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(6). The detector (3) may be an array of galvomagnetic 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).
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Citations
9 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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Specification