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Searching: photography





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Patent # Description
US-4,073,580 Fade photographing control apparatus for cine camera
A fade photographing controlling apparatus for a cine or movie camera comprises a rotary member adapted for alternate rotation through 180.degree. in a first...
US-4,072,973 Camera signal system for portrait taking
A camera signal system for portrait taking in which a sensory signal alerts animate subjects of photography, such as group-portraiture subjects, at a ...
US-4,072,960 Camera with battery testing device
A camera incorporating a light-meter and a battery-powered lamp for indicng when the level of incident light is so low as to be unsuitable for photography also...
US-4,072,525 Silver halide photographic material containing two-equivalent color coupler
A photographic color coupler in which a hydrogen atom at the coupling position capable of coupling with an oxidation product of an aromatic primary amine...
US-4,072,522 Method of treating photoconductive zinc oxide
Electronic-photography light-sensitive material provided with a light-sensitive material layer suitable for rendering of continuous gradation of tones.
US-4,071,850 Camera lens barrel suitable for flash photography
A camera lens barrel suitable for flash photography, wherein flash guide numbers are marked either on the distance adjusting ring or the diaphragm value...
US-4,070,191 Silver halide emulsion containing colored magenta coupler for photography
A coloured magenta coupler for photography is disclosed which is represented by the following general formula: ##STR1## wherein R is substituted phenyl,...
US-4,068,931 Reflector including light filter for photographic use
A filter supporting structure fitted to a reflector and light source for use in photography is shown for positioning the filter medium between the light source...
US-4,068,245 Exposure control system for flash photography
A flash exposure control system comprising a flash lighting unit, a battery circuit connected to said flash lighting unit to energize said flash lighting unit...
US-4,066,346 Motion picture camera with a built in color conversion filter
The present invention relates to a motion picture camera which includes a color conversion filter for adapting the tungsten type film to the daylight...
US-4,063,092 Selective image area control of x-ray film exposure density
A system for accurately determining the exposure density required for x-ray photography of a particular area of interest is provided. The light received from an...
US-4,062,683 Photographic material containing 3-anilino-5-pyrazolylalkylcarbonate or arylcarbonate couplers
3-Anilino-5-pyrazolyl alkylcarbonates and arylcarbonates are described for use in silver halide color photography as color coupler precursor compounds containing...
US-4,061,498 Photographic material containing 2-acyl-2-pyrazolin-5-on-couplers
2-Acyl-3-pyrazolin-5-one couplers are provided for use in color photography which upon color development form 2-pyrazolin-5-one couplers capable of coupling with...
US-4,057,830 Electronic photography system
A completely electronic system for recording and subsequently displaying still life pictures includes an optical-electronic transducer for generating electronic...
US-4,054,453 Lippmann film with reflective layer
A film for use in Lippmann photography is formed with a photosensitive emulsion on a transparent base and a separable reflective layer adhering to the emulsion....
US-4,053,756 Illumination light-source device for an endoscope or the like
A light source for an endoscope includes a lamp for providing conventional illumination, a cold mirror for condensing the conventional illumination onto a light...
US-4,052,607 Versatile light diffuser
A uniquely configured and constructed light diffuser device which is versatile in the sense that it is easily associated with various light sources ubiquitously...
US-4,052,212 Photographic silver halide emulsion containing 2-equivalent cyan coupler
Cyan couplers of the 2-equivalent type, useful in photography are described. These compounds are characterized in that they have at least one divalent group of...
US-4,052,126 Motion picture camera
A motion picture camera having a film transport mechanism driven by an electric motor having an electronic speed control circuit which may be controlled by the...
US-4,051,494 Photographic camera with built-in strobo flash light device
In a photographic camera provided with a built-in strobo flash light device, the distance from the strobo flash tube to the optical axis of the taking lens of...
US-4,051,493 Flash photographing device
In a flash photographing device which comprises a camera body and a flash gun adapted to be connected to the camera body during photography, there is provided a...
US-4,048,540 Electronic flash unit serving both as transmitter of a remote control and flash unit for flash photography
In an electronic flash unit serving both as the transmitter of a remote control device and a flash unit for flash photography, there is provided a power source,...
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...
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