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Searching: photography





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Patent # Description
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...
US-3,990,785 Anamorphic zoom lens
The present invention relates to an anamorphic zoom lens of rear system intended for photography or projection, which, seen from the object, consists of an...
US-3,990,087 3-Dimensional camera
This invention relates to a reflex camera device having a single lens for the photography of right and left images from an object space transmitted as first and...
US-3,986,877 Development promoting compounds for silver halide photography
A method is described for developing silver halide emulsions wherein development is activated by incorporating in the developing composition or the emulsion a...
US-3,985,425 Polarizing beam splitting unit
The polarizing beam splitting unit comprises a filter in the form of a layer of polarizing material which passes light in only one plane. This polarizing layer...
US-3,982,947 Fog-inhibitors for silver halide photography silver halide photographic material containing an iodo benzene...
Photographic silver halide materials are described which comprise as antifogging agent a compound of the formula: ##SPC1## Wherein: X is a hydroxy or carboxy...
US-RE28,956 Latent image photographic system
This invention relates to compositions which are sensitive to light and suitable for photography and photographic reproduction purposes. More particularly, the...
US-3,978,496 Automatic flash-photographing arrangement
An automatic flash-photographing arrangement whereby flash-photography is automatically carried out at a preset shutter speed when brightness of an object is...
US-3,976,647 N-(lower alkyl sulfonyl-methyl sulfonyl)-piperazines
This application is directed to compounds of the formula ##EQU1## wherein R.sup.1 is lower alkyl; R.sup.2 is hydrogen, lower alkyl or ##EQU2## wherein...
US-3,976,489 Silver halide photographic products with semiconductor sensitizers
The present invention relates to photography and, more particularly, to a novel radiation recording photographic diffusion transfer process film unit which...
US-3,975,423 Alkylthioalkyl-substituted alkylsulfonylacetonitriles
This application is directed to compounds of the formula ##EQU1## wherein R.sup.1 and R.sup.2 each represent lower alkyl and m is a whole number 2 to 5,...
US-3,974,509 Automatic exposure control circuit for a camera
An automatic exposure control circuit for a camera or the like includes a memory circuit comprising a series connection of a capacitor and an impedance element...
US-3,972,716 Color electrophotography using encoded multicolor information
A system for electrostatic photography using a camera having an aperture formed in one side for imaging light onto a photoconductive insulating layer positioned...
US-3,971,954 Ultraviolet camera system for dental photography and mouthpieces therefor
A source of ultra violet light is directed onto the teeth of a patient via a mouthpiece which engages the gums above and below the tooth lines. A camera is...
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