Abstract: An automatic focus adjustment device and method is used after focussing a shooting lens so as to maintain both stability and focussing precision. Shooting lens defocus amounts are calculated based on focus state detection signals repeatedly output from an electric charge type photosensitive device that receives light rays from a subject. Focus adjustment is accomplished until the shooting lens is in the predetermined focussing state based on these defocus amounts. After the shooting lens has reached the predetermined focussing state, the calculated defocus amounts are statistically processed. The determination to resume focus adjustment of the shooting lens is made based on this processing.

Abstract: A camera exposure control device reduces battery power consumption during film exposure at the picture shooting time for long exposure times greater than several seconds such as bulb shooting and time shooting. The camera exposure control device includes a power source line from a battery power source to a control device and the like. A DC/DC converter is also on the power line. The control device stops operation of the DC/DC converter during the long exposure time where the shutter time is longer than a predetermined time. In other words, the control device controls the operation of the DC/DC converter during film exposure at shooting times where the film exposure time is longer than several seconds. The control device interrupts the DC/DC converter during these long exposure times. Further, other electric parts such as IC's and devices that do not require electricity supplied during the long exposure times can be turned off by the control device.

Abstract: An auto-focusing device for stably driving a photographing lens to track a moving object comprises a charge accumulation type photo-electric conversion device for accumulating charges at a predetermined time interval to produce a focus detection signal, a defocus amount calculation device for calculating a defocus amount of the photographing lens based on the focus detection signal, a drive distance calculation device for calculating a direction and a distance of the lens drive for driving the photographing lens to track the moving object based on at least the defocus amount, a drive device for driving the photographing lens in accordance with the calculated direction and distance of the lens drive, and a control device for supplying the direction and distance of the lens drive calculated by the drive distance calculation device to the drive device after the end of the next charge accumulation by the photo-electric conversion device to drive the photographing lens so that the photographing lens tracks the mov

Abstract: This focus detection device uses electric charge accumulation type photoelectric conversion devices. The time period for the next episode of electric charge accumulation by these photoelectric conversion devices is calculated based upon the time period for the current episode of electric charge accumulation, so as to keep the maximum level of an electrical signal for focus detection output from the photoelectric conversion devices less than or equal to a previously determined target level. The accumulation of electric charge by the photoelectric conversion devices is then performed according to this calculated electric charge accumulation time period, and the resultant electrical signal for focus detection is output.

Abstract: An automatic focus adjustment apparatus includes a focus detection unit for detecting a distance along the optical axis between an object image plane and a prospective focal plane of a photographing lens at a predetermined time interval, a moving amount detection unit for detecting a moving amount of the photographing lens, an image plane speed calculation unit for calculating a moving speed of the object image plane, a focusing position calculation unit for calculating a focusing position of the photographing lens where the object image plane is caused to coincide with the prospective focal plane a position detection unit for detecting a current position of the photographing lens, a position control unit for controlling the position of the photographing lens, a speed control unit for determining a control amount for controlling the moving speed of the photographing lens, and a driving unit for driving the photographing lens according to the control amount determined by the speed control unit.

Abstract: A focal point detection apparatus comprising: a plurality of charge storage type light sensing portions for sectioning an image photographing surface including a subject into a plurality of focal point detection areas to receive light from each focal point detection area so that charge is stored; a transfer device for converting the charge stored in each of the light sensing portions into an electric signal so as to transfer it to the a focus point detection device; and a control device for controlling commencement and completion of the charge storage in each of the light sensing portions for the purpose of causing the transfer device to transfer a plurality of the charges in a predetermined order in such a manner that the next charge is transferred after the previous order charge has been transferred.

Abstract: An electromagnetically operated fixed displacement pump is sought, which can cope with diversification of electromagnetically operated fixed displacement pump products, and internationalization of their destination, readily permits cost reduction by mass production and permits efficient supply and control of products. A terminal portion electrically connected to the electromagnetic coil projects from the top of the pump body. A control unit with a control section for controlling the stroke number is removably mounted on the terminal unit. The pump body is supplied with current from lead pins of a power source connector provided on the control unit through the terminal portion. The control unit is prepared according to the specifications of various pump products. Various control units thus can be replaceably mounted on the terminal portion with the pump body as a common component. It is thus possible to provide pump products meeting various specifications.

Abstract: An auto-focusing device for stably drive a photographing lens to track a moving object comprises charge accumulation type photo-electric conversion means for accumulating charges at a predetermined time interval to produce a focus detection signal, defocus amount calculation means for calculating a defocus amount of the photographing lens based on the focus detection signal, drive distance calculation means for calculating a direction and a distance of the lens drive for driving the photographing lens to track the moving object based on at least the defocus amount, drive means for driving the photographing lens in accordance with the calculated direction and distance of the lens drive, and control means for supplying the direction and distance of the lens drive calculated by the drive distance calculation means to the drive means after the end of the next charge accumulation by the photo-electric conversion means to drive the photographing lens so that the photographing lens tracks the moving object.

Abstract: There is provided an automatic focusing device of a camera which accurately adjusts focus in a short time on the basis of recent and past information created in accordance with a focused object. The position of the object is predicted on the basis of the recent information and past information calculated at predetermined time intervals. It is therefore possible to accurately predict the position of the object in a short calculation time and to reliably determine whether the object is at rest or in motion. During a servo operation, a tracking servo operation does not begin erroneously for an object at rest. Once the tracking servo operation begins, because of hysteresis for determining whether the object is moving, the lens continuously and stably tracks the object. During the tracking servo operation, there is no delay of the time intervals at which the distance between the lens and the object is measured, and a distance moved by the object can be corrected and automatically adjusted.

Abstract: An auto-focusing apparatus adjusts focus of a photographing lens based on the focus detection in accordance with object image signals in an overflow of a portion of the signals is within a permissible level so that a delay time in the lens drive is shortened and the operability is improved.

Abstract: A plastic film or coated paper has a hydrophilic colloid layer thereon comprising particles with the average particle size of 0.5 to 20.mu. coated with a water-repellent material. The water-repellent material is selected from the group consisting of silicone, a silane compound, a fluorine-containing compound and a silane coupling agent. A silver halide photographic light-sensitive material comprises a hydrophilic colloid layer comprising particles with the average particle size of 0.5 to 20.mu. coated with a water-repellent material.

Abstract: An automatic focusing apparatus includes a focus detection unit for repeatedly calculating the amount of defocus corresponding to the difference between a surface of a subject image imaged by a taking optical system and a prospective image surface of this system, an image surface speed calculation unit for calculating the speed at which the subject image surface is moved with the movement of the subject based on the amounts of defocus calculated at different times, and a drive control unit for driving and controlling the taking optical system based on the amount of defocus and the subject image surface moving speed calculated.

Abstract: According to the method of the present invention, in an overlap servo auto focus system wherein the accumulation by a charge accumulation type sensor for obtaining the defocus amount of a lens, the calculation of the defocus amount based thereon and the driving of the lens under servo control conforming to the calculated defocus amount are effected at a time in an overlapping manner, design is made such that in-focus judgment is not done when the amount of lens driving during the accumulation time of the charge accumulation type sensor is greater than a predetermined threshold value. In a modification, design is made such that in-focus judgment is not done when the amount of lens driving during the time from the start of the accumulation by the charge accumulation type sensor till the calculation of the defocus amount is greater than a predetermined threshold value.

Abstract: An improved silver halide photographic material that has at least one silver halide emulsion layer on a support and that contains a hydrazine derivative in said emulsion layer or an adjacent layer. The improvement is that said emulsion layer or at least one of the other hydrophilic colloidal layers contains at least one of the compounds represented by the following general formulas (I) and (II): ##STR1## wherein R.sub.1 and R.sub.1 ' are each a group selected from among a substituted or unsubstituted alkane residue, an alkene residue, a benzene residue, a cyclohexane residue and a nitrogenous heterocyclic residue; R.sub.2 is a substituted or unsubstituted alkyl group; R.sub.3, R.sub.3 ', R.sub.4 and R.sub.4 ' are each a hydrogen atom or a substituted or unsubstituted methyl group, provided that R.sub.3 and R.sub.4 or R.sub.

Abstract: A dynamic servo-controlled auto-focusing system for a camera lens, in which range finding and lens driving operations overlap, comprises a light receiving element or a charge storage sensor, a computing element for computing defocus information corresponding to a postional relation between a subject image and a predetermined plane by processing output data of the light receiving element, a driving element for servoing the camera lens to a focused position according to information from the computing element, and a lens movement detecting element for detecting movement of the camera lens in real time. In a preferred mode of operation, the equivalent lens position for the range finding portion of each cycle is determined on a time-weighted mean basis.

Abstract: A silver halide photographic light-sensitive material suitable for photomechanical process is disclosed. The light-sensitive material comprises a support and a silver halide emulsion layer and the emulsion layer or a layer adjacent to the emulsion layer contains a compound represented by formula 1, 2 or 3 and a compound represented by formula 4 or 5. ##STR1## The light-sensitive material give extreme high contrast images by processing usung a stable developer and is inhibited from producing pepper fog.

Abstract: A drive controlling apparatus for controlling movement of a movable member having a mechanically limited range of movement, comprises a drive device for driving the movable member, a feedback pulse generator for detecting the movement of the movable member and for outputting a number of pulse signals corresponding to an amount of the movement of the movable member, a main timer for measuring the period of the pulse signals, and for outputting a signal when a measured time period coincides with one of a plurality of comparison values, a sub timer for measuring one or more time periods from the start of the drive device to the steady state of the drive device and for changing the plurality of comparison values successively, and a control circuit for stopping the drive device in response to the signal outputted from the main timer.

Abstract: A camera having a continuous photographing mode in which an exposure operation and a one frame-wind-up operation of a film are repeatedly carried out, comprising RAM, CCD, A/D convertor, a motor, encoder and AF lens control device. The CCD and A/D convertor detect a defocus distance of a photographing lens and form a data representing the detected defocus distance and store said data in the RAM. The motor drives the photographing lens. The encoder detects a driven distance of the photographing lens driven by the motor to generate a detection signal and the motor drives the photographing lens such that the drive distance represented by the detection signal coincides with the defocus distance represented by the data of the RAM. The AF lens control device discontinues the drive of the photographing lens by the motor prior to the start of the exposure operation in the continuous photographing mode and resumes the drive in the period of a subsequent one-frame wind-up operation.

Abstract: In an automatic focusing apparatus, wherein first zone representing an in-focus condition and a second zone for sufficiently assuring detection precision of the automatic focusing apparatus are provided for the position of a focusing lens, the focusing lens is driven on the basis of a defocus amount when the defocus amount falls within the range between the first and second zones, and thereafter an in-focus signal is output upon driving of the focusing lens, thereby shortening a delay time from the end of driving of the photographing lens to generation of the in-focus signal.

Abstract: A control apparatus for camera, comprises driving means comprising an electric motor, a circuit means for controlling the motor and a rotary shaft rotationally driven by the motor. The rotation of the rotary shaft includes a first rotation in a direction started in response to a picture-taking starting operation, a second rotation in a second direction started in response to the completion of an exposure and a third rotation in the second direction subsequent to the second rotation.