Abstract: In a conventional decorative component, a conductive material is formed on the entire surface of an insulation part so that the decoration part looks in metallic color. However, an electric current flows through the inside of the conductive material, and hence electromagnetic waves applied to the decoration part suffers a loss. This poses a problem that sufficient antenna characteristics cannot be obtained. On the member surface, a semiconductor layer or a semi-metal layer with a film thickness of 5 nm or more, and a mean transmittance of 65% or less and a mean reflectance of 20% or more at 400 nm to 800 nm is formed. This can implement a decorative component exhibiting a sufficient metallic luster without blocking the electromagnetic waves.

Abstract: An optical processing apparatus for processing optically a workpiece (7) by using a light beam (B). The apparatus is capable of automatically adjusting a imaging magnification to a predetermined value and at the same time maintaining constant a imaging magnification regardless of exchange of masks (3; 100) and workpieces (7) and for ensuring an extended use life of a mask with satisfactory mask function.

Abstract: An optical processing apparatus utilizing multiple reflections of a light beam between a mask and a reflector has improved uniformity in the distribution of the light beam over a surface of the mask. In one form, the reflector is disposed in a face-to-face relation with respect to the mask with an angle of inclination relative thereto. In another form, the reflector has a flat or curved taper surface for decreasing an angle of reflection of the light beam at the mask surface at an initial stage, and a flat surface disposed in parallel with the mask surface. In a further form, the reflector is curved in a direction of transmission of the light beam. In a yet further form, an angle of incidence of the light beam is properly adjusted such that a portion of the light beam, which is first reflected from the mask and escapes outwardly from the reflector, is minimized.

Abstract: A laser machining apparatus comprises a mask, a reflecting mirror and an imaging optical system. The laser light reflected by the mask and also by the reflecting mirror passes through the mask and images on the work for machining the work. The laser machining apparatus comprises means for causing said mask to move in parallel with said work for machining the work. This laser machining apparatus is able to machine a work having a large surface using small apertured mask. Another type of laser machining apparatus comprises a mask and a platform and an imaging optical system. The mask and the work are puts in the same plane of the platform and driven so that the image of the mask is mapped on the work via the imaging optical system. The laser machining apparatus is able to machine a large area at low price and high accuracy.

Abstract: An optical machining apparatus for irradiating light from a light source onto a source to be machined to form a grooves in the surface. The apparatus uses a mask disposed in the path of light from the light source. The mask includes reflective parts for reflecting the light from the light source. The reflective parts are on a first surface of the mask. The mask also includes a reflection member for returning the light reflected at the reflective parts of the mask toward the mask.

Abstract: A gas detector for detecting the decomposed SF.sub.6 gas produced by discharge in gas-insulated equipment. The gas detector operates as a cell generating voltage in proportion to the amount of the decomposed SF.sub.6 gas wherein the voltage is generated between the detection electrode including Ag, reacting upon contact by the decomposed gas and the opposing electrode including Ag also, both electrodes sandwiching the ionic conductive solid electrolyte layer including Ag ion therebetween.