Claims
- 1. An apparatus capable of quantitative magnetic measurement of samples, each sample arranged in a predefined pattern and disposed in a sample holder, comprising:
a magnetic field source to apply a magnetic field to the sample, the magnetic field source defining a gap in which a sample holder is movably disposed; a substantially flat magnetic field sensor to sense an induced magnetic moment from the sample and configured and arranged in a gradiometer configuration to substantially eliminate the contribution of the magnetic field source to the sensing, the magnetic field sensor having a sensing area substantially the same as the extent of each sample, the magnetic field sensor having an output to communicate output signals, the magnetic field sensor disposed substantially within the gap of the magnetic field source.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This is a continuation application of U.S. patent application Ser. No. 09/911,934 filed on Jul. 23, 2001, entitled “Method And Apparatus For Making Measurements Of Patterns Of Magnetic Particles In Lateral Flow Membranes And Microfluidic Systems” which is a divisional patent application of U.S. patent application Ser. No. 09/451,660 filed on Nov. 30, 1999, now U.S. Pat. No. 6,437,563 entitled “Method and Apparatus for Making Measurements of Accumulations of Magnetic Particles”, which is a continuation-in-part patent application of U.S. patent application Ser. No. 08/975,569 filed on Nov. 21, 1997, now U.S. Pat. No. 6,046,585 entitled “Method and Apparatus for Making Quantitative Measurements of Localized Accumulations of Targets Particles Having Magnetic Particles Bound Thereto”.
Divisions (1)
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Number |
Date |
Country |
Parent |
09451660 |
Nov 1999 |
US |
Child |
09911934 |
Jul 2001 |
US |
Continuations (1)
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Number |
Date |
Country |
Parent |
09911934 |
Jul 2001 |
US |
Child |
10625720 |
Jul 2003 |
US |
Continuation in Parts (1)
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Number |
Date |
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Parent |
08975569 |
Nov 1997 |
US |
Child |
09451660 |
Nov 1999 |
US |