摘要:
Travelling oscillation waves are generated in a lens assembly at an oscillation element by impressing a voltage to an electro-restriction element or elements, whereupon a lens driving operation is performed by frictionally driving a moving element which is pressed in contact with the oscillation element. In the case of manual operation, an oscillation ring operating as the oscillation element is separated from a rotation ring which constitutes the moving element by a clutch device and then the rotation ring is manually rotated for effecting the lens driving operation.
摘要:
In a diaphragm device, a progressive oscillation wave is generated at a vibrating member by electrically energizing electrostriction members while a movable member which is arranged to actuate diaphragm blades is pressed into contact with the vibrating member by means of an urging member. The movable member is then frictionally driven by the oscillation wave to drive the diaphragm.
摘要:
In the camera disclosed, a display device adapted for displaying photographic information and a pattern, etc., with a liquid crystal within the camera view finder, a polarizing arrangement which creates a contrast between a portion of the display and another is combined with the liquid crystal. This produces a display with a high contrast portion and a low contrast portion.
摘要:
A camera constructed from at least three different units or parts arranged in combination, with the units being releasably attached to each other by respective individual coupling devices which are made with a basically similar construction and which are operated to lock the individual camera parts together and to unlock the connection therebetween upon release actuation of the coupling devices.
摘要:
A vibration wave motor comprises a movable member friction-contacted to a vibration member, a plurality of electrostrictive element groups oppositely arranged on the opposite surfaces of the vibration member, and voltage applying means for applying voltages to the electrostrictive element groups to generate travelling vibration waves in the vibration member. The electrostrictive elements are arranged such that the electrostrictive elements oppositely arranged on the opposite surfaces of the vibration member are strained in the opposite directions when the voltages are applied thereto.
摘要:
A camera with a voice transmitting device able to detect necessary informations for judging various states of the camera at the time of photography and to make a weighing of the informations according to degrees of importance of thus detected informations so that when there exists a certain information selected by the weighing an indication or an instruction corresponding to the information is transmitted by voices to a photographer.
摘要:
In a drive system for a vibration wave motor for generating a travelling vibration wave by friction-contacting a vibration member to a movable member and by electro-mechanical energy conversion means contained in one of the vibration member and the movable member to friction-drive the movable member, a standing vibration wave is generated by the electro-mechanical energy conversion means prior to the start.
摘要:
At least one electro-optical light shielding member is disposed close to a reticle of a photographic camera arranged for forming an image of an object to be photographed. The light shielding member is electrically controlled to have the reticle partly light-shielded by the light shielding pattern of the light shielding member in such a manner as to permit selection between an averaging light measuring mode and a spot light measuring mode.
摘要:
In a vibration wave motor, a plurality of electrostrictive elements are phase-differentially arranged or polarized on a ring-shaped vibration member having a thickness which increases as it radially goes from a center to an outer circumference, periodic voltages are applied to the electrostrictive elements to generate a travelling vibration wave in the vibration member, and a movable member press-contacted to the vibration member is friction-driven by the travelling vibration wave.
摘要:
In a vibration motor, electrostrictive elements arranged or polarized phase-differentially are bonded to a plurality of concentric ring-shaped vibration members arranged on at least one of a stator and a rotor, voltages are applied to the electrostrictive elements to generate travelling vibration waves in the vibration members and the rotor contacting to the vibration members is friction-driven by the travelling vibration wave.