This is moreless what says the second article I linked above. Zeiss' selling optronics may also be related to military business in Germany becoming more difficult, as the current Government is slightly less keen than previous ones on permitting exports to countries like Saudi Arabia etc.
Not sure if you think this would indicate anything regarding Zeiss' involvement in military products. But Zeiss Company or the Zeiss Foundation do not have any direct link or a relationship more close than others to the Government. Zeiss ist just one of the bigger and more prominent companies in Germany and Merkel showed up for the birthday party. Different to Airbus, the current owner of Zeiss former optronics department, of which the German state still owns about 12 %.
As for Schott, this has been discussed extensively in another thread, they are a different company from Zeiss (just both owned by the same foundation), so the policy of one company to get rid of military stuff, does not necessarily exclude the other one to continue being active in this.
Finally here another article, about Optronics now being 100% owned by Airbus, so 0% by Zeiss. http://airbusdefenceandspace.com/cassidian-optronics-now-airbus-ds-optronics/
Dalat
I find this to be a very fine distinction if it is even one at all. If they are both owned by the Carl Zeiss Foundation and both contribute to its profits then they both contribute to its losses.
Someone from the foundation must sign off on these sales because they will have an effect on the value of the Foundation. For instance, the Supervisory Board of Carl Zeiss AG has 16 members half of which are from the Foundation. The other half are from the workforce. The Supervisory Board of Schott Glass AG has 12 members: Half from the Foundation and half from the workforce. The phrase used is "equal parts shareholders representatives --- and employees representatives."
There doesn't seem to be much of a wall separating the Foundation from the Corporations.
We saw from the awards the Foundation received from the German government that the Foundation donated almost $100,000,000 dollars (80 million Euros) in subsidies to German Universities to promote the sciences since 2007. Of course these donations were made possible by the profits made by the 2 corporations.
Bob