Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Characterization of individual particle atomic composition by aerosol mass spectrometry










Image Number 6 for United States Patent #6784423.

A method for determining the shape and size of particles and their constituent elements is disclosed. Particle ions are accelerated through a mass spectrometer useful in identifying the source particle of the resulting ions. By measuring the time-varying intensity of the identified ions as they strike a detector, a plot of the intensity of the ions over time is obtained for each ionized particle. The size of each ionized particle is determined by measuring a time span corresponding to the width of the peak of this plot. If the detector is a phosphor detector, the shape of the particle may be determined by using a high-speed camera to capture cross-section images of the ion-induced light pattern at closely-spaced successive moments in time. Alternatively, the intensity of ions striking the detector along at least one lateral dimension may be detected. By combining the multiple cross section images or the multiple lateral direction intensity profiles that are thus captured, an actual image of the shape of the original particle can be obtained.








 
 
  Recently Added Patents
Method for processing an image captured by an image sensor having a charge multiplication output channel and a charge sensing output channel
Multi-compartment container
Spindle device, machining center including the spindle device, and method for assembling the spindle device
System and method for securely storing firmware
Controller of vehicle drive unit
Surface heating type heating unit for fixing device, and fixing device and image forming apparatus including the same
Emulation in a secure regulated environment
  Randomly Featured Patents
Digital predistortion for amplifiers
Golf ball
Method and apparatus for the recording, processing, and reconstruction of a standard rate high-resolution video signal for real-time cardiovascular angiography and angioplasty procedures
Transfer belt unit and image forming apparatus using the same
Process for the preparation of 2-(4-chlorophenyl)-3-methylbutyric acid
Drive unit for watercraft
Hydraulic control system for a dual clutch transmission
Clock extraction circuit
Method of terminating roasting of bulk materials in real time on basis of objectively determined color of materials
Post-pass binary adaptation for software-based speculative precomputation