Description Adds an X-Y Toroidal Asphere surface to the associated FRED document.
Syntax n = AddXYToroidalAsphere ( entity, toroid, coefs )
Parameters n (Long) Node number for the new surface.
entity As T_ENTITY The generic entity data for the new surface.
toroid As T_TOROIDALASPHERE Structure containing data defining the new X-Y Toroidal Asphere surface.
coefs() As Double Array containing aspheric coefficients for the new X-Y Toroidal Asphere surface.
Remarks This function adds a new toroidal asphere surface to the associated FRED document and returns the identifier of the new surface. If it fails, it posts an error and returns a value of -1.
The sag equation of the surface is
where
Cx, Cy are the curvatures in the X and Y directions respectively, and Kx, Ky are the conic constants in the X and Y directions respectively. The aspheric coefficients Ai are entered into the coefs array in the same order as they appear in the summation above.
This surface is similar to Optical Research Associate's XTO,YTO TOROIDAL ASPHERE surface, and Zemax's TOROIDAL surface.
See Also Examples
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