viewtopic.php?f=9&t=7372
The microscope I managed to get ahold of is busted up Zeiss inverted standard metallurgical microscope that I managed to get ahold from the university, and it has a standard set of (160) EPI-plan objectives (4 (0.1 D = 0), 8 (0.2 D = 0), 16 (0.35 D = 0), 40(0.85 D = 0), (0.95 D = 0) 80x) and KPL8x eyepieces. I have bought a LED-kit from retrodiode, so the illumination is sorted out.
The goal of this microscope classrom demo is 2-fold.
1) Image demo some microchip architechture. This is OK! I will use some polarizers to enhance the contrast, like suggested by the friendly forum people.
2) Show pits in CD-rom and talk about computer memory. (like in this link: http://www.photomacrography.net/forum/v ... 5de000d07a)
This is where I am stuck now. The working distance of the 40x and 80x objectives are too short to image the aluminum film on through the ca 1mm CD-disc. It's pretty frustrating, I have previously managed to do this with ease at my old institution, using a vintage Leitz Ortholux. But with the current setup, I cannot manage because the too short WD of the objectives. I really want to show a live image in the classroom demonstration, so just showing still images wont do it!
So my questions are:
1) How do I find out the WDs of my currently objectives? Is there a good resource for this?
2) Can you suggest some suitable, yet affordable objectives suitable for my Zeiss stand. I'm guessing I need a 40x or upwards EPI-objective to image the CD-rom microstructure, but a sufficiently long WD to get trough the plastic. Would EPI-plan HD series work?
What are my options here?
