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Searching: photography





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Patent # Description
US-4,456,342 Zoom lens barrel capable of close up photography
A zoom lens barrel has a focusing operating member and a zooming operating member and a blocking member. When the blocking member is at a first position,...
US-4,455,067 Method of modifying slide transparencies so as to provide uniform illumination in angular projection
Photography, particularly, a method of modifying slide transparencies so as to eliminate distortion and to provide uniform illumination in oblique projection,...
US-4,452,513 Zoom lens capable of close range photography and method of focusing the same to a short distance
A zoom lens has, in succession from the object side, a first lens group as a convergent focusing group, a second lens group as a divergent magnification changing...
US-4,451,559 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-4,451,555 Antifogging compounds and their use in silver halide photography
The present invention deals with novel antifogging compounds and their use in a method of photographic reproduction comprising developing a photographic material...
US-4,449,804 Interval timer device
The present invention relates to an interval timer device for a camera, particularly an interval timer for producing a release signal for operating the shutter...
US-4,449,225 Method to be used in panoramic X-ray photography and an apparatus for carrying out the method
The invention relates to carrying out a pre-adjustment, before photographing is started, in panoramic X-ray photography using an X-ray device which performs a...
US-4,448,500 Telescope guider
Apparatus is disclosed for guiding a telescope during long-exposure astronomical photography. A reflecting prism or mirror is inserted into the peripheral...
US-4,448,495 Zoom lens system capable of very close range photography
A zoom lens system capable of very close range photography comprises, in succession from the object side a convergent first lens group stationary during zooming...
US-4,447,896 Method of and apparatus for combined optical and sonar detection and recording of objects
This disclosure is concerned with problems of energy conservation and more effective utilization at desired critical times only in, for example, sonar-triggered...
US-4,446,506 Photographic light diffuser
A uniquely configured, constructed photographic light diffuser device for association with a photographic light source, which is versatile in that it is easily...
US-4,445,771 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-4,444,866 Photographic light-sensitive material with forced oxidized carbon black
Photographic light-sensitive materials particularly useful in connection with instant photography are disclosed. The disclosed photographic materials include...
US-4,441,799 Camera with a lens protective cover
A camera with a lens protective cover includes switching means which turns a power supply of an electronic flash on to establish a flash photography mode for the...
US-4,441,774 Flash device of 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-4,437,734 Lenses capable of close-up photography
A lens system comprises a converging first lens group, a diverging second lens group and a converging third lens group arranged in this order as viewed from the...
US-4,437,117 X-ray television installation for monitor photography
An exemplary embodiment comprises an x-ray tube, an x-ray image intensifier, a television camera, a photographic camera, and a monitor system, which includes a...
US-4,435,057 Exposure control device for cameras
A camera capable of AE-lock photography wherein an output of a light measuring circuit is stored in response to a manual operation at an arbitrary time prior to...
US-4,432,624 Delay timer for a camera
A relatively inexpensive electronic delay timer particularly suitable for portable use in such applications as control of a camera shutter. The timer can be used...
US-4,428,030 Modular light-diffusing or reflecting plastic panel
This modular light-diffusing or reflecting plastic panel, notably for photography, motion-picture and television, comprises a cut panel (1), of semi-rigid...
US-4,427,278 Flash photography system and electronic flash device for use in the system
A flash photography system includes an electronic flash device capable of light measurement for automatic flash light control and a camera capable of automatic...
US-4,425,033 Camera employing a flash illumination device and a flash photographing system
An interchangeable-lens camera is usable with a flash unit which stops the flash on the basis of the object distance and transmits a signal corresponding to a...
US-4,423,470 Lens barrel suitable for flash photography
In a lens barrel to which a flashlight-emitting device is mounted or may be mounted and which enables a very proximate object to be photographed, there is...
US-4,422,742 Photographing mode switching device for a camera
A photographing mode switching device for a camera includes a position detecting member associated with a mode switching member and a mounting detecting member...
US-4,420,515 Metallization process for protecting documents of value
A process for preventing the counterfeiting of valuable documents through use of photography, photocopying techniques, or other methods of counterfeiting. The...
US-4,417,791 Process for composite photography
A reverse blue screen process for travelling matte cinematography, which comprises the formation of travelling mattes by pre-coating models or other foreground...
US-4,417,399 Device for the calculation of the characteristics of rectilinear geometric shapes
Device for the calculation of the geometrical characteristics of rectangles for the framing of various objects, usable especially in photography, architecture,...
US-4,412,346 X-Ray photography apparatus
In an X-ray photography apparatus of this invention, an X-ray tube and an image receiving device are attached to two tilting members which are each rockably...
US-4,410,247 Motion picture camera
A three-motion picture camera is equipped with a shutter opening angle adjusting device capable of changing the opening angle of a shutter including a plurality...
US-4,410,157 Photography stand system
A photography stand system is disclosed assembled from elongate support members into either a tripod or framework structure. The elongate support members form...
US-4,409,646 Multiple-effect light source, especially usable as a projector for photography, motion pictures and television...
A light source usable as a projector for photography, motion pictures, television, or as a light panel, or as a lighting apparatus. This light source comprises a...
US-4,409,645 Combination flashlight and auxiliary power pack
An auxiliary power pack and/or flashlight which accommodates spent instant photography film cartridges which include a substantially flat battery. A battery and...
US-4,408,855 Automatic focus adjusting device for use in a camera
An automatic focus adjusting device for a camera is provided that detects the contrast of a target object and generates an appropriate signal. If the target...
US-4,407,575 Stereoscopic photography
A method of forming a stereoscopic pair of images on a length of photographic film is provided in which one image is exposed adjacent one longitudinal side of a...
US-4,407,273 Raising means for guiding an implement of an endoscope
In an endoscope having an optical fibre bundle for illumination communicating with an illumination window, an optical fibre bundle for observation communicating...
US-4,406,533 Flash photograph system
A flash-light photographic system consisting of a camera and a flash device which are arranged independently of each other. The camera is provided with a holding...
US-4,406,532 Wide angle color photography method and system
A method of color imaging involves the steps of (a) forming an image while introducing a predetermined chromatic difference in lateral magnification, (b) storing...
US-4,405,920 Enhancing the perceptibility of barely perceptible images
Pictures, images, etc., in which a pattern or object to be observed is obscured by "noise", such as certain pictures or images obtained by video transmissions,...
US-4,402,589 Correct exposure annunciating device
A correct exposure annunciator has an element to indicate a correct exposure. The indicating element is energized in normal flash photography to indicate correct...
US-4,402,588 Automatic photograph labeler employing camera with passive display
A camera (10) has a passive display device, preferably a liquid crystal display panel (26), positioned in front of one edge of the film (24), in the path of...
US-4,400,617 Correction circuit of a halftone dot area rate detector
A correction circuit of a halftone dot area rate detector wherein a relation between a detected halftone dot area rate and a light transmittance or reflectance...
US-4,395,101 Apparatus for presetting photographing distance for camera
An apparatus for presetting the photographing distance for a camera is responsive to a movement of flash photography operating means to operate switch operating...
US-4,395,094 Large aperture ratio photographic lens with means for correcting aberrations
This specification discloses a large aperture ratio photographic lens with means for correcting aberrations comprising a forward group including at least one...
US-4,394,074 Fiberoptic-lighted optical apparatus
A fiberoptic-lighted optical apparatus for use in combination with a camera to photograph the convex surface of the iris of the eye for optimum depth of field...
US-4,392,724 Lens system capable of short distance photography
Compact lens systems capable of continuously effecting infinity photography to high magnification proximity photography and having a large aperture ratio and...
US-4,390,451 Concentrated aqueous metal aldonate and/or ammonium aldonate composition
The present invention relates to a concentrated aqueous composition of metal aldonate and/or ammonium aldonate. Part of the aldonate is dissolved and part of it...
US-4,387,252 Process for the preparation of polyhydric phenols
The invention relates to an improved process for the preparation of polyhydric phenols by hydroxylation of phenols with peroxidic hydroxylating agents and in the...
US-4,386,834 Kirlian photography device
A battery-powered corona discharge photography device for holding a photographic recording medium adjacent an electrode, with a specimen in contact with the...
US-4,386,145 Fabrication of arrays containing interlaid patterns of microcells
In the forming of microcellular arrays, such as those useful in photography, a closure is positioned to overlie a plurality of microcells forming a planar array....
US-4,384,336 Method and apparatus for lightness imaging
This invention provides mechanisms that detect the large dynamic range of radiant intensities in the natural environment, that use novel strategies to calculate...
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