Wedge Lens
CONTROLS: Location of once center of curvature relative to some other item. It may be related to another center of curvature, a plane in space, or a physical datum.
RELATED TERMS: Edge Thickness Difference (ETD), Edge Runout (ERO), Wedge, Mechanical Wedge, Total Indicated Runout (TIR), Beam Deviation
UNITS: Linear units or angular units
SPECIFICATIONS MUST CONTAIN: Relationship between a center of curvature and the reference.
OPTIMAX PREFERRED SPECIFICATION: ETD
REASONS: Directly measured on the machine or with little specialized equipment
MANUFACTURING STANDARDS: ISO-10110-6
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Find out more by downloading our technical note on Centration
Specifying And Measuring Spherical Surface Irregularity
Define surface irregularity for spherical surfaces, offer information on measurement methods for testing surface irregularities, and some specification guidelines.
