摘要:
The apparatus of the present invention is provided with flashing device for effecting preliminary flashing and main flashing, a split photometry unit for metering reflected light from the area of the object field divided into a plurality of areas and outputting a photometric output for each of these areas, preliminary flashing control unit, a calculation unit and a main flashing control unit. The preliminary flashing control unit causes the flashing device to effect preliminary flashing prior to main flashing, and when in that case, at least one of the photometric outputs from the split photometry unit reaches a predetermined value, causes the flashing device to repeat the preliminary flashing while decreasing the quantity of emitted light thereof, and when the photometric outputs become null before the predetermined value is reached, causes the flashing device to stop the preliminary flashing. The calculation unit determines the divided areas which are not used for the flash limiting during the main flashing by the use of the photometric outputs and the quantity of emitted light during preliminary flashing at the last stage. The main flashing control unit controls the main flashing of the flashing device on the basis of the output of the calculation unit.
摘要:
A camera body to which a photographing lens storing data associated with a full-aperture value and data associated with a position of an exit pupil can be attached, includes an optical member for scattering radiation from the photographing lens, light-receiving element, and a photometric optical system for guiding the radiation from the photographing lens through the optical member toward the light-receiving element. The optical member is arranged on a side opposite to an object with respect to the photographing lens. The light-receiving element generates an output according to the radiation incident from the photometric optical system. The camera body further includes a correction circuit for reading out the data associated with the full-aperture value and the position of the exit pupil, calculating a correction amount based on the readout data, and correcting the output from the light-receiving element based on the calculated correction amount, and an exposure control circuit for performing exposure control based on the corrected output.
摘要:
A camera includes producing means for detecting the state of the luminance of the object field and producing a luminance information signal conforming to the detected state of the luminance of the object field, control means for calculating the exposure value for exposure of a film on the basis of the luminance information signal and performing the exposing operation of the film, setting means for setting a comparative level on the basis of the luminance information signal, flash emitting means for emitting flash toward the object field in response to the start of the exposing operation by the control means, means for calculating the integrated value of at least a part of the light from the object field at any time in response to the start of the exposing operation by the control means, and stop means for detecting that the integrated value and the comparative level have assumed a predetermined relation and stopping the flash emitting operation of the flash emitting means.
摘要:
A camera includes producing means for detecting the state of the luminance of the object field and producing a luminance information signal conforming to the detected state of the luminance of the object field, control means for calculating the exposure value for exposure of a film on the basis of the luminance information signal and performing the exposing operation of the film, setting means for setting a comparative level on the basis of the luminance information signal, flash emitting means for emitting flash toward the object field in response to the start of the exposing operation by the control means, means for calculating the integrated value of at least a part of the light from the object field at any time in response to the start of the exposing operation by the control means, and stop means for detecting that the integrated value and the comparative level have assumed a predetermined relation and stopping the flash emitting operation of the flash emitting means.
摘要:
A surface-wave driven motor comprises a moving member for being displaced, a resilient member having a surface urged against the moving member, a piezo-electric member provided in contact with the resilient member to impart vibration to the resilient member and create an elastic wave in the surface, means having electrode means provided on the piezo-electric member and applying an AC voltage to the piezo-electric member through the electrode means, means for detecting an electrical output produced in the piezo-electric member from an area on the piezo-electric member which is electrically insulated from the electrode means, and means for determining the frequency of the AC voltage on the basis of the detected electrical output.
摘要:
A starter system for a hot internal combustion engine, the starter system including a first valve which opens upon starting of the engine in a heated state to permit supplemental air to be drawn into the engine intake passage to dilute the air-fuel mixture therein, and a second valve down stream of the first valve arranged to cut off supplemental air flow as vacuum pressure corresponding to complete firing of the engine develops in the intake passage.
摘要:
An ultrasonic motor has a vibrator for vibrating with a first vibration mode and a second vibration mode for vibration in a direction different from that of the first vibration mode; a relatively movable member for executing relative vibration in accordance with the vibration of the vibrator; and a drive control device for controlling the vibrator within a range higher than, among resonance frequencies of the first and second vibration modes, a higher resonance frequency.
摘要:
A miniaturized ultrasonic motor comprises a stator having an elastic body on which a travelling oscillatory wave is generated and which is supported on a fixing unit in a manner that prevents rotation of the elastic body but permits axial movement of the elastic body. The travelling oscillatory wave rotates a rotor that contacts protruding portions of the elastic body, and the rotor rotates a driven body therewith. The driven body engages the rotor in a manner that constrains the driven body to rotate with the rotor but that permits relative axial movement of the driven body and the rotor body.
摘要:
A camera includes a photo-taking lens, an automatic focus adjusting device for effecting the automatic focus adjustment of the photo-taking lens, an eye-gaze detecting device for detecting the photographer's eye-gaze position in a finder field corresponding to a photographing picture plane, and producing an eye-gaze detection signal corresponding to the eye-gaze position, a focus adjustment signal producing device for outputting a plurality of focus adjustment signals corresponding to a plurality of detection areas in the photographing picture plane, and a control signal producing device for producing a control signal for controlling the automatic focus adjusting means, on the basis of the eye-gaze detection signal and the focus adjustment signals. The control signal producing device produces the control signal on the basis of the plurality of focus adjustment signals corresponding to the plurality of detection areas when the eye-gaze position indicated by the eye-gaze detection signal is at a position between the plurality of detection areas.
摘要:
An automatic exposure device in a camera divides an object field into a plurality of areas and photometers them by the use of a divisional photometry element, and calculates optimum exposure from the result of the photometry. The divisional photometry element includes a photometric converting portion for photoelectrically converting incident light in each of the areas and putting out an output, and a reading portion for reading out the plurality of outputs of the photoelectric converting portion. When the number of successive outputs of a row of the areas in the readout direction which exceed a predetermined value is greater than a predetermined number, the output of that row is completely omitted in the calculation of the optimum exposure.