EP0795769A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Imaging apparatus having an optical zoom lens and an electronic zoom circuit
Assignee: Hitachi Microcomputer System Ltd
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Filing: 1997-03-11
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Granted: —
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Expires: 2017-03-11
Abstract
Abstract Smooth interlocking operation of optical zooming means and electronic zooming means are realized by storing an amount of mechanical play of the optical zooming means to a play memory and then calculating the amount of mechanical play of the optical zooming from both such stored the amount of mechanical play and the lens drive control information to change the interlocking operation starting point of the optical zooming means and electronic zooming means.
Inventors
- 👤 Kazunori Uemura
- 👤 Takashi Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 20:04
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/10; G02B7/102; H; H04; H04N; H04N23/00; H04N23/60; H04N23/69
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
240 words
An imaging apparatus to form an image format on an imaging surface of a solid state imaging device via the predetermined optical system and outputting said image format after it is converted to a video signal, comprising: an optical zooming device for moving a zoom lens of said optical system along the optical axis and magnifying or reducing an image of an object formed on said imaging surface; an optical zooming controller for controlling said optical zooming device with an open loop; an electronic zooming device for magnifying and reducing an output image by outputting the image format on said imaging surface by changing an extracting size; a memory for storing an amount of mechanical play of said optical zooming device; a play calculator for calculating amount of mechanical play of said optical zooming means on the basis of the amount of play stored in said memory and the control result of said optical zooming controller, and an electronic zooming controller for controlling an output image of said electronic zooming device to continuously magnify and reduce the output image and changing the interlocking operation starting position so that the magnifying and reducing operations by said optical zooming device and that by said electronic zooming device are smoothly interlocked, in case of interlocking operation of said optical zooming device and said electronic zooming device, depending on the amount of mechanical play of said optical zooming device calculated by said play calculator.
Claim 2
Dependent Claim
50 words
An imaging apparatus according to claim 1, further comprising a temperature detector for detecting temperature of said optical zooming device and periphery thereof, wherein said play calculator compensates for the amount of mechanical play of said optical zooming device on the basis of the detection result of said temperature detector.
Claim 3
Dependent Claim
220 words
An imaging apparatus to form an image format on an imaging surface of a solid state imaging device via the predetermined optical system and outputting said image format after it is converted to a video signal, comprising: an optical zooming device for moving a zoom lens of said optical system along the optical axis and magnifying or reducing an image of object formed on said imaging surface; an electronic zooming device for magnifying and reducing an output image by outputting the image format on said imaging surface by changing an extracting size; an electronic zooming controller for controlling an output image of said electronic zooming device to continuously magnify and reduce; a memory for storing an amount of mechanical play of said optical zooming device; a play calculator for calculating an amount of mechanical play of said optical zooming device on the basis of the play stored in said memory and the control result of said optical zooming controller, and an optical zooming controller for controlling said optical zooming device with an open loop and previously operating said optical zooming device only for the period in which the amount of mechanical play of said optical zooming device calculated by said play calculator is canceled before start of the interlocking operation of said electronic zooming device and said optical zooming device.
Claim 4
Dependent Claim
50 words
An imaging apparatus according to claim 3, further comprising a temperature detector for detecting temperature of said optical zooming device and periphery thereof, wherein said play calculator compensates for an amount of mechanical play of said optical zooming device on the basis of the detection result of said temperature detector.
Claim 5
Dependent Claim
207 words
An imaging apparatus for detecting an image format focused on the imaging surface of an imaging device by an optical system into the predetermined video signal and then outputting the same video signal, comprising: a signal processor for outputting said video signal of a part or all of the output video signal on said imaging surface by electrically processing an output signal of said imaging device; an optical zooming mechanism for changing magnification of said image format by mechanically moving the zoom lens provided in said optical system; a play detector for detecting mechanical play generated in said optical zooming mechanism; and a controller for controlling said signal processor to magnify and reduce output image format of said video signal outputted from said signal processor, changing the image format of said video signal by controlling said optical zooming device with the open loop and changing, in case of interlocking operation of said optical zooming mechanism and said signal processor, the operation period of said signal processor and said control optical zooming mechanism depending on the amount of play detected by said play detector so that a change of image format by said optical zooming mechanism is smoothly continued to change of image format by said signal processor.
Claim 6
Dependent Claim
45 words
An imaging apparatus according to claim 5, further comprising a temperature detector for detecting temperature of said optical zooming device and periphery thereof, wherein said play detector compensates for an amount of said play on the basis of the detection result of said temperature detector.
References Cited (Backward Citations)
JPH04253014A
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EP0579165A1
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JPH06165015A
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EP0608099A1
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