Profile of a Conical Surface (GD&T)

[run...@oh.rr.com]

Is anyone here an expert, or at least really good, in GD&T as it
relates to profiles of a surface? I'd like to be able to share with
someone a print I'm working on putting this type of tolerance on.

Jason

[takedown]

I don't know what the drawing standard calls for, but in the optics
drawings I've done and seen conics are typically laid out in the
following steps.

1. Give the equation for the conic in the notes, making sure to use
well annotated datums for the coordinate axes (e.g. apex of the
parabola, planar backside, axis of symmetry, etc).
2. Present a table of points that includes all the locations of
interest. In the case of a round aspherical lens with diameter D, the
table would show Z for R=0 to D. A 2D table can also be used to
represent 3D dimensions (XYZ).
3. Sometimes specific points of interest are assigned as datum
targets.