Principle of the Centering Error Measurement in Reflection and Transmission Mode
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چکیده
The following sections describe the measurement principle behind the OptiCentric® instruments and typical errors which occur during the assembly of lenses and objectives. The measurement of a centering error primarily involves defining a point of symmetry in relation to a reference axis. This can, for example, be the center of curvature of a lens surface or the location of a focus point of a lens in relation to a reference axis. When the center of curvature of a lens surfaces is used for measurement of centration errors, the measuring procedure is known as “Reflection Mode”.
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