摘要:
A camera distance measuring device in which center, left and right peripheral beams for illuminating a subject are emitted from the center, left and right infrared-emitting diodes, respectively. First and second intermediate electrodes are provided between a pair of electrodes of a position sensitive device. An arithmetic circuit calculates center, left and right distance data from a composite output of a plurality of amplifiers delivered synchronously with each of the center, left and right peripheral beams incident on the position sensitive device.
摘要:
A circuit for detecting back light comprises a time constant circuit including a capacitor selectively connectable in series with either a resistive element, or one of two CdS photoconductive elements used to measure the central and surrounding portions, respectively, of an object being photographed. Three switches separately conect the resistive element and the two photoconductive elements in series with the capacitor. A circuit generates pulses for a length of time governed by a time constant determined by the time constant circuit, and three separate counters store the pulses the number of which is determined by the time constant. An arithmetic circuit processes the pulses stored in the counters to determine the amount of back light present on the object.
摘要:
A device which includes means for detecting a film sensitivity code based upon International Standardization Organization and provided on a film cartridge when the film cartridge is loaded, whereby it is determined whether or not a film is one whose cartridge has a code provided thereon by adding 1 to the film sensitivity code detected the means to detect if a carry-over appears or not.
摘要:
In a program shutter including a forwardly/reversely rotatable step motor for opening and closing a shutter blade to effect automatic exposure, a drive pulse number and an interpolation quantity are set in first and second counters. A step drive pulse is generated by the first counter to start opening the sectors. After a final pulse is generated, the second counter is started, and at the timing when the time corresponding to the interpolation quantity is elapsed, the step motor is reversely rotated thereby to fractionate a gap between steps and obtain a proper exposure quantity.
摘要:
A device for detecting coincident focusing points for use in the controlling of the focusing of an automatically focusable lens comprises a single array of light receiving transducers for converting the distribution of light intensity of an image applied thereon to a set of corresponding electrical signals. The image applied to the array is from a first optical path from an object through the lens and from a second optical path from the object. At least one shutter is provided for cutting off one of the optical paths to alternatively effect the application of light from the one optical path on to the array to produce a first set of signals and thereafter the light from either the other optical path or the sum of the two optical paths on to the array to produce a second set of signals. The first set of signals are processed to produce a third set of signals which correspond to the ratio of each signal therein with respect to another of the signals and the second set of signals is processed to obtain a fourth set of signals corresponding to the ratio of each signal with respect to another of the signals. The third and fourth sets of signals, for each transducer, are compared and a signal is produced when a favorable comparison is obtained.
摘要:
The cam type time detecting mechanism of an alarm clock has a time gear wheel, an alarm gear wheel and a detecting plate, all mounted on a shaft. A hole is formed on either the alarm gear wheel or the detecting plate and a projection is formed on the other. The detecting plate is movable on the shaft in the axial direction of the shaft. The time gear wheel and the detecting plate have guiding parts respectively so that the time gear wheel, in its normal rotation, continuously pushes and turns the detecting plate. At least one of the time gear wheel, the alarm gear wheel and the detecting plate has a cam for lifting up the detecting plate if the time gear wheel and the alarm gear wheel turn either in normal and reverse directions.
摘要:
A driving mechanism including a stepping motor having a rotor which rotates through a certain angular interval each time the stepping motor is energized. A driving member having a plurality of radial slots is mounted for rotation about an axis and is rotated by the rotor. A driven member is mounted for rotation and includes a pin extending therefrom for engaging one of the slots as the driving member rotates and for disengaging from the one of the slots after the driving member has rotated past the certain angular interval, whereby the driven member is rotated through the certain angular interval upon energization of the stepping motor. The driving member includes arcuate peripheral portions over a limited angular extent and concentric with the axis of rotation of the driving member. The driven member includes concave arcuate portions of limited angular extend spaced about the periphery thereof. The driven member is rotatable to a position so that one of the arcuate portions is concentric with the axis of rotation of the driving member and extends along and opposite an arcuate peripheral portion of the driving member for preventing rotation of the driven member when an arcuate peripheral portion of the driving member and one of the corresponding concave arcuate peripheral portions of the driven member are opposed when the stepping motor is not energized.
摘要:
In a programming electric shutter for a camera, the photoconductive element receiving light from the subject to be photographed comprises a plurality of photoelectric bodies. An exposure multiple setting device permits using one or more of the photoelectric bodies selectively according to the exposure factors or the sensitivity of the film to be used.
摘要:
A light measuring apparatus comprises an oscillation circuit, a first delaying circuit for delaying an output waveform of the oscillation circuit in accordance with a peripheral brightness, a second delaying circuit for delaying an output waveform of the oscillation circuit for a predetermined period of time, and a brightness judging circuit for judging a peripheral brightness in accordance with outputs of the first and second delaying circuits.
摘要:
In order to reduce noise in a controlling circuit including digital circuitry and analog circuitry constructed together on a single CMOS integrated circuit, a regulator is constructed as part of the integrated circuit. A power supply is directly connected to the digital circuitry, and a voltage output of the regulator is supplied to the analog circuitry. The output state of the regulator may be controlled by a switch. Degradation of the performance characteristics of the analog circuitry while the digital circuitry is being operated can be prevented by electrically isolating the power supply to the digital circuitry from the power supply to the analog circuitry. Since the regulator is built into the integrated circuit, the number of externally provided components is thereby reduced, further contributing to the downsizing of an electronic device such as a camera. Furthermore, even when the power supply of the digital circuitry fluctuates greatly, the effects on the analog circuitry are minimized.