Paraxial XY

The paraxial XY surface type is similar to the paraxial surface except the optical power can be specified in the X and Y directions separately. This surface can therefore be used as a paraxial cylindrical or toroidal lens. Two parameters are required to define the paraxial XY surface: the X power, and the Y power. OPD through paraxial XY surfaces is computed using mode = 1 described in the paraxial surface description. Optical power is measured in inverse length lens units, such as inverse millimeters if the lens units are millimeters. See "Units".

The paraxial XY surface shape is plane.

PARAMETER DEFINITIONS FOR PARAXIAL XY SURFACES

Parameter #	Definition
1	X Power
2	Y Power

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• Periodic