Mechanical Attributes – Diameter, CT and Sag/OAH
CONTROLS: Location of mechanical datums, the distance between optical surfaces, or a combination of the two
RELATED TERMS: Center Thickness (CT), Sagitta (Sag), Outside Diameter (OD), Overall Height (OAH)
UNITS: Linear units
SPECIFICATIONS MUST CONTAIN: Nominal value and linear tolerance
OPTIMAX PREFERRED SPECIFICATION: Directly measured quantities
REASONS: Directly measured quantities offer the best chance for repeatable measurements with minimal error sources
MANUFACTURING STANDARDS: MIL-STD-34, ISO 10110-1
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Learn from the Experts
Find out more by downloading our technical paper
Mechanical Attributes: Diameter, Center and Edge Thickness Specification for Lens Manufacture
This paper will explain the role mechanical attribute tolerancing plays in balancing lens function and cost and will help in choosing an optimum tolerance.
