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Searching: photography





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Patent # Description
US-4,266,861 Eye fundus camera
An improved eye fundus camera for photographing the fundus of a patient's eye is disclosed. Three separate energy sources are provided which include a first...
US-4,264,698 Developer for electrostatic photography and process for preparation thereof
A developer for electrostatic photography consisting essentially of a dry blend of (A) substantially spherical fixing magneto-sensitive particles of a...
US-4,264,175 Focusing device in camera equipped with both standard and telephoto lenses
In a camera equipped with both a standard lens and a telephoto lens which may be arbitrarily selected for exposures by manipulating a first control knob, a...
US-4,264,168 Projection device, especially for photography, motion pictures and television
A housing which is adjustable for height and within which is placed an object to be projected onto a screen also contains a light source and a reflecting system,...
US-4,262,997 Exposure information indicating device
An exposure information indicating device for use in photography includes a detecting section for detecting various known information values such as brightness...
US-4,261,495 Bag construction
A shoulder bag such as a photography case adapted to be suspended from a shoulder of a bearer of the same is suspended by means of a strap engaging opposed pivot...
US-4,259,423 Means and method for color photography printing
A color photography printing process prints, a test print on the basis of color intensities of three color ranges transmitted through a small selected area of a...
US-4,256,995 Electronic pre-emission flash device
An electronic flash device capable of emitting a flash light of a regulated level over a considerable duration of time, prior to flash firing for emitting a...
US-4,255,510 Development restrainer precursors for photographic elements
Photographic elements, assemblages and processes for color diffusion transfer photography are described wherein certain azole compounds having at least two...
US-4,255,033 Universal focus multiplanar camera
Conventional cameras and other optical instruments produce images upon one plane only. Objects at differing ranges from the lens of such cameras cannot appear...
US-4,254,201 Pressure sensitive adhesive toner of clustered encapsulated porous particles for use in electrostatic photography
A pressure sensitive adhesive toner for use in electrostatic photography which consists essentially of porous aggregates. Each aggregate consists essentially of...
US-4,252,441 Arrangement for measuring exposure in photography with an electronic exposure meter and adapter
An arrangement for measuring exposure in which an adapter is attached to an electronic exposure meter. The adapter has at least three plugs mating with...
US-4,249,825 Method and apparatus suitable for ocular blood flow analysis
Glaucoma and other diseases may be detected by the analysis of angiograms to determine ocular blood flow. Using rapid sequence photography an ocular image is...
US-4,249,815 Camera with means for allowing photography under low light conditions
A standard camera with means for using non-imaging light for activating the film when taking pictures in low light conditions. The film activating means consists...
US-4,249,805 Composite photography system
A composite photography system of a registered matte type having foreground and background camera optical systems is provided. The respective images from each...
US-4,248,961 Material for color photography
Light-sensitive recording material for color photography is provided which contains, in at least one silver halide emulsion layer, a yellow coupler of the...
US-4,247,622 Photodeformable polymeric compositions
The invention is directed to polymeric materials which undergo deformation upon exposure to actinic radiation. These polymeric materials contain at least one...
US-4,247,177 3D Multichrome filters for spectacle frames
This invention relates to a system for photographing, presenting and viewing 3D images, in which a set of mutually extinguishing multichrome "C" and "D" filters...
US-4,246,486 X-ray photography device
A focus alignment system for X-ray photography devices is provided for use with such devices where the film holder is independent of the X-ray source. The X-ray...
US-4,245,025 Transfer sheet and process for preparation thereof
A transfer sheet for electrostatically transferring thereon an electrically conductive or electrically semi-conductive toner in electrostatic photography or...
US-4,244,644 Method and apparatus for series photography of a subject in motion
A method and apparatus for series photography using a "still" camera for taking a series of discrete shots on a single frame of film of the subject in motion...
US-4,243,881 Time-resolved infrared spectral photography
An intense broadband continuum light pulse of uniform spectral intensity and short time duration is generated. This continuum pulse is then downconverted in...
US-4,242,434 Toner composition for multiple copy electrostatic photography
In controlling the operation of an electrostatic apparatus to produce a large number of copies from an electrostatic image in a multiple copy process there is...
US-4,242,428 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-4,239,356 System for the performance of photographing with a motion picture camera, still picture camera or television camera
A system for performance of photographing with moving picture cameras, still picture cameras or television cameras, particularly of direct sound - movie picture...
US-4,238,564 Recording material for color photography
Recording material for color photography, which contains, in at least one silver halide emulsion layer, at least one yellow coupler of the formula ##STR1## ...
US-4,238,153 Automatic focus adjusting device for cameras
A camera selectively settable to a daylight photography mode and to a flash photography mode includes an automatic focus adjusting device having a range finder...
US-4,236,799 Unwinding-mechanism releasing device for use in a camera
Shifting of the image plane during multiple exposure photography is prevented by releasing the unwinding button and a film locking member after the shutter...
US-4,232,685 Larynx stroboscope for photography
A larynx stroboscope device capable of photography following the anode or cathode terminal of a flash discharge tube is connected to a photographing ...
US-4,232,113 Liquid concentrated developer composition, and confection ready to mix with water including it, for use in...
Developer for use in color photography confectioned in a plurality of concentrated compositions in which one first concentrated composition is a liquid...
US-4,232,107 Photographic material suited for use in diffusion transfer photography and method of diffusion transfer...
Said material contains a quinone-type compound which corresponds to one of the formulae (A) or (B) and which is capable in reduced state and under alkaline...
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...
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