The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 22, 1986
Filed:
May. 24, 1983
James K Woolhouse, Chedworth, Hamilton, NZ;
Murray W Woolford, Hillcrest, Hamilton, NZ;
Other;
Abstract
A micro-sample of semen is exposed to a beam of light from an inexpensive and small laser device. Light scattered by the sample is detected by a photodetector. The photodetector signal is analyzed in the frequency domain to provide a measure of the amplitude of the signal components having frequencies above about 100 Hz. This measure is representative of the numbers of motile sperm in the sample. A motile/immotile percentage is obtained by dividing the motile measurement by a value representative of the amplitude of the full-frequency photodetector signal. In a preferred embodiment frequency-amplitude analysis is carried out in the time domain using frequency splitting filters and integrating the filtered signals. The light receiving aperture for the photodetector is made annular or part-annular in shape to overcome sample orientation or polarization effects.