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Searching: photography





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Patent # Description
US-4,048,357 Method of coating multi-layer graphic film
In a coating method for preparing a multi-layer material for use in the graphic arts or in X-ray photography in which a web of a polyester film support has...
US-4,047,206 Single lens reflex camera
A single lens reflex camera system includes multiple replaceable mirrors, each designed to accomplish a specified function for different conditions of photography.
US-4,046,652 Process for preparing p-benzoquinone diketals
P-Benzoquinone diketals of the formula ##STR1## wherein R is H, an alkyl group having from 1 to 4 carbon atoms or a halogen atom, preferably H, CH.sub.3, Cl...
US-4,042,943 Stopping device for bellows and close photography ring
A stopping device is provided for stopping at an optional predetermined position the stop of a phototaking lens which has been in the fully open position when...
US-4,042,397 Light-absorbing dye for use in photography
Dyes are described corresponding to the following formula for use as light-absorbing dyes in silver halide photographic material: ##STR1## wherein: Z...
US-4,042,393 Silver halide emulsion containing two equivalent type coupler for use in photography
This invention relates to a method for developing an exposed silver halide color photosensitive material which comprises conducting the development in the...
US-4,041,504 Photographic exposure setting device
Photographic exposure setting device comprising an exposure time setting unit and two units for indicating insufficient and excessive illumination intensity...
US-4,040,587 Camera cradle tilt mechanism
A camera cradle tilt mechanism for professional motion picture photography employs a flexible toothed belt having its ends fixed to an arcuate undersurface of...
US-4,040,071 Method and apparatus for making stereoscopic pictures
The invention relates generally to stereo photography and particularly to a simple method and apparatus which enables an unskilled individual to produce...
US-4,038,082 Image-receiving material for color diffusion transfer comprising PVA and polymethylol compounds
An image-receiving element for color diffusion transfer photography for use with a photographic element containing at least one silver halide emulsion layer...
US-4,034,667 Hot stamping machine with rotatable head
The present disclosure is directed to a hot stamping machine with a rotatable head for imprinting information on each individual frame of a roll of negatives or...
US-4,034,384 Exposure meter circuit of camera with matching network for flash device
The present invention relates to an exposure meter circuit of a camera with a matching network for a flash device with which camera auxiliary light photography...
US-4,032,538 1,3-Disulfonylcycloalkane
1,3-Disulfonylcycloalkanes substituted in the 2-position with at least one hydrogen atom are employed as silver halide complexing agents in both conventional and...
US-4,032,463 Liquid developer for use in electrostatic photography and preparation of same
Liquid developers for use in electrostatic photography in which toner particles comprising pigment and specific polymer mixes having a particle size of from 0.2...
US-4,032,224 Sound recording and reproducing system for sound motion picture photography
A sound recording and reproducing system comprising a motion picture camera in which there is a synchronization system for recording segments of sound from a...
US-RE29,276 Lens attachment for flash-light photographing
In an automatic flash camera having a lens with a rotatable focusing ring, a lens attachment coacts with the focusing ring to control the camera. In the...
US-4,028,353 Novel chemical compounds
The present invention relates to photography and, more particularly, to a novel spectrally (optically) sensitized radiation recording photographic element which...
US-4,025,339 Electrophotographic film, method of making the same and photoconductive coating used therewith
An electrophotographic film which is not only capable of being utilized for the same purposes as conventional xerographic and electrofax members but it also...
US-4,025,170 Retro-focus type wide angle objective lens
A retrofocus type wide angle objective lens comprising a negative lens group N and a positive lens group P having a diaphragm therein arranged in this order from...
US-4,023,189 Wide angle fundus illumination and photography apparatus
A wide angle instrument for illuminating, observing and photographing the fundus of the eye is provided. The instrument has a focus tube containing spaced...
US-4,021,824 Flash light photographic system for camera
The present invention relates to the flash photographic system for camera which is characterized in that the system presents a safety device for preventing...
US-4,021,416 Thiol polymers
This invention relates to styrene polymers containing pendant aminoethanethiol moieties which are useful as complexing agents for silver ions and/or soluble...
US-4,021,247 Method of dispersing organic compounds useful in photography
A method for dispersing organic compounds which are substantially insoluble in water and are used in photographic materials, such as chemical sensitizers (except...
US-4,021,241 Diffusion transfer processing solutions with carboxymethyl hydroxyethyl cellulose
The present invention relates to photography and, more particularly, to diffusion transfer process photographic film units which comprise a photosensitive...
US-4,019,042 Lighting device for photograph or motion-picture photography
In a device for the front lighting of a subject around a camera lens comprising a reflector, the summit of the reflector is truncated and provided with an...
US-4,018,608 Infra red photography with silver halide films using infrared and visible light exposures
A process for photographing infra red events onto silver halide film including the steps of focusing the infra red radiation directly onto the film to alter the...
US-4,018,519 Composite photography apparatus and method utilizing a polarizing beam splitting unit
A special polarizing beam splitting unit is employed in a composite photography system which utilizes an autocollimating screen having the capability of...
US-4,018,514 Apparatus for retinal photography
Apparatus for retinal photography comprising an energy supply unit, a hand lens, a foot-operated control unit, and headgear comprising an indirect ophthalmoscope...
US-4,016,575 Exposure control system for flash photography
A flash photographic exposure control system for a camera having an electrically timed shutter is provided with an additional electronic or mechanical timing...
US-4,009,951 Apparatus for stereoscopic photography
Photographic apparatus employing a single color filter for use in conjunction with a camera to produce a decodable composite image of a scene, which image has a...
US-4,009,167 N-(lower alkyl sulfonyl-methyl sulfonyl)-piperazines
This application is directed to compounds of the formula ##STR1## wherein R.sup.1 is lower alkyl; R.sup.2 is hydrogen, lower alkyl or --CH.sub.2 ).sub.m...
US-4,009,041 Fogged, direct-positive silver halide emulsion containing a gallium sulfide semiconductor
The present invention relates to photography and, more particularly, to a novel radiation recording photographic element which comprises a direct positive...
US-4,007,487 Electronic composite photography with color control
Improved electronic compositing procedures and apparatus are described, ed typically on the blue screen process and suitable for processing motion pictures of...
US-4,007,466 Electrical system having a photoelectric converter to be used in photography
An electrical system to be used for photographic purposes. The electrical system has an input circuit for providing a given input signal as well as an output...
US-4,006,487 Photomicrographic illuminator
An illumination system for photomicrography includes direction of the light for illumination of the object through a fiber optic, the exit end of which replaces...
US-4,006,150 Alkylsulfonyl methyl-substituted pyridine N-oxides
This invention is concerned with pyridine N-oxides substituted in the ortho and/or para position with an alkylsulfonylmethyl group which find utility in...
US-4,005,444 Exposure control system for flash photography
A photographic flash exposure control system for a camera associated with a flash device. In conformance with a preselected shutter interval, an effective...
US-4,003,744 Photographic products with photosensitive layers of same spectral sensitivity and different speed
The present invention relates to photography and, more particularly, to diffusion transfer process photographic film units which comprise a photosensitive...
US-4,003,068 Extension tube for use in close-up photography
An extension tube inserted between a single lens reflex camera body and an interchangeable objective lens barrel to extend the photographable range intrinsic to...
US-4,002,313 Aircraft conformal load carrying pallet
A form-fitting or conformal load carrying pallet for aircraft to improve the load carrying capacity of aircraft where the load may be fuel, electronic gear,...
US-3,999,991 Thioindioxyl azo dye developer for diffusion transfer process
A dye developer for silver halide photography comprising both a dye moiety represented by the following general formula (I): ##STR1## wherein R represents a...
US-3,999,990 Imaging by light-enhanced vaporization
An imaging method involves a substrate having a coating which undergoes a photochemical conversion upon being irradiated to yield only products whose vapor...
US-3,999,195 Camera adjustable exposure control adapter
An adjustable exposure control adapter for cameras is described which includes a light producing source, such as a LED, which is mountable in juxtaposition to a...
US-3,996,215 Styryl and butadienyl sulfa dye and process of producing the dye
A styryl and butadienyl dye suitable as a filter dye or antihalation dye for photography having the formula ##STR1## wherein R represents a lower alkyl...
US-3,994,573 High aperture catoptric system
A catoptric system adapted for X-ray fluoroscopic photography comprises a spherical concave reflector disposed to reflect fluorescence light coming from the...
US-3,994,572 Varifocal lens system with macro-photography capabilities
A macro-photography varifocal lens assembly is provided for attachment to a camera body. The lens assembly can include a first lens group of negative refractive...
US-3,994,558 Binocular microscope with improved monocular photographic and measuring capability using movable objective
The main objective of the microscope is shifted from the stereoscopic viewing position to a position in which its optic axis coincides with the optic axis of one...
US-3,994,007 Automatic flash photography apparatus
The disclosed automatic flash photography apparatus operates with a camera having a shutter in which a diaphragm blade serves as a shutter blade, and the...
US-3,993,560 Method and apparatus for monitoring cellular activities
A method and means are provided for observing and recording by time lapse photography the growth of cells such as cancer cells outside the human body while...
US-3,992,084 Zoom lens system also capable of ultra-closeup photography
A zoom lens system which is also capable of ultra-closeup photography comprises in succession, as viewed from the object side of the lens system, a focusing lens...
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