OpTaliX: Tolerance and Sensitivity Analysis
2.10. OpTaliX: Tolerance and Sensitivity Analysis¶
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Using Tolerance Sensitivity Items in Optimization If optimizing (minimizing) for tolerance sensitivity, the various tolerance sensitivity items described in the previous section should be understood as aberrations added to the targets/constraints (merit function) list.
See also the syntax for defining tolerance sensitivity. Here is a typical example in the optimization targets/constraints list:
efl = 100 Focal length shall be exactly 100mm.
spd 0 Spot diameter (rms) shall be zero (minimized) for all fields, wavelengths, zoom positions.
tsa s1..5 f1..2 w1 0 Tolerance sensitivity on surface tilt about X-axis shall be minimized for surfaces 1-5, fields 1-2 and wavelength number 1.
tsy 0 Tolerance sensitivity on surface Y-decenter shall be minimized for all surfaces, all fields and all wavelengths defined in the optical system configuration.
Note: Do not attempt to request a tolerance sensitivity item to become exactly zero, e.g. ‘TSA = 0’ as this is impossible on optical elements/surfaces that have optical effect. Instead minimize it by omitting the equal ‘=’ sign in the constraints definition, e.g. ‘TSA 0’.