Accession Number : ADD004362

Title :   Frequency Domain Discrimination and Counting Technique.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Atkinson,E Ronald

Report Date : 16 Aug 1977

Pagination or Media Count : 7

Abstract : An apparatus and method for counting the number of objects-of-interest present in a selected sample by scanning the sample with a rotating reticle of preselected design to measure the spatial frequency components in the field-of-view, which components are definitive of the number of objects-of-interest present. The spacing within the reticle pattern determines the size of the objects that will be counted. The invention has significant application as a means for counting bone marrow granulocyte precursor colonies in the detection and treatment of leukemia. (Author)

Descriptors :   *Patents, *Counters, *Frequency analyzers, Optical scanning, Reticles, Disks

Subject Categories : Electrical and Electronic Equipment
      Test Facilities, Equipment and Methods
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE