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Searching: photography





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Patent # Description
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...
US-4,087,574 Method of subbing plastic films
A method of subbing plastic films, particularly for use in photography, comprising applying an aqueous subbing composition to a surface thereof, the aqueous...
US-4,087,173 Document photography system
A document photography system photographs the obverse and reverse faces of a moving document by tracking the document with a moving lens. The motion of the lens...
US-4,086,585 System and camera for controlling depth of field in three-dimensional photography
In the exemplary embodiments of the invention disclosed, a system especially adapted for producing stereoscopic pictures in general photography includes a camera...
US-4,086,583 Light source and exposure control device for endoscopic photography
An endoscopic photography system including a side shutter 4 for a light source 3, a camera 5 including means for closing the side shutter 4 before the camera...
US-4,086,582 Exposure control device for a camera
An exposure control device in which the output of a light measuring circuit which produces an electrical signal corresponding to the brightness of an object is...
US-4,085,410 Photoflash mounting automatic light control camera
A camera accommodating film cartridges having structural signals differently configured according to the corresponding film speeds and selectively accepting a...
US-4,084,359 Survey apparatus
A survey system employs a ground-based extendible mast so that survey instruments, such as cameras, mounted at the top of the mast can attain heights comparable...
US-4,083,059 Automatic exposure control system for flash photography
In a camera provided with a day-light exposure range and with a flash exposure range, an automatic exposure control system for controlling the iris of the camera...
US-4,083,058 Flash and camera apparatus having a plurality of flash and daylight operation modes
Flash and camera apparatus integrally incorporating an electronic flashing device for firing a flash discharge tube and a photographic camera device with a fixed...
US-4,082,809 P-Benzoquinone diketals
P-Benzoquinone diketals of the formula ##STR1## wherein R is an alkyl group having from 1 to 4 carbon atoms or a halogen atom, preferably CH.sub.3, Cl or F....
US-4,082,681 Magnetic developer for electrostatic photography and process for preparation thereof
A developer for electrostatic photography comprising as indispensable components a fine powder of a magnetic material and a binder resin, said developer...
US-4,080,504 Novel photographic color coupling compounds
Novel magenta-forming 3-anilino-2-pyrazolin-5-one color couplers for use in silver halide photography are described wherein the anilino group carries an...
US-4,078,932 Hardening developers for silver halide photography
A hardening developer is described which comprises at least one silver halide developing agent and a reaction product of a dialdehyde hardener with an aliphatic...
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