In case you missed it, our sag maps now have an automatic setting that will automatically report sag in off-axis coordinates. This is helpful for users who regularly work with off-axis mirror and freeforms. (We’ve added this option to our slope and curvature maps, as well.)
The sag is reported in a new coordinate system centered on the off-axis vertex and with tilt across the aperture removed. Tilt values are reported out in the graphic. Exact sag data can be retrieved using the SSAG operand, where the “off-axis” option is also available. Tilts and other information about the data can be retrieved using the DSAG operand.
![](https://uploads-us-west-2.insided.com/zemax-en/attachment/56062cde-2cc3-4b60-9f77-ca10f8d16bd6.png)
![](https://uploads-us-west-2.insided.com/zemax-en/attachment/fc92f8bd-ae5a-4853-a321-8c15866c1d06.png)