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Searching: photography





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Patent # Description
US-4,579,803 Liquid developer for electrostatic photography
A liquid developer for electrostatic photography is described, containing, (i) a toner containing a resin as a main component and (ii) a copolymer comprising two...
US-4,578,348 Hydrolyzed azolium speed enhancing/fog-inhibiting agents for silver halide photography
Radiation sensitive silver halide photographic elements are disclosed which are protected from fog by hydrolyzed quaternized chalcogenazolium salts of middle...
US-4,576,470 Enlarger for use in photography
An enlarger for use in photography capable of printing a color copy from a color original film includes a light source for generating a plurality of primary...
US-4,576,463 Developing apparatus for electrostatic photography
A toner charging member to which a toner is conveyed and supplied is located in the vicinity of a photoconductive element which is to carry an electrostatic...
US-4,575,225 Color enlarger
A color enlarger for use in photography capable of printing a color copy from a color original film includes a plurality of source lights for separately...
US-4,575,218 Developing apparatus for electrostatic photography
A toner charging member to which a toner is conveyed and supplied is located in the vicinity of a photoconductive element which is to carry an electrostatic...
US-4,572,640 Photographing operation control device for camera
The present invention relates to a camera having an automatic focusing device, particularly designed so that the shutter release operation is carried out only...
US-4,570,205 Strobe apparatus
A lower part of a reflection mirror is cut away to admit light flooding downwards in a special photographing situation, for instance, close-up photography, by...
US-4,569,580 Flash photographing system
A flash device for a photographic camera either inhibits a flashing action or shifts the control mode of the camera from flash photography to daylight...
US-4,568,778 Process for producing tert-amylphenols
A process for producing tert-amylphenols is described, comprising reacting isoamylene with phenols in the presence of an inorganic solid acid catalyst or an...
US-4,568,752 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-4,565,731 Image-forming member for electrophotography
An image-forming member for electro-photography has a photoconductive layer comprising a hydrogenated amorphous semiconductor composed of silicon and/or...
US-4,563,705 Automatic focus controlling apparatus and method
In order to effect an automatic focus control in an image pick-up apparatus, a photography lens for forming an image of the object onto a two-dimensional solid...
US-4,563,627 Switching system for high voltage battery pack
There is disclosed herein a rechargeable battery pack for use with electronic devices, such as electronic flash units used in photography, and wherein the...
US-4,558,939 Flash photography system
A flash photography system for a photographic camera and a flash device adapted to be connected thereto with the camera providing an aperture value output for...
US-4,557,570 Camera assembly for three-dimensional photography
A camera assembly is provided for photographing a scene or subject from two slightly different positions with controlled three-dimensional effects for subsequent...
US-4,554,460 Photodetector automatic adaptive sensitivity system
A photodetector system for generating a series of digital value signals indicative of light intensity and particularly adapted for use in computer enhancement of...
US-4,554,244 Silver halide photosensitive materials for color photography
There is disclosed a silver halide photosensitive material for color photography which comprises a phenol type cyan coupler having the formula: ##STR1## ...
US-4,552,444 Synthesis color photographic map and method of making same
A synthesis color photographic map, on a predetermined scale, covering a wide geographic area. It is formed of a number of color photographic base maps each...
US-4,550,996 Flash photography system
A flash photography system using a first aperture value output calculated from a desired diaphragm aperture value for flash light photographing with data...
US-4,548,470 Projection screen
An improved projection screen is provided having particular application for use in front projection composite photography. A substrate screen backing is provided...
US-4,548,468 Load-bearing rear-projection screen
The invention pertains in general to the art of motion-picture photography and in particular to rear-projection "process" photography, providing a rigid...
US-4,547,057 Flash photographic apparatus
In a flash photography apparatus of the type determining an aperture for flash photography based on an integrated value of the reflected light quantity received...
US-4,545,666 Light emission blocking device of a camera capable of effecting flashlight photography
A camera usable with a flash unit and having a roll film loaded in the camera housing thereof comprises release means operable by an operator for photographing...
US-4,544,254 Camera with a display device for displaying both object distance informations and coupling range informations
A camera provided with a display device that displays changing of the coupling range of a strobe as the amount of charge stored on a main capacitor in the strobe...
US-4,542,975 Camera flash light control circuitry
In a flash photography system including an electronic flash device adapted to be combined with a camera which is adapted to transmit first and second signals to...
US-4,542,974 Flash photography apparatus
In the disclosed flash unit, a preliminary flash for evaluating a proper exposure precedes a main flash. A flash exposure control apparatus respond to tilting of...
US-4,542,959 Color correction filter and method of taking underwater photographs therewith
A color correction filter is disclosed, which is especially adapted for use in underwater photography. The filter has a transparent element which passes...
US-4,541,702 Automatic focus adjusting device
Automatic focus adjusting device comprising a range finding means which generates a signal corresponding to a distance to an object to be photographed; means for...
US-4,541,021 Electronic still camera
An electronic still camera which is capable of taking a still picture purely electronically. Such a camera employs a magnetic tape recorder of audio grade but is...
US-4,536,848 Method and apparatus for colored computer graphic photography
Method and apparatus for making and photographing computer graphic colored images by defining each computer graphic colored image as a plurality of constant...
US-4,534,638 Exposure control device for camera
The disclosed camera has shutter blades which also serve as diaphragm blades and an auxiliary light-metering aperture arranged, upon operation of the shutter...
US-4,532,202 Coupler for photography
There is disclosed a coupler for photography represented by the formula: ##STR1## wherein R.sub.1 represents a branched alkyl group having 3 to 5 carbon ...
US-4,529,301 Color print system
A system for optimizing the printing of photographs. For color prints, a piece of photography paper is progressively and sequentially exposed to varying amounts...
US-4,525,054 Camera
The disclosed camera permits selection of one exposure control mode along one program line based on brightness and at least another control mode along another...
US-4,519,684 Photo flash lamp
An improved photo flash lamp, especially suited for medical photography includes a housing having a viewing tube extending therethrough and protruding...
US-D278,913 Combined clamp and table stand for photography
US-4,516,157 Portable electronic camera
A video recording device is arranged to be worn by the user like a pair of spectacles. In the recording mode, the scene in front of the user is recorded on a...
US-4,512,644 Flash device
In the disclosed flash device, a flash portion is shiftable from an ordinary flash position to a bounce flash position. Automatically controlling the...
US-4,511,233 Charge control device in a flash device for a camera
A flash device for photography includes a DC/DC converter for boosting a DC power source voltage and applying a voltage to a main capacitor for supplying an...
US-4,510,525 Stereoscopic video imagery generation
Flying spot scanner technology is combined with stereo photography in motion to produce two channels of video imagery which can be optically combined to produce...
US-4,507,386 Silver halide photographic emulsion
A silver halide photographic emulsion containing a coupler for photography, comprising silver halide particles in said emulsion consisting essentially of 2 mole...
US-4,505,566 Range focusing system for a camera
A camera provided with a fixed focusing lens as a main photographic wherein a range finder is provided for setting at two distances, an oscillating lever is...
US-4,504,142 Photography printing frame
An improved contact photo vacuum frame includes a specially constructed inflatable bladder which backs up the pressure blanket. The bladder is divided into a...
US-4,504,129 Photography adaptor assembly for a slit lamp examination unit
An assembly for adapting any of several different models of commercially-available slit lamps (10) into an optic examination unit capable of being used for...
US-4,502,771 Camera with a voice transmitting device
A camera with a voice transmitting device able to detect necessary informations for judging various states of the camera at the time of photography and to make a...
US-4,501,481 Flash photographing system
A flash device for a photographic camera either inhibits a flashing action or shifts the control mode of the camera from flash photography to daylight...
US-4,500,191 Photography modes switchable camera
A camera including an objective lens device whose focal length is manually changeable, is automatically switched from a natural light photography mode to a flash...
US-4,500,190 Camera system including flash and status indicating control circuit
A camera flash device is provided for photography requiring the use of a flash by transmitting plural information from the flash side to the camera side. The...
US-4,497,562 Exposure control device for flash photography
An exposure control device for flash photography using a first program signal circuit 5 for generating signals representative of a shutter speed and a diaphragm...
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