What are Zeiss Jena HI finite objectives?
Moderators: rjlittlefield, ChrisR, Chris S., Pau
- enricosavazzi
- Posts: 1474
- Joined: Sat Nov 21, 2009 2:41 pm
- Location: Västerås, Sweden
- Contact:
What are Zeiss Jena HI finite objectives?
I need a refresher - What does "HI" mean in the engravings on Zeiss Jena finite objectives? I have for example a Zeiss Jena Apochromat HI 60x with adjustable NA from 0.7 to 1.0, in RMS mount.
--ES
-
- Posts: 1152
- Joined: Thu Mar 07, 2013 5:24 am
Hi Enrico,
HI = Oil
HI is the abbreviation for homogenous immersion but it means oil immersion.
Zeiss Jena acknowledged that this isn't homogenous immersion in the strictest sense; the refractive indices of cover glass, immersion oil and objective front lens are slightly different (not completely homogenous). They held onto the HI from Abbe's era until 1990 while other companies started to use the "oil" designation.
Any modern synthetic ISO immersion oil (nD = 1.515) will work with these objectives.
Happy Easter, Ichty
HI = Oil
HI is the abbreviation for homogenous immersion but it means oil immersion.
Zeiss Jena acknowledged that this isn't homogenous immersion in the strictest sense; the refractive indices of cover glass, immersion oil and objective front lens are slightly different (not completely homogenous). They held onto the HI from Abbe's era until 1990 while other companies started to use the "oil" designation.
Any modern synthetic ISO immersion oil (nD = 1.515) will work with these objectives.
Happy Easter, Ichty
- enricosavazzi
- Posts: 1474
- Joined: Sat Nov 21, 2009 2:41 pm
- Location: Västerås, Sweden
- Contact: