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Searching: photography





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Patent # Description
US-4,150,882 Identification code generator for high speed motion picture photography
A method and apparatus for generating a variable pulse width code of at lt three binary coded decimal digits at a rate sufficiently greater than the film speed...
US-4,150,306 Blocking converter for flash equipment
A blocking converter is provided having a switching transistor controlled via a triggered monoflop with a defined on-time RC circuit which insures that the same...
US-4,149,887 Photography utilizing micro-capsular materials
A micro-capsular material for use as a photographic reproducing medium includes a plurality of micro-capsules distributed over a given surface. Each of the...
US-4,146,394 Filter pack correction method in color photography
A method of predicting the filter pack correction required to print a color ilm that has been exposed at any illuminant color temperature is provided without the...
US-4,141,176 Posable doll, means for movably mounting same and toy camera
In an apparatus for posing a doll, a platform is provided for supporting the legs of a doll and providing relative movement between the so-supported legs, the...
US-4,139,291 System and method for obtaining wide screen Schlieren photographs
A system for use in Schlieren photography including a large grating, a viewing screen adjacently related to the large grating, a small grating disposed in spaced...
US-4,139,097 Stackable container tray for storing and displaying flat objects
A semi-transparent, tray-like container having a flat bottom and substantially vertical side and end walls defining a storage space has flange-like projections...
US-4,138,264 Silver halide emulsion containing two equivalent type coupler for use in photography
A novel two-equivalent naphthol or phenol type cyan coupler is disclosed wherein the active position thereof has a split-off group which contains a bonding group...
US-4,137,188 Magnetic toner for electrophotography
An insulating magnetic toner useful as a one component developer for electro-photography consisting essentially of a ferro-magnetic material, a resin and a...
US-4,136,613 Fixing apparatus for electrostatic photography
A copy sheet is fed between a heated fixing roller and a nip roller to fix a toner image to the sheet. An applicator applies an offset preventing liquid to a...
US-4,134,767 Silver halide photosensitive material for color photography
A method of bleaching an imagewise exposed and then developed silver halide photosensitive material for color photography wherein said material contains a red...
US-4,134,766 Dye image forming process
Cyan couplers of the 2-equivalent type having the formula ##STR1## wherein C.sub.p, R.sub.1 -R.sub.6, Z, n, p and q are herein defined are described. These...
US-4,134,644 3D Color pictures with multichrome filters
This invention relates to a system for photographing, presenting and viewing 3D images, in which a set of mutually extinguishing multichrome A and B filters in...
US-4,133,602 Method for producing color structure change through interaction of light sources and application to improved...
Apparatus for controlling the interaction of light sources to produce a decodable composite image which image may have three dimensional characteristics and...
US-4,131,797 X-ray diagnostic installation for fluoroscopy and photography
In an illustrated embodiment, a switch control handle is shiftable from an upper position to a lower position to disconnect the fluoroscopic x-ray voltage and...
US-4,129,369 Parallax compensating device for the view finder in a camera
A camera which incorporates a supplemental lens that may be selectively used in combination with a normal picture-taking lens by moving a selector device...
US-4,128,324 Three-dimensional photography using incoherent light
A recording medium comprises a photographic plate and an aperture-raster plate parallel to but spaced from the photographic plate. The aperture-raster plate is...
US-4,126,877 Safety device for an exposure amount control equipment
The present invention relates to a safety device for exposure amount control equipment consisting of a camera and an electronic flash device, including a...
US-4,126,459 Thioether substituted 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-4,125,849 Three dimension camera having a film holder
A photographic camera for three dimension photography. A housing has an opening to the interior for light rays. Photosensitive material is located in...
US-4,124,291 Control of depth of field in three dimensional photography
In a camera for taking stereoscopic photographs, wherein a lenticular screen and photosensitive film are exposed to an object field through a wide effective...
US-4,124,276 Soft focus lens system
A variable soft focus lens system particularly adapted for photography is provided. The soft focus lens system includes at least two lens groups defining a...
US-4,123,271 Alkali metal dichromate as memory resistance improver for zinc oxide photoconductors in electrostatic photography
A process for preparing a photosensitive material for electrostatic photography having an improved memory resistance, which comprises a photoconductive layer on...
US-4,122,467 Camera with the shutter time control circuit for the flash light photography
The present invention relates to a shutter time control circuit of the type in which the shutter time is changed over into a predetermined value for flash light...
US-4,122,465 Device for indicating condition of exposure in an automatic control type electronic flash unit for flash...
An automatic control type electronic flash unit includes flashlight generator, a metering device for measuring the quantity of light emitted from the flashlight...
US-4,122,464 Diaphragm control device for flash photography
A diaphragm control device for flash photography is incorporated in a programming electric eye camera including an exposure control circuit and capable of...
US-4,117,335 X-ray diagnostic generator for the purpose of fluoroscopy and photography
In a fluoroscopic and photographic exposure installation where photographic exposure high voltage is normally automatically derived from the voltage setting...
US-4,114,984 Zoom lens barrel capable of macro-photography
The disclosure describes a zoom lens barrel capable of macro-photography on which a special switch ring is provided. The switch ring is externally operable and...
US-4,114,839 Aerial photography camera mount assembly
An assembly for mounting, supporting and releasably holding a vertically positioned aerial photography camera, and an angularly adjustable obliquely positioned...
US-4,114,667 Carrying pack for photography equipment
A flexible bag has a triangular bottom panel provided with openings at its vertices for receiving the legs of a tripod. Side panels of the bag surround the...
US-4,111,697 Novel antifogging and/or stabilizing compounds for silver halide photography
Photographic silver halide material developed in the presence of a novel antifogging or stabilizing compound which is present in the material and/or in the...
US-4,109,262 Three dimensional camera having lenticular screen moving apparatus
A photographic camera for three dimensional photography. A housing has an opening to the interior for light rays. The photosensitive material is immovably...
US-4,108,786 Magnetic dry developer for electrostatic photography and process for preparation thereof
A magnetic toner for electrostatic photography consisting essentially of spherical particles of a composition comprising a fine powder of a magnetic material...
US-4,107,712 Camera for taking three dimensional photographs having screen moving means
A photographic camera for three dimensional photography. The photosensitive material is positioned at a fixed location during the exposure cycle of the camera....
US-4,107,711 Photographic camera for taking three dimensional photographs and method and apparatus for forming trivision images
A photographic camera for three dimensional photography on fixedly positioned photosensitive material. A screen having a plurality of lenticular elements with...
US-4,104,183 Liquid developer for use in electrostatic photography comprising natural resins and natural resin-modified...
A liquid developer for use in electrostatic photography which comprises at least one kind of resin which is substantially insoluble in a carrier liquid...
US-4,103,160 Optical scanning equipment
Line-scanning equipment, especially for aerial photography of terrestrial scenes, has an infra red scanner which causes the scanning beam to sweep repeatedly...
US-4,101,914 Indicating devices for use in cameras
A camera adapted for use with a photoflash device, and having structure for manually setting a diaphragm aperture externally of the camera includes: a switch for...
US-4,100,553 Under-water photographic apparatus
The present invention relates to apparatus for photography under water, and is directed generally to the complete or partial elimination of the fluid-tight...
US-4,100,087 Pressure-fixing magnetic developer containing hydrogenated polystyrene binder for electrostatic photography and...
A pressure fixing developer for electrostatic photography comprising a finely divided magnetic material and a binder as effective components and consisting...
US-4,099,880 Method and an apparatus for stereoscopic measurement utilizing a three-dimensional image
A method and apparatus for stereoscopic measurement of an actual value of depth in a subject through its three-dimensional image obtained from two ...
US-4,099,847 Zoom lens system capable of close-up photography
Variable power lenses and correcting lenses are integrally moved a prescribed distance toward an object to be photographed without changing a spacing maintained...
US-4,099,221 Portable ceiling reflector for photography
A reflector assembly that serves as a portable ceiling for reflecting bounce flash to a photographed object. The assembly includes a support rod fastened to a...
US-4,098,783 Dye substituted cyclic 1,3-sulfur-nitrogen compounds as dye image-forming materials in photography
This invention relates to color providing compounds useful as dye image-forming materials in color photographic processes. These compounds comprise a complete...
US-4,096,498 Exposure propriety indicating device for flash-photography
An exposure propriety indicating device for flash-photography constructed with a circuit comprising a film sensitivity signal generating circuit, an aperture...
US-4,093,348 Lens system with frontal aperture stop
An objective lens system particularly adapted for photography with a frontal aperture stop is provided. The lens system includes four lens components including a...
US-4,092,544 X-ray photographic apparatus comprising light source and receiving device arranged to facilitate the alignment...
This invention discloses an X-ray photography device having an X-ray tube associated with a primary diaphragm for defining or limiting the X-ray beam by...
US-4,091,398 Electronic photoflash unit having remote control device transmitter function
Electronic photoflash unit has functions as a remote control device transmitter and as photoflash for flash photography. The photoflash unit decreases the amount...
US-4,091,396 Camera exposure control and indicating circuitry responsive to a signal from a flash device
Camera exposure control circuitry for automatically controlling exposure time or the diaphragm aperture in accordance with scene brightness, is provided with an...
US-4,089,590 Zoom lens barrel having macro-photographing mechanism
A zoom lens barrel having a macro-photographing mechanism including a main barrel carrying a control ring assembly which is divided into a first operating ring...
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