Apparatus and method for detection and characterization of particles using light scattered therefrom

Title: Apparatus and method for detection and characterization of particles using light scattered therefrom

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Abstract

Apparatus and method for detection and characterization of particles using light scattered therefrom. Differential phase measurements on scattered light from particles are possible using the two-frequency Zeeman effect laser which emits two frequencies of radiation 250 kHz apart. Excellent discrimination and reproducibility for various pure pollen and bacterial samples in suspension have been observed with a single polarization element. Additionally, a 250 kHz beat frequency was recorded from an individual particle traversing the focused output from the laser in a flow cytometer. 13 figs.

Inventors:: Johnston, R G

Issue Date:: 1987-03-23

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

OSTI Identifier:: 7092905

Patent Number(s):: 6028987

Assignee:: TIC; ERA-14-001884; EDB-88-187398

Patent Classifications (CPCs):: G - PHYSICS G06 - COMPUTING G06F - ELECTRIC DIGITAL DATA PROCESSING

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G - PHYSICS G06 - COMPUTING G06F - ELECTRIC DIGITAL DATA PROCESSING
G06F7/74 - Selecting or encoding within a word the position of one or more bits having a specified value, e.g. most or least significant one or zero detection, priority encoders {
G06F7/026 - {Magnitude comparison, i.e. determining the relative order of operands based on their numerical value, e.g. window comparator}
G06F7/544 - for evaluating functions by calculation {
G06F7/508 - using carry look-ahead circuits
G06F2207/5063 - 2-input gates, i.e. only using 2-input logical gates, e.g. binary carry look-ahead, e.g. Kogge-Stone or Ladner-Fischer adder

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DOE Contract Number:: W-7405-ENG-36

Resource Type:: Patent

Resource Relation:: Other Information: Portions of this document are illegible in microfiche products

Country of Publication:: United States

Language:: English

Subject:: 59 BASIC BIOLOGICAL SCIENCES; 47 OTHER INSTRUMENTATION; LASERS; PARTICLE DISCRIMINATION; BACTERIA; CYTOLOGY; DESIGN; INVENTIONS; POLLEN; BIOLOGY; GAMETES; GERM CELLS; MICROORGANISMS; PARTICLE IDENTIFICATION; 550700* - Microbiology; 440400 - Well Logging Instrumentation

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                    Johnston, R G. Apparatus and method for detection and characterization of particles using light scattered therefrom.  United States: N. p., 1987. 
        Web.

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                    Johnston, R G. Apparatus and method for detection and characterization of particles using light scattered therefrom.  United States.

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                    Johnston, R G. Mon .  
        "Apparatus and method for detection and characterization of particles using light scattered therefrom".  United States.

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@article{osti_7092905,

  title        = {Apparatus and method for detection and characterization of particles using light scattered therefrom},

  author       = {Johnston, R G},

  abstractNote = {Apparatus and method for detection and characterization of particles using light scattered therefrom. Differential phase measurements on scattered light from particles are possible using the two-frequency Zeeman effect laser which emits two frequencies of radiation 250 kHz apart. Excellent discrimination and reproducibility for various pure pollen and bacterial samples in suspension have been observed with a single polarization element. Additionally, a 250 kHz beat frequency was recorded from an individual particle traversing the focused output from the laser in a flow cytometer. 13 figs.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1987},

  month        = {3}

}

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