Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Particle-optic illuminating and imaging system with a condenser-objective single field lens










Image Number 3 for United States Patent #6531698.

The invention relates to a particle-optic illuminating and imaging system with a condenser-objective single field lens (5) and a simple illuminating system which has only two condenser lenses (3, 4). The variation of the size of the illuminated field takes place exclusively by a change of the excitation of the source-side condenser lens (3). The objective-side second condenser lens (4) always has a constant excitation in the TEM mode. The excitation of the source-side condenser lens (3) is the greatest for maximum illuminating field diameter, and on the contrary is reduced for smaller illuminating field diameters. In TEM operation, two crossovers always exist in the illuminating beam path, of which the second is situated between the focal plane of the condenser-objective single field lens and the specimen plane (6).








 
 
  Recently Added Patents
Concentration measuring apparatus for hydrogen sulfide in gas flow, and method for determining sulfide ion
Sensor coating
Circuit arrangement for a piezo transformer, and method therefor
Low cost mesh network capability
Calcium carbonate granulation
Air filter
Card reader device
  Randomly Featured Patents
Solid-state cumulative operations measurement system
Data processing method in network system connected with image processing apparatus
Automatic solar lighting apparatus having a solar following sensor
Zero backlash planetary gear train
Method of manufacturing formed articles, equipment for practicing same, and formed articles manufactured by the method
Filter elements
Microwave treating mechanism
Self aligned impact-ionization MOS (I-MOS) device and methods of manufacture
Process for producing moldings of expanded graphite, process for conducting, exchanging or storing heat using moldings and process for producing a heat storage device
Method and structure to reduce contact resistance on thin silicon-on-insulator device