Abstract: The measurement device includes a light source that emits the distance measurement light, a focusing member that transmits the reflected distance measurement light and reflects reflected collimated light to form an image of the measurement target object, the reflected collimated light being reflected by the measurement target object and in a wavelength band different from a wavelength band of the reflected distance measurement light, a distance measurement light reception unit that receives the reflected distance measurement light that has been transmitted through the focusing member and the internal reference light, and a collimated light reception unit that receives the reflected collimated light reflected by the focusing member.

Abstract: The present invention discloses a shooting device and an unmanned aerial vehicle. The shooting device includes: a first reflector; a second reflector arranged to be opposite to a reflecting surface of the first reflector; a bracket, wherein the bracket includes: a connecting plate, a first rotating seat, which is fixedly connected with one end of the connecting plate in a rotatable manner and is used for clamping the first reflector, and a second rotating seat, which is fixedly connected with the other end of the connecting plate in the rotatable manner and is used for clamping the second reflector; driving parts, including a first driving part and a second driving part used for respectively driving the first rotating seat and the second rotating seat to rotate; and a camera arranged to be opposite to the reflecting surface of the second reflector.

Abstract: An image pickup apparatus capable of reducing unnecessary reflected light without narrowing an exposure area. A holding member holds a semi-transparent mirror and is rotatably supported by a mirror box so as to move between a mirror-down position in a photographing light path and a mirror-up position out of the photographing light path. A shading member is supported on an object-side end of the holding member via a rotation shaft so as to rotate between a closed position close to the holding member and an opened position apart from the holding member. An urging member energizes the shading member toward the opened position when the holding member is in the mirror-down position. An engagement portion engages with the shading member when the holding member rotates toward the mirror-up position so as to rotate the shading member toward the closed position against the urging force.

Abstract: A fluorometer for measuring fluorescence of a sample includes an excitation source for emitting electromagnetic radiation along a first beam path to induce fluorescence in the sample. An excitation filter transmits electromagnetic radiation from the excitation source toward the sample. An excitation filter holder supports the excitation filter and defines an aperture for passage of electromagnetic radiation from the excitation source. The aperture is positioned asymmetrically relative to the first beam path such that the aperture allows an asymmetrical portion of the electromagnetic radiation in the first beam path to pass toward the sample and the excitation filter holder blocks passage of a corresponding asymmetrical portion of the electromagnetic radiation in the first beam path.

Abstract: There are provided: a half mirror provided in a finder device and transmitting an incident light image from a subject side and projecting the incident light image onto a photographer side finder view window side; a display panel provided in a position facing the half mirror in the finder device and displaying a taken image of the subject taken by an imaging device with given brightness so that the displayed taken image (EVF image) is reflected by the half mirror so as to be projected onto the photographer side finder view window side; and a display control portion changing brightness of the display image (EVF image) displayed on the display panel so that the brightness of the display image (EVF image) increases gradually to given brightness or the brightness of the display image (EVF image) further increases gradually from the given brightness.

Abstract: A single lens reflex camera has a finder optical system that observes an image formed on a reticle by an objective lens, and a photometric device that measures light transmitted through the reticle via at least a part of the finder optical system, at a position shifted from an optical axis of the finder optical system. The finder optical system comprises a Fresnel lens surface which transmits light from the objective lens, and the Fresnel lens surface is positioned so that the center of the Fresnel lens surface is shifted in a direction to cross the optical axis of the finder optical system according to a position of the photometric device.

Abstract: There is provided an imaging apparatus having a viewfinder optical system; a first image sensor; a photometric sensor; and optical path changing means. The viewfinder optical system has a first reflective surface that reflects a monitoring luminous flux, and the first reflective surface changes a reflection angle of the monitoring luminous flux. A change in a reflection angle of the first reflective surface causes a course of the monitoring luminous flux to be switched between a first optical path and a second optical path. In a case of second optical path, a travel direction is changed with the optical path changing means placed on the second optical path, causing a photometric processing to be performed using the first image sensor, while in a case of the first optical path, the photometric processing is performed using the photometric sensor.

Abstract: According to the present invention, light from a taking lens is reflected by a quick return mirror in a lateral direction of a body unit. Then, after passing through a screen, the light is reflected toward an upper side of the body unit by a second mirror except part of the light. The light reflected by the second mirror is reflected by a third mirror in a direction opposite to a direction in which the light is reflected by the quick return mirror, and is further reflected by a fourth mirror toward an eyepiece located on a back side of the body unit. Part of the light which passing though the screen is taken by an AF sensor unit provided in rear of the second mirror, and an image formation position of an optical image is detected.

Abstract: A camera phone and photographing method for a camera phone is provided which allows a camera phone to easily and precisely set a composition of a subject to be photographed. If a standard, preset composition guideline is not appropriate for a particular subject to be photographed, a user may select from a plurality of additional composition guidelines stored in a memory portion of the camera phone. These selections may be altered to select a particular subject by varying characteristics such as type, shape, and color, and may be further altered by adjusting coordinate values of the related composition guideline to further suit the particular subject to be photographed. This camera phone and photographing method provide enhanced precision and ease of use when both photographing with a camera phone and editing using various computer-related tools.

Abstract: A camera comprises a spatial modulation optical filter that is disposed in a viewfinder optical system for subject observation at or near a position optically equivalent to an estimated image forming plane of a photographic optical system and modulates a subject light flux entering via the photographic optical system with transmission characteristics to obtain a light flux having a predetermined spatial frequency; a photoelectric conversion device that outputs a signal corresponding to detected light; an optical element that guides the subject light flux having been modulated at the spatial modulation optical filter to the photoelectric conversion device; and a focal adjustment state calculation means that calculates a focal adjustment state of the photographic optical system based upon the signal output from the photoelectric conversion device having received the modulated subject light flux.

Abstract: A focusing detection sensor is positioned in a viewfinder in a single-lens reflex camera but is nevertheless able to determine a focal point on an image of an object with enhanced accuracy. For that purpose, a single-lens reflex camera includes a camera body having a focusing plate with a reference mark in an optically equivalent position to film, a viewfinder replaceably attached to the camera body, a focal point detecting means for determining a focal point, deviation detection means for determining deviations for both the reference mark and the focal point, respectively, calibration means for correcting focal point data based on the output from the deviation detecting means, and a trigger means for enabling a user to activate the calibration means.

Abstract: A finder unit includes an objective optical system for forming a viewing image, an inverting optical system for making the viewing image formed by the objective optical system an erecting normal image, an eyepiece optical system for viewing the viewing image, a first optical component deployed closer to the objective optical system than the viewing image formation position, and a second optical component deployed closer to the eyepiece optical system than the viewing image formation position; and satisfies the condition 8<1000×(D1+D2)/f2(1/m) when the focal length of the eyepiece optical system is represented as f (mm), the distance from the viewing image formation position to the first optical component as D1 (mm), and the distance from the viewing image formation position to the second optical component as D2 (mm).

Abstract: A photometry device for a camera is provided with a normal light sensor having spectral sensitivity characteristics close to visual sensitivity characteristics, a plurality of colorimetric sensors having spectral sensitivity characteristics that are different from those of the normal light sensor, an exposure amount determining system that determines an exposure amount of an object in accordance with an output of the normal light sensor. A color of the object is determined in accordance with the outputs of the plurality of colorimetric sensors and an external light sensor that measures an external light illuminating the object at spectral sensitivity characteristics corresponding to each of the plurality of colorimetric sensors. Then, based on the determined color, an exposure compensation amount is determined.

Abstract: A single-lens reflex camera comprises a quick return mirror which can be positioned at an object observing position (or an inclined position) and a photographing position (or a horizontal position). A photoreceptor element is disposed in such a manner that a light receiving surface of the photoreceptor element faces a shutter, so that a light beam reflected by the shutter is led to the photoreceptor element. When the quick return mirror is retreated to the photographing position, the light beam is received by the photoreceptor element. When a change in the amount of received light by the photoreceptor element exceeds a predetermined range while the mirror is retreated to the photographing position before the shutter release operation, a warning is output.

Abstract: A photometry device for a camera has a normal light metering system and a plurality of light metering systems having different spectral sensitivity characteristics. An exposure amount of an object is determined in accordance with an output of the normal light metering system. A colorimetry system divides a photometry area into a plurality of areas and judges a color of the object at each of the plurality of areas. The compensation amount determining system determines the exposure compensation amounts respectively corresponding to the plurality of areas based on the color thereat. A compensation amount related to an area corresponding to a focused portion of the object. The exposure amount is compensated in accordance with the determined exposure compensation amount.

Abstract: A photometry device for a camera includes a normal light metering system having spectral sensitivity characteristics close to visual sensitivity characteristics, and a plurality of light metering systems having spectral sensitivity characteristics that are different from those of the normal light metering system. Further provided is an exposure amount determining system that determines an exposure amount of an object in accordance with an output of the normal light metering system, a colorimetry system that judges a color of the object in accordance with the outputs of said plurality of light metering systems. An exposure compensation amount is determined in accordance with the color judged by the colorimetry system, and then, the exposure amount is compensated in accordance with the exposure compensation amount.

Abstract: A secondary image formation type view finder comprising an objective optical system, a first mirror for folding an optical axis, a relay lens system and a second mirror for folding the optical axis, wherein an optical axis of the relay lens system is disposed so as to be included in a plane nearly perpendicular to an optical axis of the objective optical system, and the first mirror and the second mirror and disposed nearly in parallel with each other, thereby reducing a space to be occupied by the view finder.

Abstract: A camera includes an exposure part arranged to cause a film loaded on the camera to be exposed to light, an image sensor arranged to convert an object image into an electrical signal, a signal processing circuit arranged to carry out predetermined processes on the signal outputted from the image sensor, the signal processing circuit being arranged to perform the processes for obtaining an object image which is nearly equivalent to an image of a picture to be obtained when a specific film is exposed to light under set exposure conditions, and a display device arranged to display the object image by using the signal processed by the signal processing circuit.

Abstract: A real-image type viewfinder comprises a viewfinder optical system including a positive objective lens system for obtaining an inverted finder-image, an erecting optical system for converting the inverted finder-image into an erected finder-image, and an ocular lens system for viewing the erected finder-image through the erecting optical system. A half mirror is provided at a suitable location along a viewfinder optical axis, defined by the viewfinder optical system. A photometry optical system is provided along an extension of an incident optical axis, defined by a principal ray of light rays being incident on the half mirror along an optical axis of the objective lens system. An optical information-pattern-forming system is provided along an extension of a reflective optical axis, defined by a principal ray of light rays reflected by the half mirror toward the ocular lens system.

Abstract: In a photometering lens for an SLR camera in which object light transmitted through a finder screen and emitted from a reflecting optical member is received by a light measuring receiver, wherein the photometering lens has a light path for illumination light upon assembling the light measuring receiver, said illumination light being applied from said reflecting optical member toward the light measuring receiver, and wherein the position of said light measuring receiver is determined in accordance with an image of the light measuring receiver formed on the finder screen. An adjusting method of a photometering device having a photometering lens to adjust the position of the light measuring receiver is also disclosed.

Abstract: In a case in which the photometry region selected through a photometry region selection part is in the center of the screen, body spot photometry is selected for photometry of the object field, using luminous flux not passing through the screen. In all other cases, an output is selected for photometry of the image of the object field formed on the screen.

Abstract: A camera having an autofocus apparatus for multi-spot focus detection. Particularly, a camera is provided in such an arrangement that selection operation members for selecting an arbitrary area from a plurality of focus detection areas by a manual operation are provided at positions where a photographer can operate it readily with a finger while holding the camera in a lateral posture or in a vertical posture and that selection information selected through one operation member out of the above two operation members depending upon a holding condition of the camera, is validated, thereby improving the operability.

Abstract: A camera has a finder optical system and a range measuring optical system which are provided independent of a photographing optical system. The finder optical system includes an objective system having a positive refracting power, an image inverting optical member having a plurality of reflecting surfaces for erecting an image formed by the objective system, and an eyepiece system having a positive refracting power. At least one of the reflecting surfaces constituting the image inverting optical member is disposed as a path splitting member In the optical path of the objective system so that one of optical paths split by the path splitting member is used for the finder optical system and the other is used for the range measuring optical system. A positive refracting power is provided, as a whole, between the path splitting member and the imaging plane of the objective system, without any refracting power between the path splitting member and a range measuring element.

Abstract: Camera capable of indicating set photographic field by masking an area out of the photographic field nearby an image forming plane within a visual field of a viewfinder or lowering transmittance of the area in accordance with a change of photography format such as from an ordinary shot to a panoramic shot. The camera includes light-receiving elements for photometry which output a signal in response to amount of light transmitted through the image forming plane within an optical path of the viewfinder, a correcting circuit for correcting the element output in response to the set photographic field, and a photometry circuit for calculating a photometric value.

Abstract: A camera body has at least one opening formed in a front position thereof for receiving optical information about a subject. A remote control light sensor is provided within the camera body to receive a remote control light signal emitted from an external remote control transmitter. An optical unit is placed between the opening and the remote control light sensor to direct at least the remote control light signal onto the light sensor. A control unit is responsive to an output of the remote control light sensor to control a predetermined operation associated with the camera body.

Abstract: A camera and method are disclosed which provide a photographer with a picture composition guide that may be viewed through the viewfinder. Standard composition points corresponding to golden section points are displayed for the photographer to see. LCD's or LED's are used to display the composition points, and an external display portion allows the photographer to check a display state of the standard composition points.

Abstract: An optical apparatus includes a projection optical system for projecting an object image; a focal detection system for detecting a defocus state of the object image with respect to a photosensitive plane by a light emitted from the projection optical system; a finder system for observing the object by the light emitted from the projection optical system, the finder system being provided with a light modulation unit for creating a light transmission state when electric energy is input and a cutoff state when electric energy is not input, and the light modulation unit being disposed so as to cover the view field of the finder system; and a control unit for controlling input of the electric energy to a light modulation unit, the control unit controlling so as not to input electric energy when the user does not look through the finder system.

Abstract: The present invention provides a photometric device for a camera in which the relative positions of the photometric sensor and a secondary image formed on the sensor can be adjusted with high resolution and which also facilitates adjustment in a plurality of directions.A photometric device for a camera according to the present invention comprises a photometric sensor that internally provided in the camera body and that can perform photometry on the photographing field, a photometric lens which re-forms the image of the field originally formed as the primary image on the viewfinder screen of the camera as a secondary image on the photometric sensor, and a tilt adjusting mechanism that integrally adjusts the inclination of the photometric lens and the photometric sensor against incident light rays entering the photometric lens.

Abstract: A photometric device that makes improved accuracy of screen photometry possible is disclosed. The photometric device includes a screen component that transmits a luminous flux from a subject field, a light emitting indicating device that is placed in the vicinity of the screen component and that indicates light emitting photographic information, and a photometry component that receives the transmitted luminous flux and outputs the received luminous flux as a first photometric value of the subject field. The photometric device is equipped with an adjustment device that determines a second photometric value based on a higher order or non-linear function of the first photometric value that differs from the first photometric value by a photometric value adjustment amount to compensate for the emitted light of the light emitting indicating device.

Abstract: An optical low-pass filter is built with circular phase components consisting of randomly distributed convex and concave surfaces. The area of the phase components is structured to cover 1/2 the entire surface area of the low-pass filter. Moreover, the phase components are set to a height such that the phase difference between the light passing through the phase components and the other areas of the filter is 1/2 its wavelength. The optical low-pass filter is installed in front of the photometric optical system. It is therefore possible to precisely measure light regardless of incidence of light from the photographic subject even when using photometric sensors that have been divided into multiple units.