Dictionary » F » Field-emission microscope

Field-emission microscope

Field-emission microscope

(Science: instrument, microscopy) Either one of two kinds of point-projection microscopes, both invented by E. W. Muller: (1) The older device (1936) is a specialised cathode-ray tube, employing field-emission of electrons from a negatively charged tip of a very sharp needle in a vacuum, by point-projection of the image onto a positively charged, fluorescent screen. (2) a later device (field-ion-mission microscope, 1950) emits absorbed helium ions from an anode.


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


Recommendations for Bacteria Detection?

... I apologize if this is a dumb question-I'm quite new to the biology field and to be honest at this point I'm not even sure if I'm asking the ... can help me out with that? Or is the best way to get some sort of field microscope and put a sample on a glass slide? Thank you very much for your ...

See entire post
by lodestone25
Sun Jul 27, 2014 6:20 pm
 
Forum: Microbiology
Topic: Recommendations for Bacteria Detection?
Replies: 1
Views: 569

Please help me decide which microscope to buy

I'm not sure what an inverted microscope is, but if you're looking at unstained cells, some special beam arrangements should be there - phase contrast, dark field, something...

See entire post
by Darby
Wed Nov 06, 2013 6:42 pm
 
Forum: General Discussion
Topic: Please help me decide which microscope to buy
Replies: 2
Views: 1596

Extra Light For Compound Light Microscope ???

"Compound Light Microscope : This microscope uses visible light for illuminating the object . it contains ... specimen ? , ( explain me everything about this microscope ... ) tell me about dark field , phase contrast microscopes also :) thx in advance .........

See entire post
by Kehsibashok
Sun Jul 28, 2013 6:12 am
 
Forum: Cell Biology
Topic: Extra Light For Compound Light Microscope ???
Replies: 1
Views: 1327

Microscope advice for a non-biologist

... first post. I realise there's a distinction between low and high power microscopes now! My partner says she'd like to be an entomologist; which ... able and willing to help despite my obvious lack of a clue in this field.

See entire post
by AlanGarden
Mon Apr 29, 2013 10:52 pm
 
Forum: General Discussion
Topic: Microscope advice for a non-biologist
Replies: 3
Views: 2085

help please 1

... less than 200 micrometres so to observe most cells we have to use a microscope- So does this mean that a naked eye can see a cell but cannot ... at a 3-dimensional structure with shadows, we get a greater depth of field than with the TEM, but less magnification. - The cell theory is one ...

See entire post
by Stephen1993
Thu Feb 16, 2012 2:30 pm
 
Forum: Cell Biology
Topic: help please 1
Replies: 9
Views: 7037
View all matching forum results

This page was last modified 21:16, 3 October 2005. This page has been accessed 787 times. 
What links here | Related changes | Permanent link