Abstract: A camera system comprising means for converting an object image into an image signal, recording means for recording the image signal on a recording medium, reproduction means for reproducing the image signal recorded on the recording medium, finder means for displaying the object image and display means for selectively displaying an image corresponding to the image signal to be recorded or an image corresponding to the reproduced image signal. A display portion of the finder means is smaller than that of the display means and the display portion of the display means has a flat plate which can be exposed to an outside of the camera system.

Abstract: An image pickup device which includes a device for picking up an image of an object and photoelectrically converting the image into an image signal, a photograph indicating device, for indicating a photographing of the object, an exposure amount setting device, for setting an amount of exposure for effecting photoelectric conversion by the image pickup device and an exposure amount control device, for controlling the exposure amount setting device.

Abstract: An image recording system in which an object image is caused to be formed on a solid state image transducer such as CCD each time a release is actuated, and the image signal stored on said image transducer is recorded as a video signal, thus a single frame image being recorded for each release. By controlling the storing operation of the image signal and the like, the exposure level for the image signal is adjusted to make it possible to record and reproduce the image always with regard to an optimum exposure state.

Abstract: An image recording system in which an object image is caused to be formed on a solid state image transducer such as CCD each time a release is actuated, and the image signal stored on said image transducer is recorded as a video signal, thus a single frame image being recorded for each release. By controlling the storing operatin of the image signal and the like, the exposure level for the image signal is adjusted to make it possible to record and reproduce the image always with regard to an optimum exposure state.

Abstract: An image recording system in which an object image is caused to be formed on a solid state image transducer such as CCD each time a release is actuated, and the image signal stored on said image transducer is recorded as a video signal, thus a single frame image being recorded for each release. By controlling the storing operation of the image signal and the like, the exposure level for the image signal is adjusted to make it possible to record and reproduce the image always with regard to an optimum exposure state.

Abstract: In a monolithic sensor IC, the light sensing element is formed on a base plate and a light-absorber coating such as black paint is provided on the surface of the semiconductor at positions other than the light path to the light sensing element, with the surface of the light-sensing element being provided with a reflection-prevention coating and with the entire sensor being housed within a package, the inside of the package of the IC also being provided with light-absorbing black paint.

Abstract: An image recording system in which an object image is caused to be formed on a solid state image transducer such as CCD each time a release is actuated, and the image signal stored on said image transducer is recorded as a video signal, thus a single frame image being recorded for each release. By controlling the storing operation of the image signal and the like, the exposure level for the image signal is adjusted to make it possible to record and reproduce the image always with regard to an optimum exposure state.

Abstract: Disclosed is a method of detecting the focusing condition of an image forming optical system to an object, in which two images of the object are formed with respective light beams from the prescribed exit pupil areas lying in almost symmetry to each other with respect to the optical axis of the optical system and are sensed to obtain an equal number of picture element data for each of the images, and based on the thus-obtained picture element data, while sequential shifting for the first image is carried out from its one end to its opposite end, and a sequential shifting for the second image from its symmetric one end thereto to its opposite end, each by a predetermined number of picture elements, a correlation betweeen the first and second images in every predetermined equal number of picture elements is sought, whereby an optimum correlation is obtained, the corresponding mutual positional relationship between the above-described predetermined numbers of picture elements is detected to discriminate whether

Abstract: A focus detecting system has a signal processing circuit for processing output signals from photoelectric transducer elements and generating an output representing the focusing state. A circuit is provided to stabilize the output against abrupt changes in focusing condition.

Abstract: Disclosed is a signal accumulating time control method for a signal accumulating type radiation sensing device which produces an electrical signal corresponding to the amount of incident radiation and accumulates the same. According to the improvement of the present invention, the accumulating time is controlled by successive approximation at different intervals when there happens a situation in which the accumulating time must be changed greatly.

Abstract: In a signal accumulating time control method and apparatus for a signal accumulating type radiation sensing device which produces an electrical signal corresponding to the amount of incident radiation and accumulates the same, an accumulating time controller has first and second different control modes and is adapted to change over from one of said first and second control modes to the other when the intensity of said incident radiation fluctuates a large amount.

Abstract: In the device disclosed, an image formed by an optical system is scanned by an image sensor composed of independently arranged photoelectric transducing elements to produce an image scanning signal. A detecting circuit detects the variation of the brightness between the adjacent image elements as a measure of the sharpness of the image and the focus of the optical system. The focus detection accuracy is improved by non-linear transformation of the brightness variation signal with a non-linear transformation circuit that weighs the brightness variation signal on the basis of the signal level. A signal forming circuit detects the difference between the outputs of transducing elements and adds the differences to produce a comparator signal when a predetermined relationship is reached between the sharpness indication and the addition signal.

Abstract: A focus detecting apparatus is disclosed which includes a focusing optical system for forming an object image on a predetermined focal plane and photoelectric devices disposed before and behind the focal plane at substantially equal distances from the plane. The photoelectric devices detect the focus states of the object images formed thereon respectively. The focus state of the object image on the focal plane is detected depending on whether or not the focus states on the photoelectric devices are equal to each other. According to the invention such a focus detecting apparatus further includes a mask for gradually decreasing the quantity of light incident upon the photoelectric devices in the direction away from the center of the incident beam. Under the action of such a mask, the focus states of object images before and behind the predetermined focal plane at substantially equal distances from the focal plane are made approximately equal to each other.

Abstract: A camera system has a camera main body which has a focus detecting device for detecting a focusing state of a photographic optical means in a photographic lens assembly mounted, a display responsive to an output signal from the focus detecting device, and a contact for transmitting the output signal of the focus detecting device to outside of the camera main body. In this camera system, the camera main body are usable with a photographic lens assembly of first type which has an automatic focusing device which is capable of automatically focusing the photographic optical system on the basis of the output signal from the focus detecting device, and with a photographic lens assembly of second type which does not have such an automatic focusing device. When the camera main body is combined with the photographic lens assembly of first type, automatic focusing of the photographic optical system may be performed.

Abstract: This specification discloses a detecting device provided with means for receiving radiation coming from an object and producing an electrical signal related thereto, focus detecting means for processing the produced electrical signal and producing a focus discrimination or determination signal, the detecting means forming a focus related or parametric signal in the course of the processing of the electrical signal, and relative movement detecting means coupled to the focus detecting means to detect the relative movement between the object and the device on the basis of the focus related or parametric signal.

Abstract: A focusing state discriminating system of the invention discriminates the focusing state of an image forming optical system, based on signals F1, F2 and F3 representing image formation states of images formed at first, second and third positions of the optical system which substantially correspond to positions slightly in front of, coincident with and slightly behind the predetermined focal plane of the image forming optical system. The operation for discrimination in this system includes at least a comparison of .vertline.F1-F3.vertline. and K(F1+F2+F3), where K is a constant.

Abstract: There is provided a metering system using a focus detecting optical system characterized in that in a light path formed by an optical system for directing a light beam to focus detecting photoelectric transducer means, metering photoelectric transducer means, together with the focus detecting photoelectric transducer means, is disposed to effect the measurement of the brightness of an object as well.

Abstract: In the disclosed optical device, independent light sensors located at separate positions which receive light projected by a projector and reflected by an object whose distance is to be measured, produce outputs corresponding to their respective positions. A distance indicator indicates the distance to the object on the basis of the ratio of outputs of the sensors.

Abstract: A focus detecting system for detecting a focusing state is adaptable to various optical systems of different specifications. The focus detecting mode of the system changes according to the specifications of the associated optical system and the focus detection signal is normalized to compensate for changes in the brightness, contrast and pattern of the object being focussed. Additionally, the field of view may be varied in accordance with the selected optical system and the focus detection signal is normalized to compensate for changes in the brightness, contrast and pattern of the object being focussed. Additionally, the field of view may be varied in accordance with the selected optical system.

Abstract: In the device disclosed, an image formed by an optical system is scanned by an image sensor composed of independently arranged photoelectric transducing elements to produce an image scanning signal. A detecting circuit detects the variation of the brightness between the adjacent image elements as a measure of the sharpness of the image and the focus of the optical system. The focus detection accuracy is improved by non-linear transformation of the brightness variation signal with a non-linear transformation circuit that weighs the brightness variation signal on the basis of the signal level.