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公开(公告)号：CA1332637C
公开(公告)日：1994-10-18
申请号：CA592485
申请日：1989-03-01
Applicant: SONY CORP
Inventor： IWAMOTO KOJI , HAMADA KENICHI
Abstract: A focus control system for a video camera determines a first gradient indicative of a change in value of a predetermined frequency component in the video signal for first and second positions obtained from the signal of predetermined frequency component in the video signal sampled at the first lens position and at the second lens position, and determines a second gradient indicative of a change in value of the predetermined frequency component in the video signal for second and third lens positions obtained from the signal of the predetermined frequency component in the video signal sampled at the third lens position point, and the speed of longitudinal movement of the lens is controlled in accordance with changes in the first and second gradients, thereby permitting faster focusing and reducing the amount of overrun of the lens during such focusing.
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公开(公告)号：CA1339786C
公开(公告)日：1998-03-31
申请号：CA616749
申请日：1993-09-30
Applicant: SONY CORP
Inventor： IWAMOTO KOJI , HAMADA KENICHI
Abstract: A method of focus control for a video camera comprises the steps of detecting the maximum value of a luminance component in an image pickup signal; and adjusting a rotating position of a focusing ring of an image pickup lens on the basis of the result of the detection, including the further steps, when said maximum value is detected, of rotating said focusing ring for driving same at a low speed for a predetermined time to discriminate an increasing direction of the luminance component from a start point and, thereafter, until said luminance component exceeds a predetermined level, rotating the focusing ring at a high speed, and rotating the focusing ring at a low speed when said level is set to at least the predetermined level, thereby permitting faster focusing and reducing the amount of overrun of the lens during such focusing.
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公开(公告)号：ES2072894T3
公开(公告)日：1995-08-01
申请号：ES89302118
申请日：1989-03-03
Applicant: SONY CORP
Inventor： IWAMOTO KOJI , HAMADA KENICHI , HIROTA KATSUAKI
IPC: H04N5/232
Abstract: A focus control system for a video camera determines a first gradient ( theta 0) indicative of a change in value of a predetermined frequency component in the video signal for first and second lens positions (lm, lm+1) obtained from the signal of predetermined frequency component in the video signal sampled at the first lens position (lm) and at the second lens position (lm+1), and determines a second gradient ( theta 1) indicative of a change in value of the predetermined frequency component in the video signal for the second lens position (lm+1) and a third lens position (lm+2) obtained from the signal of the predetermined frequency component in the video signal sampled at the third lens position (lm+2). The speed of longitudinal movement of the lens is controlled in accordance with changes in the first and second gradients ( theta 0, theta 1), thereby permitting faster focusing and reducing the amount of overrun of the lens during focusing.
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公开(公告)号：JPH09138337A
公开(公告)日：1997-05-27
申请号：JP31857295
申请日：1995-11-13
Applicant: SONY CORP
Inventor： NAGASHIMA TOSHIRO , HAMADA KENICHI , OKAJIMA KOJI , HIRANO KENJI
Abstract: PROBLEM TO BE SOLVED: To simplify a constitution, to make a camera small in size and light in weight by respectively moving a first lens group and a second lens group along a zoom tracking curve in the lens system of a two-group constitution. SOLUTION: A lens barrel 1 is provided with a first lens group 2 and a second lens group 3. A microcomputer 6 possesses a memory where the zoom tracking curve is previously stored. The zoom tracking curve shows the moving loci of two lens groups 2 and 3 focusing at image pickup scenes for each zooming magnification at a constant object distance at respective positions, and plural zoom tracking curves are calculated for plural specified object distances at the time of designing the lens system. The lens groups 2 and 3 are respectively controlled by the microcomputer 6 so as to move along each zoom tracking curve of a specified object distance selected by a zooming position memory 7 and a focusing position memory 8.
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公开(公告)号：JPH08265627A
公开(公告)日：1996-10-11
申请号：JP8734795
申请日：1995-03-20
Applicant: SONY CORP
Inventor： OKAWA ATSUSHI , NAKAYAMA AKIHITO , OSHIMA EIJI , HAMADA KENICHI
Abstract: PURPOSE: To provide the camera unit in which an image pickup object is quickly switched by arranging a reflecting member to switch an object area. CONSTITUTION: This camera unit 11 is made up of a lens unit 11a, an image pickup means such as a CCD arranged to an image forming position of the lens unit 11a, and a mirror 12. The mirror 12 is rocked from its escaping position till its inserted position by a rotary shaft 12a provided to a front side upper part of the camera unit 11. The mirror 12 is driven around the rotary shaft 12a by a driver 15 and its angle is adjusted. When the mirror 12 is located at its inserting position, a light of a sample located on a sample placing board is led to the camera unit 11 via the mirror 12 and its image is formed on a light receiving face of the image pickup means. When the mirror 12 is in the escaping position, the object in front of the lens unit 11a is picked up.
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Patent Agency Ranking
公开(公告)号：JPH04360378A
公开(公告)日：1992-12-14
申请号：JP16108691
申请日：1991-06-05
Applicant: SONY CORP
Inventor： FUJIKAWA TATSUO , HIROTA KATSUAKI , KOYANAGI MASAKAZU , HAMADA KENICHI
Abstract: PURPOSE:To shorten the time required for flange back adjustment in a video camera employing an inner focus lens. CONSTITUTION:A position of a telescopic end is adjusted by moving a variator 2 between a position of an inflection point and the position of the telescopic end, and after the position of the telescopic end is adjusted, a focus lens 4 is moved by a specified quantity to obtain a position at a wide end. Since the variator 2 is reciprocated between the position of the inflection point and the position at the telescopic end, the adjustment time is reduced.
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公开(公告)号：JPH01226281A
公开(公告)日：1989-09-08
申请号：JP5129488
申请日：1988-03-04
Applicant: SONY CORP
Inventor： IWAMOTO KOJI , HAMADA KENICHI
Abstract: PURPOSE:To perform mountain climbing control at high speed by setting the rotational speed of a driving motor 2 according to the ratio of the inclination of a curve to show relation between the change of a lens position in the continuous lens position and the change of evaluation value data. CONSTITUTION:The rotational speed of the driving motor 2 is controlled according to the curve to show the relation between the change of lens position and the change of the evaluation value data. Namely, when the lens position is apart from the maximum value of the evaluation value data, the driving motor 2 is rotated at high speed, and when the lens position approaches to the maximum value of the evaluation value data, the speed of the driving motor 2 is retarded. Thus, the mountain climbing control can be performed at high speed, and simultaneously, overrun quantity at the time of detecting that the lens position passes over the maximum value of the evaluation value data on account of the mountain climbing control can be made minimum.
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公开(公告)号：JPS62247314A
公开(公告)日：1987-10-28
申请号：JP9192186
申请日：1986-04-21
Applicant: SONY CORP
Inventor： FUJIKAWA TATSUO , HAMADA KENICHI
Abstract: PURPOSE:To eliminate the need for conventional movable parts and to improve reliability by providing two faces shifted longitudinally in the direction of optical axis on the image forming face of an image pickup element and making automatic focus control utilizing the difference of contrast of the two faces. CONSTITUTION:Constitutional elements of image forming face at the center 11 of the image forming face are provided in unit of one horizontal line shifting longitudinally in the direction of optical axis. The image pickup output from a CCD image pickup element 13 is supplied to a sampling gate circuits 14F and 14B. On the other hand, a gate signal generating circuit 15 is provided, and the image pickup output from the constitutional element 12F of the line is obtained from the gate circuit 12F, and the image pickup output from the constitutional element 12B of the line is obtained from the gate circuit 14B, and supplied respectively to contrast detecting circuits 16F and 16B. The difference of contrast is found by a comparator circuit 17, and the output of the difference is supplied to a focus controlling circuit 18, and the output of the circuit 18 is supplied to a motor for driving a focus ring.
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公开(公告)号：JPH11331859A
公开(公告)日：1999-11-30
申请号：JP12903398
申请日：1998-05-12
Applicant: SONY CORP
Inventor： SHIMIZU HIDEJI , HAMADA KENICHI , YOSHIOKA HIROSHI
Abstract: PROBLEM TO BE SOLVED: To realize video image photographing and the recording of a video signal for a short time with a small-scale and inexpensive system configuration. SOLUTION: In this signal processing method, a video signal S10 from a CCD section 10 is converted into a digital signal S30, a signal processing circuit 40 separates the digital signal into a luminance signal Y and color difference signals Cr, Cb, and they are stored in a memory 70, for example, by frame under the control of a memory control circuit 60. A selection circuit provided in the signal processing circuit 40 selects luminance and color difference signals read from the memory 70 or luminance and color difference signals obtained by separating the signal S30, a D/A converter circuit converts the selected signals into analog signals and composite video signals are composed and outputted. Thus, the digital video signal by a prescribed time in response to the storage capacity of the memory 70 is recorded and the video signal for a short time is recorded.
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公开(公告)号：JPH0263274A
公开(公告)日：1990-03-02
申请号：JP21435488
申请日：1988-08-29
Applicant: SONY CORP
Inventor： HIROTA KATSUAKI , HAMADA KENICHI , YOSHIDA MASANOBU , IWAMURA RYUICHI , SENUMA KIYOKO , IWAMOTO KOJI
Abstract: PURPOSE:To attain accurate focus discrimination quickly by applying focus control so that the integration value of the luminance component of the 1st frequency band extracted from an image pickup signal is a maximum value and discriminating whether or not an integration value of the luminance component in the 2nd frequency band in the 1st frequency band exceeds a prescribed level thereby discriminating the focusing state. CONSTITUTION:A central controller 12 applies focus control so that the integration value by an integration circuit 11 for the luminance component in the 1st frequency band depending on the 1st high pass filter 6a and a low pass filter 9 is a maximum value. Then the central controller 12 discriminates whether or not the integration value by the integration circuit 11 for the luminance component in the 2nd frequency band depending on the 2nd high pass filter 6b and the low pass filter 9 in the 1st frequency band exceeds a prescribed level to apply the focus discrimination. Thus, whether or not the focal state is consecutive is discriminated quickly and accurately without turning a focus ring.
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