Re: Using darkfield stop in Zeiss phase condenser


"Oncologists" <Oncologists@xxxxxxx> wrote in message
news:1174161224.370409.51020@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Lovely darkfield with the Ph3 plate and the x10 and x20 (non-phase)
objectives, but how do you use the built-in darkfield stop? Tried it
with all objectives, condenser positions, and top condenser lens on
and off. Dimfield, yes; darkfield not!
It's a big stop and looks as though it designed for x40. Don't want to
try oil in case it spoils the condenser lens. Anyone know how to use
this please? Thanks to all who have helped with my previous,often
crass, queries!, HJ


If the condenser is pancake with out a swing out lens using oil is fine, no
problems. If it is a swing out then swing the top lens out and that should
produce dry dark field. If it is an oil condenser then oil the top and that
should produce good dark field. Remember that you should have an adjustable
100X. You will need to have a 100X with about a 1.00 NA, adjustable 100X
were made to do that.

Thanks,

Kevin Cunningham
SMS


.

Relevant Pages

  • Re: Condenser and aberrations
    ... I need to design a condenser lens for projecting a slide to infinity using ...
    (sci.optics)
  • Re: What Is Involved With A/C Changeover To R134a?
    ... much of the old oil as will come out, then refill with R134 oil and ... condenser, and watched the oil stain spread under it. ... The compressor is probably shot. ... You might try the cheapest conversion on those old cars and see if it ...
    (rec.autos.tech)
  • Re: AC pressure switch field replaceable?
    ... Also, however much a system leaks R12, it ... Condenser size and air flow is the main issue on r134a retro fits. ... The issue of oil is also less of a problem on systems ...
    (rec.autos.tech)
  • Re: Question re Olympus Universal Condenser
    ... indeed any immersion lens, when used without oil. ... You showed us before an Ap image of yours made WITH immersed condenser ...
    (sci.techniques.microscopy)
  • Re: AC Condenser leaks - how to repair?
    ... Now I'm trying to replace the AC condenser. ... Use the correct oil type and viscosity. ... of oil to each component as specified by Toyota. ... Pull a deep vacuum to 500-700 microns, shut off vacuum pump and isolate ...
    (rec.autos.tech)