Magnetic scanning apparatus
First Claim
1. A magnetic scanning apparatus for scanning a specimen to obtain an image, the apparatus comprising:
- means for generating an excitation magnetic field in a region in which a specimen to be scanned may be placed,a detector for detecting a magnetic field originating from or modified by the specimen being scanned; and
means for nullifying the excitation magnetic field in the region of the detector, wherein the means for nullifying comprises a sheet of magnetic material.
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Accused Products
Abstract
Magnetic scanning apparatus including means for generating an excitation magnetic field 1 in a region in which a specimen to be scanned may be placed, a detector 3 for detecting a magnetic field originating from or modified by a specimen being scanned and a sheet of magnetic material 2 to nullify the excitation field in the region of the detector 3. The means for generating the excitation field 1 may be an array of permanent magnets 6. The detector 3 may be an array of galvom devices such as Hall Effect devices. A display 5 may be included in the detector. The display may include a number of pixels, one for each of the galvomagnetic devices of the detector 3.
12 Citations
11 Claims
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1. A magnetic scanning apparatus for scanning a specimen to obtain an image, the apparatus comprising:
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means for generating an excitation magnetic field in a region in which a specimen to be scanned may be placed, a detector for detecting a magnetic field originating from or modified by the specimen being scanned; and means for nullifying the excitation magnetic field in the region of the detector, wherein the means for nullifying comprises a sheet of magnetic material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A magnetic scanning apparatus for scanning a specimen to obtain an image, the apparatus comprising:
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means for generating an excitation magnetic field in a region in which a specimen to be scanned may be placed, a detector for detecting a magnetic field originating from or modified by the specimen being scanned; and means for nullifying the excitation magnetic field in the region of the detector, wherein the means for nullifying comprises a sheet of magnetic material, and wherein said means for generating an excitation magnetic field and said means for nullifying are spaced apart for receiving said specimen to be scanned therebetween.
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11. A magnetic scanning apparatus for scanning a specimen to obtain an image, the apparatus comprising:
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means for generating an excitation magnetic field in a region in which a specimen to be scanned may be placed, a detector for detecting a magnetic field originating from or modified by the specimen being scanned, means for nullifying the excitation magnetic field in the region of the detector, wherein the means for nullifying comprises a sheet of magnetic material, and wherein said means for generating an excitation magnetic field and said means for nullifying are spaced apart for receiving said specimen to be scanned therebetween; and a display operative to display an image derived from the magnetic field detected by the detector.
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Specification