Integrated electrochromic aperture diaphragm

Author(s):  
T. Deutschmann ◽  
E. Oesterschulze
Keyword(s):  

2020 ◽  
Vol 56 (6) ◽  
pp. 660-664
Author(s):  
P. P. Dobrovolsky ◽  
I. I. Kremis ◽  
S. V. Khryashchev ◽  
A. R. Novoselov ◽  
S. M. Churilov
Keyword(s):  




Author(s):  
M. Hibino ◽  
M. Kuzuya ◽  
T. Hanai ◽  
S. Maruse

There have been a number of methods proposed and investigated for the correction of the spherical aberration, since this aberration is one of the most important factors which limit the performance of various kinds of electron beam instruments. A foil lens has been investigated preliminarily and the possibility of correcting the spherical aberration of a conventional magnetic lens with reasonable ease has been shown for the first time.The foil lens studied consists of an aperture diaphragm and a thin conducting foil fundamentally as is shown in Fig. 1, and is simple enough in design and adjustment. When the voltage is applied between the diaphragm and the foil, the curved potential distribution is produced around the aperture and the foil lens acts as a concave or negative lens. This concave lens produces the negative spherical aberration and can be utilized to correct the positive spherical aberration of the conventional magnetic lens.



Author(s):  
Shun-Hao Yu ◽  
Chih-Chieh Chang ◽  
Jheng-Hong Gu ◽  
Jui-che Tsai
Keyword(s):  


1984 ◽  
Vol 23 (21) ◽  
pp. 3851 ◽  
Author(s):  
M. Velghe ◽  
D. A. G. Deacon ◽  
J. M. Ortega


2017 ◽  
Vol 201 ◽  
pp. 155-163 ◽  
Author(s):  
M.N. Osipov ◽  
R.N. Sergeev


2000 ◽  
Vol 67 (5) ◽  
pp. 465
Author(s):  
A. P. Grammatin ◽  
E. A. Lustberg ◽  
L. A. Mirzoeva ◽  
N. Yu. Mavrina


2003 ◽  
Vol 11 (1) ◽  
pp. 24-28
Author(s):  
Theodore M. Clarke

My first universal student microscope, shown in Figure 1, began life as a Monolux microscope from the 1960rs. Its development into a universal student microscope began when my wife wanted a polarized light microscope with the ability to photograph microscopic crystals under a cover glass for their artistic value. My background as a metallurgist was with the reflected light metallurgical microscope, I have also designed and built vertical illuminators for brightfield illumination of complete metal log raphic specimens using a fiber optic light guide end as the light source with lens configurations giving an imaged field diaphragm and an illumination aperture diaphragm imaged in the aperture of the macro lens.



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