摘要:
Provided is an ND filter including an alternating layer which is composed of two films being alternately stacked and formed on a transparent substrate, the two films having different refractive indexes, wherein the alternating layer has a substrate-side reflected light attenuating multi-layered film and a transmittance adjusting multi-layered film formed on the transparent substrate in the stated order from the transparent substrate side, and the light absorption amount of the substrate-side reflected light attenuating multi-layered film is set to be 20% or more and 30% or less. Thus, an ND filter having satisfactory front surface reflection characteristics and rear surface reflection characteristics can be stably obtained while the transmittance of 4% or more and 11% or less is maintained with respect to the entire visible region (400 nm or more and 700 nm or less).
摘要:
To provide useful general-purpose pelletized activated carbon and an industrially advantageous production method for pelletized activated carbon. The above-mentioned object is achieved by pelletized activated carbon that is pelletized by using, as binders, at least one kind of binder selected from a group (A group) consisting of acrylic emulsions and acryl-styrene-based emulsions and at least one kind of binder selected from a group (B group) consisting of cellulose ether and polyvinyl alcohol-based polymers, and a production method for the same.
摘要:
A magnetically sensitive element is integrated with an operation controlling element by film-forming process or bonding of film-shaped bodies. The operation controlling element is formed as a single layer or multilayers and contains a permanent magnet or a magnetic circuit forming member. A pickup coil may also be integrated thereto. The magnetically sensitive element is a magnetic element in which a giant Barkhausen jump phenomenon appears.
摘要:
A polishing compound containing cocoon-shaped silica particles and crystal silica particles, and water-soluble polymers including; at least one type selected from the groups including ammonium nitrate and ammonium acetate, and at least one type selected from methylcellulose, carboxymethylcellulose, hydroxyethylcellulose, and the group including carboxymethylcellulose.
摘要:
A process for producing ultra-fine ceramic particles with the particle size of less than 1000 .ANG., which comprises the steps of forming powdered dust cloud of metal powder such as Si constituting a portion of aimed ceramic particles in a reaction gas containing the other portion of said aimed ceramic particles, igniting said powdered dust cloud to cause explosive burning and synthesizing said aimed ceramic particles and gathering said resulting ceramic particles. By the process, ceramic particles such as Al.sub.2 O.sub.3, MgO, SiO.sub.2, TiO.sub.2, TiN having particle size of 10-100 nm can be produced.