There is not a lot of information online about Dr. C.E. Bleeker. She was a remarkable woman in dutch history. I found about after rescueing a decade resistor bank from the scrapheap at work. When I googled to find out more I was very surprised.
She was the director and owner of the "Nederlandsche Optiek- en Instrumentenfabriek" in Zeist.
If you have more information to share (for example photo's of products made by the factory etc.), please contact me.
See for photo's and some history: http://stage1.phys.uu.nl/wwwigf/Algemeen/bleeker.html
More references:
http://www.nvon.nl/nvox/nvox1999/recensies/recn0899.htm
http://www.nvon.nl/nvox/nvox1998/inhd0398.htm
A dutch text with some history of Zernike and Bleeker:
http://www.lumc.nl/1080/archief/2001/20011012.html
Article in the University of Utrecht magazine when a building was renamed into the 'Caroline Bleeker Gebouw'. It used to be called: Fysics workshop. So the building now has a very fitting name !
http://www.warande.net/~ublad/ubladen/29/31/061Bleeker.html
A very impressive site featuring the work of Tatjana van Vark shows replicas of spectroscopes of Caroline Bleeker. Everyone who appreciates the art of instrumentation building should have a good look at this site !
http://www.tatjavanvark.nl/tvvc/spec.html