摘要:
In a speed control circuit for a vibration wave motor, when a level of a periodic signal applied to the motor is of first level, a frequency of the periodic signal is changed between a first frequency and a second frequency to change a speed between a first velocity and a second velocity, and when the frequency reaches the second frequency, the signal level is switched from the first level to the second level and the frequency is shifted by a predetermined amount toward the first frequency and then toward the second frequency so that the speed is changed from the second velocity to a third velocity.
摘要:
The present invention discloses an image taking apparatus which can control image deterioration caused by the image size of an attached lens apparatus and image generating region of an image pickup element not corresponding. The image taking apparatus has an image pickup element which photoelectrically converts an object image formed by the attached lens apparatus; an image producing section which produces recording image data to be recorded based on an output from the image pickup element; and a controller which judges an image size of the attached lens apparatus and changes an image producing region for producing the recording image data within a light receiving region of the image pickup element based on the judged image size.
摘要:
An image blur correcting system includes a photographing device including arithmetically operating means for determining a relation between a detection output value of the blur detecting means and a driven amount of the image blur correcting means corresponding to the detection output value in accordance with information related to a blur prevention sensitivity, conducting arithmetic operation on the basis of the determined relation to calculate a drive signal for driving the image blur correcting means in accordance with the detection output value of the blur detecting means, and transmitting means for transmitting the drive signal calculated by the arithmetically operating means to the optical device, and an optical device including transmitting means for transmitting the information related to the blur prevention sensitivity to the photographing device, and drive control means that receives the drive signal for controlling the driving of the image blur correcting means in accordance with the drive signal.
摘要:
An apparatus to which an accessory is connected includes a plurality of connection terminals at which the accessory is connected. With the accessory connected to the apparatus, the apparatus first detects states of the plurality of connection terminals by setting at least one connection terminal of the plurality of connection terminals for signal outputting, and then detects states of the plurality of connection terminals by setting at least one connection terminal of the plurality of connection terminals for signal outputting, the connection terminal set for signal outputting for the second time being different from the connection terminal set for signal outputting for the first time. Then, the apparatus determines a kind of the accessory mounted to the apparatus, on the basis of results of detection obtained for the first time and for the second time.
摘要:
The present invention relates to a camera having a reproducing circuit for reproducing information recorded in a magnetic recording portion of a film. This invention provides a camera capable of properly reproducing information by using the reproducing circuit in such a manner that the reproducing characteristics of the reproducing circuit are adjusted in accordance with the speed at which said image recording member is fed.
摘要:
A driving circuit for a vibration wave motor, in which a periodic voltage is supplied to electromechanical energy converting elements generates a travelling vibration wave in a vibrating member, thus causing a relative movement between the vibrating member and a movable member. For achieving effective operation of the vibration wave motor, the driving circuit controls the amplitude of the periodic voltage supplied to the electromechanical converting elements according to the drive state of the vibration wave motor.
摘要:
A camera of the kind having a magnetic head for magnetically recording data in a track part of each frame portion of a film is arranged such that, in re-recording information in the track part having a previous record of data, a predetermined signal for erasing information is supplied to the head during a period other than a period during which a data signal is supplied to the head, so that new data can be recorded by completely erasing, without fail, the previous record of data in carrying out the re-recording.
摘要:
A camera uses a film having a magnetic record member for each frame on film. When the film is loaded in the camera, the information recorded in the record member of each frame is detected. It is judged whether each frame is exposed or unexposed. Even if some frames on the leader side and on the trailer side of film were already exposed, the camera can perform accurate positioning of first unexposed frame and exposure on each unexposed frame.
摘要:
A camera adapted for using a film cartridge of the kind having a magnetic recording part provided for each frame portion of a film contained therein is arranged to write information into the recording part every time a shot is taken for each frame. In case where the film contained in the film cartridge is used only halfway, the camera makes a search for the beginning part of unexposed frame portions by detecting the amount of information recorded in the magnetic recording part of each frame portion. For this purpose, a reference value to be used in making a discrimination between an exposed state and an unexposed state is set on the basis of the amount of information obtained from each frame and also according to the amounts of noises, etc. The arrangement disclosed enables the camera to accurately carry out the search for the unexposed frame portions of the film.
摘要:
A magnetic recording-reproducing circuit in a camera includes a magnetic head for reproducing information recorded on a magnetic recording portion, a first amplifying circuit having at least two input ends, the output of the magnetic head being connected to one of the input ends of the first amplifying circuit, a second amplifying circuit having at least two input ends, the output of the magnetic head being connected to one of the input ends of the second amplifying circuit, a first impedance for connecting the other input end of the first amplifying circuit and the other input end of the second amplifying circuit together, a second impedance for connecting the other input end and the output end of the first amplifying circuit together, and a third impedance for connecting the other input end and the output end of the second amplifying circuit together. The circuit also includes first and second comparison circuits and a binarization circuit for binarizing information recorded on the film on the basis of outputs of the first and second comparison circuits.