Optics: measuring and testing – For optical fiber or waveguide inspection
Patent
1978-05-22
1979-12-04
McGraw, Vincent P.
Optics: measuring and testing
For optical fiber or waveguide inspection
250564, 356436, 356442, G01N 2126, G01N 2100
Patent
active
041769538
ABSTRACT:
A method and apparatus for measuring sperm motility are described in which a suspension of the sperm cells is placed in a transparent container, and a predetermined field of the specimen is continuously examined by photoelectric means for detecting variations in optical density caused by the collective wave-like motion of batches of the sperm cells through the examined field. An amplitude-modulated analog electrical signal is generated by the photoelectric means in response to the variations in optical density, and the peaks and valleys of this signal are counted over a predetermined time period to provide an index of sperm motility. This technique may be, and preferably is, performed on undiluted sperm suspensions as taken from the sperm-producing organism. In addition, it may be performed quickly, is non-destructive, and provides an objective index of motility which has been found to closely correlate with actual results.
REFERENCES:
"Objective Measurement of Sperm Motility;" Poultry Science; Wall et al.; vol. 52; pp. 657-660 (1973).
"Electronic Analyzer for Measuring Velocities & the Concentration of Spermatozoa;" Rev of Scit. Inst; vol. 35 #1, pp. 52-57; Jan. 1964; Rikmenspoel.
Bartoov Benjamin
Mayevsky Abraham
Mendel Shmuel
Oren Amiram
Barish Benjamin J.
McGraw Vincent P.
SEM Israel Limited
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