EP0265010A1
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EP
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Image pickup device
Assignee: Optische Industrie de Oude Delft NV
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Filing: 1987-10-12
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Granted: —
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Expires: 2007-10-12
Abstract
Abstract An image pickup device comprises a matrix of rows and columns of image pickup elements. Image information is transferred in the column direction in the time-delay-and-integration mode. Two shift registers are a ssociated with each column of image pickup elements. During a first period information from the image pickup elements of each column is transferred to a first one of each two shift registers associated with each column and during a second period information is transferred to the second one of each two shift registers associated with each column. Such an image pickup device can be used in radiography as a means for detecting x-ray radiation transmitted by a body under examination. In order to obtain a dual energy image a first or a second spectral centre point is periodically imparted to the x-ray radiation synchronously with the first and second periods.
Inventors
- 👤 Hendrik Mulder
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 21:17
CPC Classifications
H; H04; H04N; H04N25/00; H04N25/70; H04N25/71; H04N25/711; H04N25/40; H04N25/41; H04N25/713; H04N25/73
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
142 words
Image pickup device comprising a matrix having horizontal rows and vertical columns of image pickup elements, at least one vertical shift register associated with each column of image pickup elements, means for supplying clock signals to the matrix of image pickup elements and to the shift registers for transferring image information in the column direction in the time-delay-and-integration mode, and at least one horizontal shift register near the end of the vertical shift registers for reading out and transferring the image information, characterized in that two vertical shift registers are associated with each column of image pickup elements and in that means are provided for transferring the information from the image pickup elements to the first vertical shift register associated with each column during a first period and to the second vertical shift register associated with each column during a second period.
Claim 2
Dependent Claim
142 words
Image pickup device comprising a matrix having horizontal rows and vertical columns of image pickup elements, at least one vertical shift register associated with each column of image pickup elements, means for supplying clock signals to the matrix of image pickup elements and to the shift registers for transferring image information in the column direction in the time-delay-and-integration mode, and at least one horizontal shift register near the end of the vertical shift registers for reading out and transferring the image information, characterized in that two vertical shift registers are associated with each column of image pickup elements and in that means are provided for transferring the information from the image pickup elements to the first vertical shift register associated with each column during a first period and to the second vertical shift register associated with each column during a second period.
Claim 3
Dependent Claim
63 words
Image pickup device according to claim 1, characterized in that two horizontal shift registers are provided for reading out and transferring the image information, of which the first receives the information from the first shift register associated with each column of image pickup elements and the second receives the information from the second shift register associated with each column of image pickup elements.
Claim 4
Dependent Claim
23 words
Image pickup device according to claim 2, characterized in that the two horizontal shift registers are situated near one end of the columns.
Claim 5
Dependent Claim
79 words
Image pickup device according to at least one of the claims 1-3, characterized in that the ratio between the repetition frequency f TDI of the transfer of image information in the time-delay-and-integration mode and the frequency f hz with which image information is transferred either to the first or to the second shift register is given by f hz /f TDI = k/m, where k = 1,2,3... and m is the number of image pickup elements in a column.
Claim 6
Dependent Claim
73 words
Device for forming an x-ray image of a body under examination, provided with an x-ray radiation source, with means for periodically imparting a first or a second spectral centre point to the x-ray radiation beam radiated by said source, and with means for detecting x-ray radiation transmitted by the body, characterized in that the detection means comprise an image pickup device according to at least one of the claims 1 to 4 inclusive.
References Cited (Backward Citations)
US4383327A
Cited
US4455575A
Cited
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