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US 4,762,412 AGranted
Optical scanning device
AssigneeShimadzu Corporation
InventorsKunihiko Ohkubo, Shunichiro Sasaki
Life of this patent
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Abstract
An optical scanning device, such as a chromatoscanner, includes a spectroscope having a rectangular outlet slit for producing a light beam in the shape thereof. A rotatable disk having a spiral slit is disposed in the path of the light beam to produce light pulses along radial lines of the disk which are directed to the surface of a specimen. The absorbancy of the light pulses at discrete positions of the specimen is measured and stored in a memory in accordance with the corresponding location on the specimen as derived from measuring the rotation angle of the disk.
Claims9
A chromatoscanner for scanning a specimen surface comprising:
- a spectroscope having an elongated outlet slit for producing a light beam in the elongate shape of said outlet slit;
- a rotatable disk having a slit therethrough beginning a selected distance from the center of said disk and extending to a point adjacent the periphery of the disk, said disk being mounted between said elongated outlet slit and the specimen and disposed to intersect said elongated beam of light, said slit being configured to pass a different portion of said elongated beam to scan the specimen upon rotation of said disk to rotate said slit through said elongated beam of light;
- means for rotating said disk, the position of said portion of said elongated beam passing through said slit changing relative to the center of said disk, upon angular rotation of said disk, to perform an individual scan of said specimen along a discrete scan path each time said slit rotates past said elongated outlet slit;
- means for generating absorbancy data for each of said individual scans of the specimen by measuring the degree of transmission of said light beam through the specimen along each of said discrete scan paths;
- position detecting means for producing position data corresponding to the position of each of said discrete scan paths by measuring the angle of rotation of said disk by said rotating means;
- memory means for storing said absorbancy data and said position data corresponding to each of said discrete scan paths;
- data reading control means for selecting a part of each individual scan path for which absorbancy data is read;
- and
- data reading means for reading said selected absorbancy data from said memory means in accordance with said position data stored in said memory means.
6 more elements
A chromatoscanner for scanning a specimen surface comprising:
- a spectroscope having an elongated outlet slit for producing a light beam in the elongate shape of said outlet slit;
- a rotatable disk having two or more spaced-apart slits therethrough beginning a selected distance from the center of said disk and extending to a point adjacent the periphery of said disk, said disk being mounted between said elongated outlet slit and the specimen and disposed to interesect said elongated beam of light, said spaced-apart slits being configured to pass a different portion of said elongated beam to scan the specimen upon rotation of said disk to rotate said spaced-apart slits through said elongated beam of light;
- means for rotating said disk, the position of said portion of said elongated beam passing through each of said spaced-apart slits changing relative to the center of said disk, upon angular rotation of said disk, to perform an individual scan of said specimen along a discrete scan path each time each of said spaced-apart slits rotates past said elongated outlet slit;
- means for generating absorbancy data for each of said individual scans of the specimen by measuring the degree of transmission of said light beam through the specimen along each of said discrete scan paths;
- position detecting means for producing position data corresponding to the position of each of said discrete scan paths by measuring the angle of rotation of said disk by said rotating means;
- memory means for storing said absorbancy data and said position data corresponding to each of said discrete scan paths;
- data reading control means for selecting a part of each individual scan path for which absorbancy data is read;
- and
- data reading means for reading said selected absorbancy data from said memory means in accordance with said position data stored in said memory means.
6 more elements
Dependencies are inferred from the claim text.