IMAGE PICKUP APPARATUS, IMAGE PICKUP SYSTEM, AND METHOD OF CONTROLLING THEM
First Claim
1. An image pickup apparatus comprising:
- a detector including a detection unit including a plurality of conversion elements each configured to convert radiation or light into an electric charge, a driving circuit configured to drive the detection unit to output an electric signal corresponding to the electric charge from the detection unit, a reading circuit configured to output the electric signal as image data, whereby the detector performs an image pickup operation to output the electric signal;
a power supply unit configured to supply a voltage to the conversion elements;
a temperature detection unit configured to detect a temperature of the detection unit; and
a calculation unit configured to calculate an amount of noise and an amount of afterimage that can be included in the electric signal or the image data in the image pickup operation, based on output characteristic information indicating a characteristic in terms of changes in amount of noise and amount of afterimage that can be included in the electric signal or the image data as a function of elapsed time since the supplying of the voltage is started, the temperature, the voltage, and an image pickup operation start time indicating a time elapsed since the supplying of the voltage from the power supply unit to the detection unit is started until the image pickup operation is started.
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Accused Products
Abstract
In an image pickup apparatus, a calculation unit calculates an amount of noise and an amount of afterimage that can be included in an electric signal or image data in an image pickup operation, based on output characteristic information indicating a manner in which the amount of noise and the amount of after image change as a function of an elapsed time since a voltage is applied to a detection unit, a temperature of the detection unit detected by a temperature detection unit, the voltage supplied to the conversion elements from a power supply unit, and an image pickup operation start time indicating a time elapsed since the supplying of the voltage to the detection unit is started until the image pickup operation is started to output the electric signal corresponding to an electric charge generated by the conversion element in the detection unit.
19 Citations
9 Claims
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1. An image pickup apparatus comprising:
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a detector including a detection unit including a plurality of conversion elements each configured to convert radiation or light into an electric charge, a driving circuit configured to drive the detection unit to output an electric signal corresponding to the electric charge from the detection unit, a reading circuit configured to output the electric signal as image data, whereby the detector performs an image pickup operation to output the electric signal; a power supply unit configured to supply a voltage to the conversion elements; a temperature detection unit configured to detect a temperature of the detection unit; and a calculation unit configured to calculate an amount of noise and an amount of afterimage that can be included in the electric signal or the image data in the image pickup operation, based on output characteristic information indicating a characteristic in terms of changes in amount of noise and amount of afterimage that can be included in the electric signal or the image data as a function of elapsed time since the supplying of the voltage is started, the temperature, the voltage, and an image pickup operation start time indicating a time elapsed since the supplying of the voltage from the power supply unit to the detection unit is started until the image pickup operation is started. - View Dependent Claims (2, 3, 4)
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- 5. The image pickup system according to claim 5, wherein using the output characteristic information, the temperature, the voltage, and a required amount of noise and a required amount of afterimage specified by the control computer, the calculation unit calculates a required image pickup operation start time indicating an image pickup operation start time required for the amount of noise and the amount of afterimage that can be included in the electric signal or the image data in the image pickup operation to satisfy the specified required amount of noise and the required amount of afterimage.
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7. A method of controlling an image pickup apparatus including a detector including a detection unit including a plurality of pixels each including a conversion element configured to convert radiation or light into an electric charge, a driving circuit configured to drive the detection unit to output an electric signal corresponding to the electric charge from the detection unit, a reading circuit configured to output the electric signal as image data, whereby the detector performs an image pickup operation to output the electric signal, and a power supply unit configured to supply a voltage to the conversion elements, the method comprising:
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detecting a temperature of the detection unit; and calculating an amount of noise and an amount of afterimage that can be included in the electric signal or the image data in the image pickup operation, using output characteristic information indicating a characteristic in terms of changes in amount of noise and amount of afterimage that can be included in the electric signal or the image data as a function of elapsed time since the supplying of the voltage is started, the temperature, the voltage, and an image pickup operation start time indicating a time elapsed since the supplying of the voltage from the power supply unit to the detection unit is started until the image pickup operation is started. - View Dependent Claims (8, 9)
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Specification