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Searching: photography





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Patent # Description
US-4,230,870 Novel photographic color couplers
Novel magenta forming color couplers for use in silver halide color photography are described which correspond to the formula: ##STR1## wherein R.sub.1...
US-4,230,402 Flash exposure control system
The present invention relates to a device for flash light photography and, more particularly, to a device for flash light photography for adjustable light...
US-4,229,091 Motor drive device for a camera
A motor wind up device which is automatically stopped after completion of photography of a roll of film in a camera. A control circuit of the motor controlling...
US-4,227,791 Lens barrel for flash photography
A lens barrel in which a distance ring is coupled to an aperture ring so that correct exposure can be obtained in flash photography. In the arrangement, a...
US-4,225,218 Exposure time control circuit for camera with flash light device
In a camera provided with an electronic flash light device, the exposure time is controlled based on a manually selected condition when so required in case that...
US-4,222,658 Device for applying the Kirlian photography for diagnosis purposes on human beings
A device for use in connection with Kirlian photography, which includes a seat insulated with regard to a support for the seat, a foot rest insulated relative to...
US-4,221,863 Formation of silver halide grains in the presence of thioureas
A silver halide emulsion which is useful in photography is described. The silver halide grains are characterized by uniform and increased grain size and uniform...
US-4,220,292 Photography film spool
A spool for a 35 mm photography film of plastic material with parts of the outer surface of a winding shaft thereof brought into contact with the film being...
US-4,219,268 Device for electronic-flash proximity photography
A camera support for electronic-flash proximity photography is formed from a substantially flat support having openings therethrough for the camera lens, the...
US-4,219,014 Light source device for endoscope which controls the voltage across a single light source for performing both...
A light source provided in an endoscope is controlled to provide a constant comparatively low luminance when the object is to be observed, and to provide a first...
US-4,214,814 Variable soft focus lens system
A variable soft focus lens system particularly adapted for photography is disclosed. The lens system incorporates two lens groups, a first object side lens group...
US-4,211,562 Photographic compositions with silver halide solvents containing thioether groups
Difunctional compounds wherein one of said functions is a hard or soft atom that ionizes to the corresponding anion in alkaline solution to combine with silver...
US-4,211,559 Photographic processes and compositions employing thioether containing silver halide solvents
Difunctional compounds wherein one of said functions is a hard or soft atom that ionizes to the corresponding anion in alkaline solution to combine with silver...
US-4,210,387 Focus device for zoom lens
A focus device for a zoom lens having a mounting barrel focus member and a variator member. A stopper defines a short distance limit stop position. The stopper...
US-4,209,328 Dye image forming process
In a dye image forming process in color photography comprising imagewise exposing a photographic element comprising a support and a light sensitive silver halide...
US-4,209,244 Light responsive camera actuation control
In camera control circuitry including an exposure control circuit for controlling exposure factor or exposure factors, e.g. exposure time and/or diaphragm...
US-4,208,339 Process for the preparation of para-benzoquinone
p-Benzoquinone is prepared by oxidizing phenol with molecular oxygen or with a gas in which oxygen is present, in the liquid phase, in the presence of cuprous or...
US-4,208,115 Viewfinder system with focusing screen
A focusing screen of a viewfinder system for a photographic camera is designed as a liquid crystal cell having two transparent bodies which lie opposite one...
US-4,208,102 Enlargement lens mount
An enlargement system has a light guide mounted inside the lens mount to reflect light from inside the enlarger on to a stop-value scale. A light shut-off ring...
US-4,206,997 Method and device for making combined images for photography
An image combining apparatus for use in photography. The apparatus is in the form of a rectangular box having three open vertical side walls. A removable one-way...
US-4,206,972 High resolving objective covering a wide spectral r nge
The invention concerns a high-resolving objective particularly for use in aerial photography based on the double-gauss objective type, covering a wide spectral...
US-4,201,584 Silver halide elements containing yellow forming color couplers for silver halide photography
Novel color forming couplers for use in silver halide color photography are described. These couplers upon oxidative coupling with an aromatic primary amino...
US-4,200,902 Photography light
A camera-mounted illuminating device particularly useful for motion picture photography to provide relatively constant lighting of close-up scenes in motion...
US-4,200,370 Camera for daylight and flash photography
An automatic exposure control system for cameras of flash photographic capabilities which is switched to either of the daylight or the mode depending upon...
US-4,199,759 System for correlating electronic distance measurement and aerial photography for the extension of geodetic control
A system for correlating electronic distance measurement and aerial photography where an airborne electronic location station is photographed as it passes over...
US-4,196,001 Antistatic layer for photographic elements
Photographic elements are protected against the adverse effects resulting from accumulation of static electrical charges by incorporating in the element an...
US-4,194,824 Camera equipped with automatic unwinding device
A device for decoupling the film transport mechanism in a camera is operable either independently, for performing multiple-exposure photography, or by an...
US-4,194,818 Electronic flash unit for fill-flash photography
A quenchable electronic flash for use with a camera having an M-contact flash synchronization device, includes a flashtube for producing light, a ...
US-4,193,667 Zoom lens system capable of constant magnification photography
A constant magnification zoom lens system is provided that has the capability of permitting a predetermined desired constant magnification of an image during a...
US-4,191,461 Camera jig for underwater stereoscopic photography
A portable camera jig for use by divers in making close-up, stereoscopic tographs of underwater surfaces with a single lens camera includes, in combination with...
US-4,191,460 Camera with automatic focus adjustment device
A camera having a zoom lens with a focusing range changeover device for selectively permitting photography in either one of the ordinary zoom and macro-zoom...
US-4,187,225 Novel synthesis of bis pyrazolone oxonol dyes
In one embodiment, this application is directed to an improved method of synthesizing certain bis-pyrazolone oxonol compounds useful as antihalation dyes in...
US-4,187,017 Motor drive device in a camera
In a motor drive device capable of being coupled to a camera having an automatic exposure control circuit for determining the aperture value and/or the shutter...
US-4,186,305 High-temperature microscope
The present invention relates to a high-temperature microscope. According to this invention, a specimen is held in vacuum with one side of it heated through...
US-4,184,872 Additive system of color photography based on iridescent pigments
An inorganic system of color photography in which colored images are recorded with compositions comprising a mixture of an iridescent pigment of the type...
US-4,184,759 Photographic apparatus
A photographic apparatus of the foldable type in which, when in preparation for photography, a front housing carrying a photographic objective lens system...
US-4,182,918 Process for the preparation of polyhydric phenols
A process has been invented for the preparation of dihydric substituted phenols which comprises reacting a solution, which is essentially anhydrous and free from...
US-4,182,917 Process for the preparation of polyhydric phenols
A process has been invented for the preparation of pyrocatechol and hydroquinone which comprises reacting a solution which is substantially anhydrous and free...
US-4,182,573 Exposure meter
An exposure meter for use in photography which includes means for measuring brightness at a plurality of places in a scene to be measured for exposure, means for...
US-4,182,557 Single lens reflex camera capable of high speed continuous photography
A single lens reflex camera capable of the high speed continuous photographing. It achieves high speed continuous photography by means of an automatic winding up...
US-4,181,297 Positioning device for human limbs and the like
A positioning device for holding a human limb in a fixed position on a table for examination and/or X-ray photography. The device secures the limb against...
US-4,179,290 Photoelectrophoretic photography process involving dual corona treatments of opposite polarity
A photoelectrophoretic image-forming process utilizing a pair of electrodes with at least one of the electrodes being transparent and at least one of the...
US-4,178,447 Novel synthesis of 3,3-substituted dihydrobenzisothiazole-1,1-dioxides and...
This invention relates to a method of synthesizing certain 3-(carbocyclic aryl)-3-(4'-OP-carbocyclic aryl)-2,3-dihydrobenz[d]isothiazole-1,1-dioxides (and ...
US-4,178,181 Interference film photography
This invention concerns improvements in interference film photography.
US-4,178,090 3-Dimensional camera device
This invention relates to a reflex camera device having a single lens for the photography of right and left images from an object space transmitted as first and...
US-4,175,829 3-Dimensional camera device
This invention relates to a reflex camera device having a single lens for the photography of right and left images from an object space transmitted as first and...
US-4,174,162 Aerial camera mounting means
An improved apparatus is disclosed for adjustably mounting an aerial photaphy camera externally of an aircraft, including a support adapted for attachment to...
US-4,169,666 Foreground stabilization system for use in composite photography
In a composite photography system of the type wherein a foreground camera photographs life-size actors and objects while a background camera photographs scenery...
US-4,168,891 Camera for daylight and flash photography
A camera having an electronic flash unit either incorporated therein or removably attached thereto is provided with a flash mode selector and a flash energy...
US-4,168,338 Transfer sheet with toner-receiving layer of thermoplastic and thermosetting polymers
A transfer sheet for electrostatically transferring thereon an electrically conductive or electrically semi-conductive toner in electrostatic photography or...
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