摘要:
A recording medium which has, formed on a substrate, a recording layer that contains spherical grains having a substantially uniform grain size and including inorganic grains. Preferably, an undercoat layer having no substantial information recording ability is formed between the substrate and the recording layer.
摘要:
This invention provides a cylinder type nonaqueous secondary battery which comprises a positive electrode active material comprising a lithium-containing transition metal oxide, a composite oxide or composite chalcogen negative electrode material capable of intercalating and deintercalating lithium and a nonaqueous electrolyte containing a lithium metal salt, wherein high discharging capacity and excellent charge and discharge cycle characteristics are obtained by mounting a metal foil mainly comprising lithium in advance in a coiled group in which a current collector sheet coated with the positive electrode active material (positive electrode sheet), another current collector sheet coated with the negative electrode material (negative electrode sheet) and a separator are coiled in a spiral form.
摘要:
A nonaqueous secondary battery comprises an anode active material comprising a carbonaceous material, an electrolyte and a cathode active material comprising a lithium-containing transition metal chalcogenide. The carbonaceous material is obtained by burning a polyacrylonitrile fiber and has length of a crystallite in the c-axis direction of 75 to 250 .ANG. and an interval of 002 faces of 3.41 to 3.44 .ANG., the length and the interval being determined from an X-ray diffraction spectrum thereof using a Cu-K.alpha. ray.
摘要:
In a zoom camera disclosed, a memory of an auto-zooming program lines is provided in which a relation between the object distance and the image mangification added with an element of the depth of field is set in a predetermined manner according to each kind of photographing mode, and such a focal length of a focusing lens is computed that the image mangification is set to be a predetermined value based on the object distance and a program line of a photographing mode selected by a user, whereby the focusing lens is driven so as to obtain the focal length. Consequently, auto-zoom photographing at a depth of field and an image magnification suitable for each kind of photographing mode can be achieved. Further, a memory of program lines set according to the vertical and horizontal camera attitudes in photographing is provided, and the image mangification can be changed over according to each camera attitude.
摘要:
The present invention relates to a device for measuring object distance or an in-focus position used for a camera in which the object distance of focus adjusting condition are measured in a plurality of distance measuring areas in the photographing scene. The device is so constructed as to judge a main object from weight data in correspondence not only with the object distance of each distance measuring area but with the position thereof in the photographing scene. Further, when there is an object nearer than a predetermined distance, the main object is judged from whether the object has a size larger than a predetermined size in the photographing scene. Furthermore, it is judged from the difference between the object distances of adjacent distance measuring areas whether the objects are the same object.
摘要:
A mount arrangement for a photographic camera which is capable of automatic diaphragm control and automatic focusing includes electrical contacts for transmission of electrical signals between a camera body and an interchangeable lens unit, and mechanical transmission members for the automatic diaphragm control and the automatic focusing and positioning member and recess on and at inner periphery of mount members of the camera body and the lens unit so as not to interfere with each other during the start and the course of the mounting of the lens unit onto the camera body through a bayonet mount device.
摘要:
A photographic material is described, comprising at least one layer containing at least one of (i) a polymer of a compound represented by formula (I) ##STR1## wherein R.sup.1 represents a hydrogen atom or an alkyl group having from 1 to 6 carbon atoms,L represents a divalent organic linking group,A represents a divalent organic linking group derived from a polymerizable monomer unit,n represents an average degree of polymerization and is a number of at least 2, andY represents a monovalent organic bonding groupand (ii) a copolymer of the compound represented by formula (I) with a copolymerizable ethylenically unsaturated monomer.
摘要:
A silver halide photographic light-sensitive material is described, comprising a hydrophilic organic colloid layer, wherein the hydrophilic organic colloid layer contains at least one compound represented by ##STR1## wherein R.sub.1 represents a substituted or unsubstituted alkyl or aromatic group;R.sub.2 represents a hydrogen atom or ##STR2## wherein L.sub.4 represents a divalent bonding group, and R.sub.5 represents a hydrogen atom or a substituted or unsubstituted alkyl or aromatic group;R.sub.3 and R.sub.4 each represents a hydrogen atom, or a substituted or unsubstituted alkyl group;L.sub.1 represents a divalent bonding group;L.sub.2 and L.sub.3 each represents a single bond or a divalent or trivalent bonding group;n and n' each represents an integer of 1 or 2;A represents a repeating unit resulting from polymerization of an ethylenically unsaturated monomer copolymerizable with monomers constituting the units ##STR3## wherein X.sub.1 and X.sub.2 each represents a hydrogen atom or a cation; x, y, and z are each an average number of units derived from respective monomers; andQ represents a monovalent group.
摘要:
A mount arrangement for a photographic camera which is capable of automatic diaphragm control and automatic focusing includes electrical contacts for transmission of electrical signals between a camera body and an interchangeable lens unit, and mechanical transmission members for the automatic diaphragm control and the automatic focusing and positioning member and recess on and at inner periphery of mount members of the camera body and the lens unit so as not to interfere with each other during the start and the course of the mounting of the lens unit onto the camera body through a bayonet mount device.
摘要:
A silver halide photographic light-sensitive material is disclosed. The photographic material is comprised of a support base, a silver halide emulsion layer and an antistatic layer. The antistatic layer contains a nonionic surface active agent having two polyoxyethylene chains in a molecule represented by the formula (I): ##STR1## wherein R.sub.1 and R.sub.3 each represents a substituted or unsubstituted alkyl group, an aryl group, an alkoxy group, a halogen atom, an acyl group, an amido group, a sulfonamido group, a carbamoyl group or a sulfamoyl group, R.sub.2 and R.sub.4 each represents a hydrogen atom, a substituted or unsubstituted alkyl group, an aryl group, an alkoxy group, a halogen atom, an acyl group, an amido group, a sulfonamido group, a carbamoyl group or a sulfamoyl group, R.sub.5 represents a hydrogen atom, a methyl group or an .alpha.-furyl group, and m and n independently represents an average degree of polymerization of ethylene oxide, which is 2 to 40. By utilizing the compound of general formula (I) it is possible to obtain a photographic material which aids in eliminating screen contamination. The compound has good antistatic properties which do not change with the passage of time. Furthermore, the compound does not have undesirable effects on the photographic properties of the photographic material.