Abstract: An apparatus for detecting a focusing state of an objective lens comprises optical means for forming light intensity distributions of object images whose relative positional relationship changes with the focusing state of the objective lens, sensing means having a plurality of sensors for sensing the light intensity distributions to produce first and second signals relating to the light intensity distributions, signal processing means for relatively displacing the first and second signals by determining correlation information and producing a signal for adjusting the focusing state of the objective lens in accordance with the correlation information, and altering means for altering a displacement range within which the first and second signals are relatively displaced.

Abstract: A focus detecting device which is provided with a field lens disposed on the predetermined imaging plane of an objective lens and a plurality of imaging lenses disposed rearwardly of the field lens and in which the images of the imaging lenses are sensed to thereby determine the focus adjusted state of the objective lens. A unit body integrally constitutes the units such as the field lens and the imaging lenses and has a surface for movably supporting the field lens. The unit body also has adjusting device for rotating the imaging lenses relative to the optical axis.

Abstract: A camera having a focus state detection device, or more particularly a camera which effects searching to escape from disability of focus state detection by reciprocating a lens at least one reciprocation when the camera cannot detect the focus state, is disclosed. Once the searching has been effected, further searching is inhibited until in-focus or near in-focus state is attained in the focusing operation.

Abstract: A camera having an assembling adjusting device comprises a casing for a camera body, a photo-sensor disposed in the casing to receive an object image, a relay optical system for relaying a light beam from the object, a holder arranged in the casing to hold the relay optical system, a photo-sensor array for producing a focus detection signal in response to a focusing light from the relay optical system, a package for accommodating the photo-sensor array, a coupler for coupling the package to the holder, and compensation means for adjusting an attitude of the package to the holder to compensate for an inclination of the photo-sensor array plane to the focusing light.

Abstract: A correlation detecting method in which in order to detect the correlation between a pair of electrical signal trains which should effect a correlation operation, the operation is effected while the relative position of the signal trains is shifted and during the operation, the signal levels of at least the opposite ends of each signal train are reduced relative to the signals at a central position of the signal train, thereby mitigating the correlation error attributable to the signals near the ends of the signal trains.

Abstract: An adjusting screw for adjusting the inclination of a sensor unit body including sensing means for producing the information about the focus adjusted state on the basis of a light beam from an objective lens is moved with the sensor unit body perpendicularly to the optic axis of the objective lens, whereby adjustment of the optic axis of the objective lens is accomplished. At least two adjusting means are provided for inclining the sensing means itself at a predetermined angle with respect to the optic axis.

Abstract: A method and apparatus for detecting the focus state of an object image pattern in accordance with a plurality of photo-electrically converted output signals, including a first mode in which the plurality of photo-electrically converted output signals are sampled at different times and statistically processed for each output, wherein the focus state is detected in accordance with the statistically processed outputs, and a second mode for detecting the focus state without the statistical processing.

Abstract: An apparatus for detecting the shake of an image of an object, having first and second photosensor arrays for detecting an image of an object in two different directions, a signal processor for processing output signals from the first and second photosensor arrays and for producing a focusing control signal of an objective lens, a memory circuit for storing an output signal from the first photosensor array, and a discrimination circuit for discriminating the shake of the object in accordance with the signal stored in the memory circuit and a signal from the first photosensor array produced subsequent to this signal.

Abstract: In the disclosed automatic focusing device for a zoom lens the in-focus position for a particular object distance varies with changes in the focal length. The device detects the amount of variation of the focal length of the zoom lens, and continuously drives the focusing lens.

Abstract: A focus detection system includes an object lens for focusing an image of an object, a refocusing optical system for refocusing a plurality of component image having parallax from the image of the image, a view field mask arranged between the object lens and the refocusing optical system and having a laterally extending aperture, and a sensing device having a photo-sensor array for sensing the component images. Focus detection error is prevented by determining a sense area of the photo-sensor array in accordance with a distortion created in an aperture image by the refocusing optical system.

Abstract: A system for detecting the focus of an imaging lens relative to an object includes re-imaging means disposed on the imaging side of the imaging lens and having pupil dividing means for dividing the pupil of the imaging lens into a plurality of areas, the re-imaging means forming a secondary object image of the object from a light beam passed through the plurality of divided areas, an optical system disposed near the predetermined imaging plane of the imaging lens and having a reflecting surface for directing a primary object image of the object to the re-imaging means, and light-receiving means on which the secondary object image by the re-imaging means is formed.

Abstract: A solid-state imaging device including a plurality of line sensors has means for adding image signals from the line sensors arranged on the solid-state image device.

Abstract: This specification discloses a focus detecting system in which a plurality of images are formed on the basis of light beams passing through different portions of the pupil of an objective lens and the focus state of the objective lens is detected from the relative positional relation of these images and wherein filters of which the density distribution varies along the direction of arrangement of photoelectric conversion elements are disposed in front of photoelectric conversion element arrays for detecting the distributions of quantity of light of the images, thereby accomplishing shading correction.

Abstract: This is disclosed an exposure control device capable of controlling an exposure by using a CCD etc. sensor in which CCD sensor is also used for detecting a focus state of an imaging lens of camera or the like.

Abstract: In a camera where the light metering circuit is supplied with electrical power by pushing the shutter release button to a first stroke, an electrical power supply circuit is constructed in such a way that when the time for which the shutter release button remains at the first stroke exceeds the prescribed period of time, the electrical power supply is stopped, and then when the release button is pushed down further to a second stroke, the electrical power supply starts again.

Abstract: A focus detection apparatus has a field lens on or in a vicinity of an anticipated focal plane of an imaging lens and a refocusing optical system arranged behind the field lens to focus light beams transmitted through different areas in a pupil of the imaging lens onto a photo-sensor array to form a secondary image thereon, and detects a focus in accordance with an output signal of the photo-sensor array. A filter which blocks an infrared ray and transmits a visible ray is arranged adjacent to the field lens to prevent degradation of a filtering characteristic which depends on an inclination of a main light impinging to the filter.

Abstract: In an apparatus wherein on the basis of a light passing through an objective lens, a plurality of images whose relative positional relation varies in accordance with the focus state of the objective lens are formed and these images are detected by photoelectric conversion element arrays and a predetermined operation is effected by the use of a plurality of photoelectrically converted signals obtained correspondingly to the respective images to thereby detect the focus state of the objective lens, there are provided first adder means for comparing the photoelectrically converted signals of the respective images in a predetermined relation and adding the smaller signal and second adder means for comparing the photoelectrically connected signals of the respective images in a predetermined relation and adding the greater signal and focus detection is effected by utilization of the result of the addition of one of the first and second adder means in accordance with the object condition, whereby accurate focus dete

Abstract: When the disclosed automatic focusing device detects that a computed distance measurement is inaccurate, it shifts the lens a predetermined length to a new position for another measurement. A system senses when the inaccuracy arises from an overly dim scene, for which a distance cannot be properly measured in any case, and inhibits the successive shifts to avoid waste of energy.

Abstract: This specification discloses a camera which comprises a lens driven by an electric motor and a distance detecting circuit and in which change-over is automatically effected between an automatic focus adjusting mode in which the lens is usually driven by a signal from the distance detecting circuit and a manual focus adjusting mode in which the lens is driven manually when a signal for driving the lens is not put out from the distance detecting circuit, that is, in the case of the concurrence of far focus and near focus of an object to be photographed or in a case where the object to be photographed is of a low contrast, and in which even during the manual focus adjusting mode, the distance detecting circuit is operated and when an in-focus signal is put out from the distance detecting circuit, the lens is stopped for a predetermined time.

Abstract: In an in-focus state detection device for a camera for forming a plurality of images based on light fluxes transmitted through different areas of a pupil of an imaging lens and detecting the state of the imaging lens based on a relative positional relationship of the images, an optical system for forming the images and a sensor for sensing the images are constructed in a unit through two opposing mirrors to allow ready mounting of the optical system and the sensor, and the positions of the optical system and the sensor are adjusted through the unit member.