Abstract: In a fingerprint matching processor which has an electrostatic capacity semiconductor sensor 14 for detecting fingerprint information based on electrostatic capacities between a plurality of detection electrodes 21 arranged on a semiconductor substrate 24 at a predetermined interval in a two dimensional manner and a target object, and which executes a fingerprint matching process for the detected fingerprint information, a water repellent film 30 is formed on a protective film 26, the protective film 26 protecting ground electrodes 22 that are disposed between the detection electrodes 21 and configured to ground the target object and the detection electrodes 21, and serves as a surface of the semiconductor sensor 14 for placement of the target object.

Abstract: In a fingerprint matching processor which has an electrostatic capacity semiconductor sensor 14 for detecting fingerprint information based on electrostatic capacities between a plurality of detection electrodes 21 arranged on a semiconductor substrate 24 at a predetermined interval in a two dimensional manner and a target object, and which executes a fingerprint matching process for the detected fingerprint information, a water repellent film 30 is formed on a protective film 26, the protective film 26 protecting ground electrodes 22 that are disposed between the detection electrodes 21 and configured to ground the target object and the detection electrodes 21, and serves as a surface of the semiconductor sensor 14 for placement of the target object.

Abstract: A filter for a display device capable of preventing a reduction of the contrast of a display screen which occurs when the mechanical strength of the CRT is strengthened and the panel glass is made thinner or when an antireflection film is formed, including a filter substrate and an adhesive layer formed on an adhering surface of the filter substrate to the display panel and having a function of adjusting a transmittance of visible light to a predetermined value and a display device using the same.

Abstract: A display device antireflection filter 100 formed on a glass base material is comprised of an antireflection layer 102 of at least one layer containing SiO2 and a material layer 103 made of composition produced by adding compound whose interaction with SiO2 is small to compound having alkoxysilane group at terminal and which has perfluoropolyether group. This device exhibits improved wear and abrasion resistance.

Abstract: A display device antireflection filter 100 formed on a glass base material is comprised of an antireflection layer 102 of at least one layer containing SiO2 and a material layer 103 made of composition produced by adding compound whose interaction with SiO2 is small to compound having alkoxysilane group at terminal and which has perfluoropolyether group. This device exhibits improved wear and abrasion resistance.

Abstract: An explosion-proof film being good in visibility, scratch-resistance, and workability, and a cathode-ray tube using the film. The explosion-proof film includes a transparent plastic film as a base material; and a reflection preventive film having two or more layers, which is formed on one surface of the plastic film; wherein, of the two or more layers of the reflection preventive film, at least one has a light absorption function, and at least another has a conductive function. The explosion-proof film is stuck on a surface of a panel glass constituting a display screen of a cathode-ray tube, to thereby give an explosion-proof function to the cathode-ray tube, to achieve lightweightness of the cathode-ray tub, and to obtain the optimum visual contrast. The explosion-proof film may be formed of three or more layers.

Abstract: The present invention is a filter for a display device having a substrate 1, an outermost layer inorganic film provided on the substrate 1 through or not through one or more other films and a surface modified film covering the surface of the outermost layer inorganic film and having a polar term component .gamma..sup.p of the surface energy of not more than 2.0 erg/cm.sup.2. The present invention provides a filter for a display device having an antireflection property superior in stain resistance, scratch resistance, processing resistance, etc. and suitable even when used as a front panel of a CRT or other display device.

Abstract: A composition for forming an antifouling film or an optical component having such an antifouling film, for example, an anti-reflection filter, contains an alkoxysilane compound having a perfluoropolyether group indicated by the following general formula (1):R.sub.f (COR.sub.1 --R.sub.2 --Si(OR.sub.3).sub.3 }.sub.j (1)where, in the formula, R.sub.f indicates a perfluoropolyether group, R.sub.1 indicates a bivalent atom or group, R.sub.2 indicates an alkylene group, R.sub.3 indicates an alkyl group, and j is 1 or 2.

Abstract: A anti-reflection member provided with an antistatic function and an electromagnetic radiation shielding function and having a reflection preventing optical thin film excellent in adhesion with the hard coat layer.The anti-reflection member comprises a laminate composed of substrate, hard coat layer, and reflection preventing optical thin film having at least two layers, the first layer of the reflection preventing optical thin film provided in contact with the hard coat layer comprises a transparent conductive oxide film (for example, SnO.sub.2, ZnO, In.sub.2 O.sub.3, or ITO) formed by reactive physical vapor phase deposition, and the second layer of the reflection preventing optical thin film consists of a material (for example, SiO.sub.2 or MgF.sub.2) having a refractive index smaller than that of the first layer.

Abstract: An optical waveguide device for optically coupling a semiconductor laser to an optical waveguide. An optical waveguide substrate having the optical waveguide therein is mounted on a smooth surface of a heat sink for the semiconductor laser on which surface the semiconductor laser is mounted so that a light entry end surface of the optical waveguide abuts against a light exit end surface of the semiconductor laser and that a surface of the optical waveguide substrate on the side where the optical waveguide is formed abuts against the smooth surface of the heat sink. Accordingly, accurate alignment between a light exit end of the semiconductor laser and a light entry end of the optical waveguide can be effected by a simple construction.