Image sensing system and its control method
AssigneeCanon Kabushiki Kaisha
InventorsKoji Takahashi, Akihisa Horiuchi
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Abstract
In an image sensing system having an image sensing optical system, and an image sensing element for photoelectrically converting incoming light from the image sensing optical system, a predetermined pattern image for adjustment, which is specified in advance, is read by the image sensing element, and the image sensing element is driven to adjust its position on the basis of an output from said image sensing element, thereby adjusting the relative position of the image sensing element with respect to the image sensing optical system prior to an image sensing operation.
Claims13
An image sensing system comprising:
- an image sensing element for photoelectrically converting incoming light from an image sensing optical system into an image signal;
- one memory device provided in an image sensing unit for storing error information of the image sensing element and another memory device provided in the image sensing optical system for storing error information of the image sensing optical system, where the error information in the one memory includes an adjustment amount of the image sensing element and the error information in the another memory includes an adjustment amount of the image sensing optical system for a plurality of temperatures;
- one temperature detector provided in the image sensing unit for detecting temperatures of the image sensing element and another temperature detector provided in the image sensing optical system for detecting temperatures of the image sensing optical system;
- and
- an adjusting unit for adjusting a relative position of the image sensing element and the image sensing optical system based on the error information read from the one memory device and the another memory device associated with the temperatures of the respective image sensing element and the image sensing optical system detected by the respective one temperature detector and another temperature detector.
A method of controlling an image sensing system which comprises an image sensing element for photoelectrically converting incoming light from an image sensing optical system into an image signal, comprising:
- storing error information of the image sensing element in one memory device provided in an image sensing unit and storing error information of the image sensing optical system into another memory device provided in the image sensing optical system, where the error information in the one memory device includes an adjustment amount of the image sensing element and the error information in the another memory device includes an adjustment amount of the image sensing optical system for a plurality of temperatures;
- detecting temperatures of the image sensing element by one temperature detector provided in the image sensing unit and detecting temperatures of the image sensing optical system by another temperature detector provided in the image sensing optical system;
- and
- adjusting a relative position of the image sensing element and the image sensing optical system based on the error information stored at the storing step in the one memory device and stored at the storing step in the another memory device associated with the temperatures of the respective image sensing element and the image sensing optical system detected respectively at the detecting step by the one detector and at the detecting step by the another detector.
A computer readable medium having computer readable program code embodied in said medium configured to control an image sensing system which comprises an image sensing element for photoelectrically converting incoming light of a predetermined pattern from an image sensing optical system into an image signal, the program code comprising steps of:
- detecting temperatures of the image sensing element by one temperature detector provided in an image sensing unit and detecting temperatures of the image sensing optical system by another temperature detector provided in the image sensing optical system;
- storing error information of the image sensing element in one memory device provided in the image sensing unit and storing error information of the image sensing optical system into another memory device provided in the image sensing optical system, where the error information in the one memory device includes an adjustment amount of the image sensing element and the error information in the another memory device includes an adjustment amount of the image sensing optical system for a plurality of temperatures;
- and
- adjusting a relative position of the image sensing element and the image sensing optical system based on the error information stored at the storing step in the one memory device and stored at the storing step in the another memory device associated with the temperatures of the respective image sensing element and the image sensing optical system detected respectively at the detecting step by the one detector and at the detecting step by the another detector.
Dependencies are inferred from the claim text.