摘要:
A prism unit has transmitting/totally-reflecting surfaces which cross each other, formed using at least one prism. Light emanating from a light source falls on the prism unit. The light is transmitted or totally reflected from the surfaces according to an angle of incidence at which the light falls on the prism unit. Transmitted light is radiated forwards, while totally-reflected light is directed laterally. A reflecting member is located laterally in order to cover the prism unit, whereby light totally reflected laterally by the prism unit is reflected forwards. In order to constitute the transmitting/totally—reflecting surfaces, a first air layer and a second air layer are formed in the prism unit so to have a substantially uniform width and oppose each other with a plane, which contains a glowing member of the light source and extends forwards, between them.
摘要:
A lens barrier device is provided which includes an adaptor body capable of being removably attached on a taking lens frame, a lens barrier member capale of movement between a closed position covering a taking lens and an open position withdrawn from the front of the taking lens, and an engagement member capable of engagement with a filter screwthread of the lens frame. If the lens barrier member in the open position is rotated excessively by wrong manual operation, the edge of the lens barrier member presses on the engagement member, releasing the engagement with the filter screwthread and so separating the adaptor body from the lens frame, thereby protecting the lens barrier device.
摘要:
In the present invention, flash light is illuminated through a finder optical system and thereby the user can be notified of the moment of release operation. The camera size can be reduced by the following layout of the finder unit and the flash unit. This camera has a finder unit having a finder optical system (object lens group, mirror, prism and finder eyepiece window) and a flash unit including, for example, a midget bulb-type flash light illumination unit (discharge tube) and a reflector, which comprise the optical system for flash light illumination. A movable mirror is mounted and properly controlled so that part of the light path of the finder optical system (object lens group) also serves selectively as part of the light path of the optical system (object lens group) for flash light illumination. The above flash light illumination unit is installed behind the mirror on the extended optical axis of the object lenses.
摘要:
The invention is directed to an engaging mechanism. The engaging mechanism comprises a cam element which moves upon modification of an engaging position, a cam follower abutted against a cam surface of the cam element, a detecting element for detecting a position of the cam follower, and a section to be detected provided on the cam follower, for giving at least three different kinds of output values to the detecting element.
摘要:
An image heating device comprises a cylindrical heating roller with a Curie temperature of 210.degree. C., a magnetization coil for magnetizing the heating roller with an alternating magnetic field, which is arranged inside the heating roller, and a nip portion for heating a recording material that carries a toner image with heat from the heating roller, while the recording material is being conveyed along said nip portion. The ratio between the amount of heat generated in said heat-generating member at Curie temperature or higher to the amount of heat generated at room temperature in said heat-generating member is not more than 1/2. With this configuration, the heating roller can regulate its own temperature to stabilize at a temperature that is suitable for fixing, and the problems of partial overheating or underheating, unstable heat generation, or damage of the device can be eliminated.
摘要:
The invention is directed to an engaging mechnism. The engaging mechanism comprises a cam element which moves upon modification of an engaging position, a cam follower abutted against a cam surface of the cam element, a detecting element for detecting a position of the cam follower, and a section to be detected provided on the cam follower, for giving at least three different kinds of output values to the detecting element.
摘要:
A color electrophotographic apparatus for forming color images has advantages of compact and simple construction, easy positioning of an exposure position and easy inspection. The apparatus includes a plurality of rotatable image forming units corresponding to the number of colors, each of the units including a pivotable photosensitive member on which a toner image is formed and a developing device containing a color toner. The apparatus further includes an exposure device for exposing a toner image by emitting a signal light from outside of the image forming units and a mirror for reflecting the signal light to an exposure position, the mirror being placed in the neighbor of a rotation axis.
摘要:
A photographed picture size switchable camera of the present invention can switch photographing optical systems and picture masks through a zoom driving mechanism by means of a switch input from zooming operation and can switch a photographed picture size from a normal size to a panoramic size or half size which is smaller than the normal size. Thus, a good picture can be taken even in a wide angle or telephotographic area which is wider or further than an ordinary zooming region.
摘要:
The present invention comprises a distance measuring unit for measuring distances to subjects existent in specific areas within a photographic angle of view, a memory for storing distance measurement information representing measured distances from the camera to at least two subjects existent at different distances the distance measuring unit provides, a specifying unit for specifying positional relationships of at least two subjects to the camera, a display interlocked with specification of the specifying unit and helping an user recognize the positional relationships the specifying unit provides, an arithmetic logic unit for computing the distance measurement information and positional relationships to calculate an inclination of a photographic optical system necessary for producing an image in which at least two subjects are in focus, and a drive for tilting the photographic optical system according to an output of the arithmetic logic unit. Alternatively, this invention comprises an arithmetic logic unit for computing the distance measurement information and positional relationships to calculate angles of the subjects relative to the center axis of the camera, and at least two flashtubes for varying quantities of flashlight according to the information the arithmetic logic unit provides, and thus exposing the subjects to light optimally.
摘要:
A color electrophotographic apparatus arranged as follows is disclosed. A plurality of image forming units (1BK, 1C, 1M, 1Y) each including a developing device having an electrostatic latent image holding member and toner of a different color are employed. Each of the image forming units is arranged to be displaceable so as to be moved to the same image forming position for positioning. At the image forming position, the image forming unit is exposed to light image by an exposure device for image formation, with its toner image being transferred onto a transfer material through a confronting transfer transport device. The image forming unit at the image forming position is sequentially exchanged, and by the reciprocation of the transfer material through the transfer/transport device, toner images of respective colors are transferred as overlapped through positioning for coincidence, onto the same transfer material.