@Renaud.Ligot 

Great that you are sharing this with us. You probably want to log a support case with Ansys as well, and it might help if you share a lens file that demonstrates the issue. If the developers can reproduce the bug, they will have a better chance at fixing it.

Take care,

David

I’m seeing the same issue. It appears that the edge thickness and sag are computed at the clear aperture, which I believe is not what one usually expects.

Moreover, it seems that the scale in printed drawings is off. Below you can see a PDF printout with a reported scale of 3.4:1 and no additional scaling in print. The center thickness (measured in inkscape) indicates a scale of 9.7/3.5 = 2.8.

Unfortunately, the ISO 10110 drawing tool in the latest release (2025 R1.01) is kind of a hot mess.  I certainly appreciate the fact that the development team is trying to add more features and capability (like edge thickness and sag values), but the execution definitely needs improvement.

For example, here is a drawing for a slightly modified version of the “doublet.zmx” sample model. 

There are several problems, including a very cluttered set of dimensions.  In many instances it’s almost impossible to tell what values correspond to what dimensions, and the smaller typeset tolerance values are often unreadable because they are blocked by the dimension lines.  For singlets, the surface sags are now automatically included, along with the edge thickness.  For doublets, just the edge thicknesses are shown.  None of this is under user control.  These dimensions show up and are hard to read, and there is nothing the user can do to change this.  At a minimum, there should be check boxes to allow the user to pick and choose which dimensions are displayed.

Also, as noted above, the edge thickness values are incorrect.  They are evaluated at the clear semi-diameter, not the mechanical semi-diameter.  The same problem exists for surface sags.  This means the drawing must be manually corrected before sending to the fabricator, which entails using Acrobat or an image editor to apply the fixes after printing from Zemax.

The power tolerance (on the radius of curvature) is now double that of what is in the tolerance data editor.  For example, 3 fringes of tolerance now shows up as 6 fringes on the 3/ spec line.  This was not the case in earlier versions.

Lastly, I don’t know why precision is omitted for whole numbers.  For example, if a thickness value is 6.00 mm, I would prefer that it be printed that way.  Instead, the number is printed as 6, and there is no way for the user to override this to add more zeros.  This is actually the least of my concerns, but still something I wish were different.

As custom optics, including aspheres, become more affordable and accessible, it’s important that the lens drawing tool keeps advancing to provide maximum usability per the ISO 10110 specs.  Hopefully the issues highlighted here can be addressed in the next release.

Regards,

Jeff

For information, I’ve created a support case about this issue with Ansys a few months ago. I got an answer that the issue was solved with release 2025 R1.01 which is obviously not the case.

Unfortunately, I find that support in general has become very complicated and inefficient in recent months.  I miss the Zemax days when you could communicate directly and quickly with the support engineers.