Abstract: An electronic still camera comprises solid-state image pickup elements arranged such that a pixel pitch is P (mm); an optical low-pass filter; an image pickup lens for focusing the image light through the optical low-pass filter onto the solid-state image pickup elements, the image pickup lens having resolving power X (lines/mm) at an optical axis when the image light is focused on the solid-state image pickup elements; wherein the following condition is satisfied:1/F.lambda.>X>1/Pwherein F represents F-number and .lambda. is 550.times.10.sup.-6 (mm).

Abstract: In an apparatus for defoaming liquid with ultrasonic wave in order to eliminate foam or bubble from the liquid, provided with an ultrasonic wave liquid tank, a defoaming tank, and an ultrasonic oscillator for irradiating ultrasonic wave through the ultrasonic wave transmitting liquid to the defoaming tank; at least a part of the defoaming tank is immersed in the ultrasonic wave transmitting liquid in the ultrasonic wave liquid tank, and a degree of unsaturation of dissolved air in the ultrasonic wave transmitting liquid under defoaming operation is not lower than 10%.

Abstract: A method for preparing a silver halide emulsion is disclosed, comprising introducing a silver salt solution and a halide solution through separate introduction tubes, mixing the silver salt and halide solutions to react a silver salt and a halide to form silver halide grains and discharging a reaction mixture solution through a discharge tube by the use of a mixing apparatus in which the introduction tubes and the discharge conduit are linked together so that all center axes of the introduction and discharge tubes intersect at a single point, wherein the silver salt solution and the halide solution are independently introduced at a linear velocity of not less than 4.0 m/sec and a Reynolds number of not less than 3,000.

Abstract: Disclosed is a developer for developing an electrostatic latent image, comprising:a carrier prepared by coating a magnetic particle with a resin by a surface polymerization coating method, the carrier having a sphericity .alpha. of 1.0 to 24.0, and a toner particle.

Abstract: An information recording material having thereon an image carrier layer composed of a hydrophilic polymer and a protective covering layer. The protective covering layer contains an aqueous polyurethane resin or an aqueous polyacryl resin. An information recording material which is excellent in terms of water resistance, anti-scratch property, glossiness, image storage stability and resistance to fingerprints is obtained.

Abstract: In a color image forming apparatus provided with a toner image forming device for forming a color toner image on a transfer sheet; and a pair of cylindrical fixing rollers for nipping the transfer sheet bearing the color toner image formed by the toner image forming device therebetween and for fixing the color toner image on the transfer sheet; at least one of the pair of cylindrical fixing rollers including a heat ray irradiating device, a cylindrical light transmitting base member at an inside of which the heat ray irradiating device is provided, an elastic layer provided on the cylindrical light transmitting base member, and a heat ray absorbing layer provided on the cylindrical light transmitting base member and for absorbing and substantially shutting the heat ray passing the cylindrical light transmitting base member.

Abstract: A camera for photographing by exposing a silver halide film, includes: a silver halide photographing device having a lens and a shutter wherein a photographing is conducted by exposing the silver halide film through the lens and the shutter; and an electronic viewfinder having a solid-state image sensor and a direct-vision type image displaying section, for displaying an image picked up by the image sensor on the direct-vision type image displaying section. The image displaying section of the electronic viewfinder is disposed on a rear side of a main body of the camera.

Abstract: A silver halide emulsion is disclosed, comprising a dispersing medium and silver halide grains, wherein at least 50% by number of the silver halide grains is accounted for by tabular silver halide grains containing silver iodide, the tabular grains each meeting the following requirement:I.sub.1 >I.sub.2wherein I.sub.1 is a silver iodide content of an outermost layer in the major face region and I.sub.2 is a silver iodide content of an outermost layer in the side-face region.

Abstract: A silver halide emulsion is disclosed, comprising a dispersing medium and silver halide grains having a variation coefficient of grain size distribution of not more than 20%, at least 50% of total grain projected area of the emulsion being accounted for by tabular grains an aspect ratio of at least 5, the tabular grains each having a surface region having an iodide content more than an average iodide content of the grains, the tabular grains having dislocation lines in a central region and a peripheral region of the major faces, the peripheral region having a silver chalcogenide nucleus-containing phase, the central region having silver nucleus-containing phase, and the peripheral region having at least 10 dislocation lines per grain.

Abstract: A strobe circuit for use in a lens-fitted film unit is composed of a metallic thin plate punched in a circuit pattern; and insulating plate materials covering both obverse and reverse surfaces of the metallinc thin plate; wherein a part of the metallic thin plate is used as a component of the strobe circuit.

Abstract: An emulsified dispersion comprising at least a photographically useful hydrophobic substance and at least a high boiling solvent, further said emulsified dispersion substantially not comprising an auxiliary organic solvent, wherein a solubility parameter of said photographically useful hydrophobic substance at a temperature of 25.degree. C., and a solubility parameter of said high boiling solvent at a temperature of 25.degree. C. satisfies the relationship represented by the following Formula (1), and said photographically useful hydrophobic substance is dissolved in said high boiling solvent, ##EQU1## AiSP: a solubility parameter of a photographically useful hydrophobic substance, Ai, at a temperature of 25.degree. C.HBSiSP: a solubility parameter of a high boiling solvent, HBSi, at a temperature of 25.degree. C..phi.Ai: a proportion based on the volume fraction of a photographically useful hydrophobic substance, Ai, in an oil phase at a temperature of 25.degree. C.

Abstract: An apparatus for accommodating a photographic document comprises a web member; a first roller to which one end of the web member is fixed; and a driving force transmitting means for rotating the first roller to wind up the web member thereon so that the photographic document is wound around the first roller together with the web member.

Abstract: A protective film of a polarizing plate is disclosed in which the protective film comprising a support, and provided on one side of the support, an anti-static layer and a hardened layer in that order, the hardened layer being obtained by hardening a layer containing an ultraviolet ray hardenable resin composition with ultraviolet irradiation, wherein the antistatic layer contains a hydrophobic binder and a compound having a chemical structure represented by formula (I), (II), (III), (IV), (V), (1), (2) or (3).

Abstract: A recording sheet for ink-jet recording is disclosed which comprises a support, and provided thereon, an ink receiving layer, wherein the ink receiving layer contains a water soluble polymer, a polymer latex and gelatin.

Abstract: A cable reel includes a sound-absorbing material which can effectively attenuate both sliding noise and vibration noise and can be produced inexpensively. The cable reel comprises a stationary member assembly and a movable member assembly rotatably mounted on the stationary member assembly. The stationary and movable member assemblies define a cable containing chamber having an annular configuration and upper and lower bearing surfaces. The cable containing chamber accommodates a flat cable in a coiled manner between the upper and lower bearing surfaces. Opposite ends of the flat cable are led out from the stationary and movable member assemblies through electrical means. The sound-absorbing material is made of a foam material and includes at least three straps. The straps extend radially and are equally spaced apart from each other in a circumferential direction on at least the lower bearing surface of the cable containing chamber so that the flat cable slides on the straps of the sound-absorbing material.

Abstract: A silver halide color photographic light-sensitive material is disclosed. The light-sensitive material comprises a transparent support having on one side thereof a cyan dye-forming coupler-containing red-sensitive silver halide emulsion layer, a magenta dye-forming coupler-containing green-sensitive silver halide emulsion layer, a yellow dye-forming coupler-containing blue-sensitive silver halide emulsion layer, a non-light-sensitive hydrophilic colloid layer and an invisible light-sensitive silver halide emulsion layer containing a dye forming coupler, a colored coupler or a DIR compound.

Abstract: An image-forming material having an image-forming layer on a support a liquid comprising colorant particles and a binder and a protective layer on a support in this order is disclosed. The Vickers hardness H of the whole on an image forming side is from 50 to 500. An exposure is performed using a light having high intensity energy and an exposed area of said image-forming layer is then removed to form an image. The abrasion resistance of the image forming material is improved without deteriorating sensitivity and resolution.

Abstract: A one-time use camera having a strobe unit and performing stroboscopic photographing by causing a xenon discharge tube to emit light. The camera includes a film roll chamber for accommodating a photographic film and the strobe unit. The strobe unit further includes a pair of strobe circuit base boards, arranged on both sides of a front surface of the film roll chamber of the one-time use camera, for driving the xenon discharge tube and a connecting member for electrically connecting the strobe circuit base boards with each other.

Abstract: In a heat exchanger for exchanging heat of fluids, the heat exchanger is provided with a heat exchanging section having a shape bent alternately consecutively so as to form laminate space and is constructed such that a first flow passage is formed on a space contacting a first surface of the heat exchanging section among the laminate space; and a second flow passage is formed on a space contacting a second surface of the heat exchanging section among the laminate space, wherein a first fluid flows on the first flow passage and a second fluid flows on the second flow passage.

Abstract: A flexible flat belt made up of a plurality of covered wires abutting each other in side-by-side relationship. Imaginary lines on the peripheries of the covered wires which are parallel to and remote from the axes of the wires determine at least one plane. The adjacent wires form troughs parallel to and spaced apart from the axes and adhesive is applied to the troughs between adjacent wires. It is preferred that a first adhesive, which sets instantaneously, be applied at spaced apart intervals between adjacent wires. Since this adhesive is spaced apart, flexibility is not impaired. This is used in conjunction with the second adhesive which is non-setting and is supplied substantially throughout the length of adjacent wires. Due to its character, it does not interfere with the flexibility of the flat cable.