Abstract: A top fitted with a basin having good water drainage which is constructed by fixing the basin to the top made by laminating a decorative board on the top surface of a wood derived material, e.g. plywood, particle board etc. as a core material, so that a flange part of the basin is situated beneath the rear surface of the decorative board, and bonding and reinforcing with a synthetic resin, and a process for their production.By the present invention, the basin can be firmly fixed without any spaces, and therefore remarkably increases durability of kitchen fixtures.

Abstract: There is inserted between a light source and an input of an optical fiber a mode filter which changes the phase of light to be propagated continuously or discontinuously so as to convert guided modes of lower azimuthal number into those of higher numbers in a light transmitting system which employs a graded index optical fiber with a valley at the core-cladding boundary. This reduces the mode-delay differences for all modes including those which are close to cut off so that an optical communication system having a very wide bandwidth is obtained.