectors and optical comparators, for example, owe much of their measurement capability to these unique lenses.Over the past decade or two, as new technologies have shifted product emphasis toward electronic features and digital processing, optical system design has frequently been relegated to a low priority, with the expectation that software will correct poor imagery.Quite recently, however, there has been a revival of interest in solving imaging problems in the optics and...Read full article

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