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Searching: photography





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Patent # Description
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...
US-4,077,042 Control means for photoflash photography system
A photoflash photography system includes a camera separably housing individual film cartridges carrying indicia, physical or electrical, representing the...
US-4,076,404 Method of and apparatus for electronic color photography and photosensitive member used for the same
The photosensitive member consists basically of a supporting base, a photoconductive layer and an insulating layer dyed in a desired color for providing a color...
US-4,075,666 Magnetic tape recorder
An arrangement for slow-speed recording of video signals on magnetic tape. Long recording time capacity and economy of tape are achieved by a reduction of tape...
US-4,075,021 Photosensitive material for color photography
The present invention discloses a multi-layer photosensitive material for color photography in which a compound capable of reacting with an oxidation product of...
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...
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