Abstract: An optical component (10), formed with a plurality of optical fibers arranged parallel with each other, has an incident surface (10a) obliquely cut with respect to the fiber axis, and an output surface (10b) perpendicularly cut with respect to the fiber axis. The core (12) of each optical fiber with a square cross-sectional shape is divided equally into two areas (12a) and (12b) via a flat plate-like clad part (14) lying on the central axis of the core (12). Moreover, the optical fibers are arranged such that the dividing directions (t direction in FIG. 1B) of the divided cores (12) are irregular per each optical fiber. Furthermore, the periphery of each core (12) is covered with a clad (16).

Abstract: As shown in FIG. 1, an optical device 10 comprises an input optical member 11, in which a plurality of optical fibers 14 are arranged parallel to each other and integrally formed, having an entrance surface 11a and an exit surface 11b which intersect an optical axis at an angle of 15° and at an angle of 30°, respectively; and an output optical member 12, in which a plurality of optical fibers are c:l arranged parallel to each other and integrally formed, having an entrance surface 12a and an exit surface 12b which intersect an optical axis at an angle of 7.5° and at an angle of 90°, respectively. Here, the exit surface 11b of the input optical member 11 and the entrance surface 12a of the output optical member 12 are in contact with each other, whereas the angle formed between the optical axis of the input optical member 11 and the optical axis of the output optical member 12 is an angle of 22.5° which is the difference between 30° and 7.5° mentioned above.

Abstract: An optical device 10 comprises an input optical member 11, in which a plurality of optical fibers 14 are arranged parallel to each other and integrally formed, having an entrance surface 11a and an exit surface 11b which intersect an optical axis at respective angles of 90° and 20°; and an output optical member 12, in which a plurality of optical fibers are arranged parallel to each other and integrally formed, having an entrance surface 12a intersecting an optical axis at an angle of 55° and an exit surface 12b parallel to the entrance surface 12a. Here, the exit surface 11b of the input optical member 11 and the entrance surface 12a of the output optical member 12 are in contact with each other, whereas the angle formed between the optical axis of the input optical member 11 and the optical axis of the output optical member 12 is an angle of 35° which is the difference between 55° and 20° mentioned above.

Abstract: The fiberoptic block in accordance with the present invention has an input end face constituted by a combination of a plurality of surfaces each of which is inclined at a slant angle .alpha. by which disturbing light from within the air can be eliminated, whereby an irregularity image with a high contrast can be emitted as usual. Also, it has an output end face perpendicular to the axis of each unit fiber. Accordingly, when the output end face is butted against and secured to an input face of a photodetector, the irregularity image is made incident on the input face of the photodetector so as to be substantially perpendicular thereto, thus allowing a bright irregularity image to be attained. Further, since this fiberoptic block has a form extending from the output end face in a direction perpendicular thereto, it can be attached to the photodetector relatively easily with a high precision.

Abstract: The fiber optic device in accordance with the present invention has a structure in which two fiber optic members are connected together, end faces thereof opposing each other. The input-side fiber optic member comprises cores extending in a predetermined direction and a light absorber surrounding the cores. The output-side fiber optic member comprises cores extending in a predetermined direction, and a cladding surrounding the cores. The input end face of the input-side member is inclined with respect to core axes therein. In this device, the angle of inclination of the input end face of the input-side member or the angle formed between the output end face of the output-side member and each core axis in the output-side member can be set to a value relatively near to 90.degree.. Accordingly, this device can be attached to a photodetector with relative ease. Also, a light receiving member formed by this attachment is relatively compact.

Abstract: A fiber optics device of this invention includes first and second assemblies. The first assembly is obtained by integrating a plurality of optical fibers by bundling, and has first and second end faces formed obliquely to the optical axis of the optical fibers contained in it. The second end face has small recesses and projections to scatter light emerging from it. The second assembly is obtained by integrating a plurality of optical fibers by bundling, and has first and second end faces substantially intersecting perpendicularly to the optical axis of the optical fibers contained in it. The first end face of the second assembly is bonded to the second end face of the first assembly. As a result, an optical loss occurring at the bonding portion between the assemblies can be decreased.

Abstract: A fiber optics device of this invention includes first and second optical members. The first optical member is obtained by integrating a plurality of optical fibers of the first type by bundling, and has first and second end faces formed obliquely to the optical axis of the optical fibers of the first type and parallel to each other. The second optical member is obtained by integrating a plurality of optical fibers of the second type by bundling, and has first and second end faces formed obliquely to the optical axis of the optical fibers of the second type and parallel to each other. The optical fibers of the second type have a larger numerical aperture than that of the optical fibers of the first type. The first end face of the second optical member is bonded to the second end face of the first optical member.

Abstract: The object of the present invention is to provide an absorber glass for FOP having a broad absorption band which extends from ultraviolet region through visible region to near infrared region. The absorber glass of the present invention contains 18 to 40% by weight of SiO.sub.2 and not smaller than 20% by weight of FeO and Fe.sub.2 O.sub.3 in total.

Abstract: A tapered FOB (20) obtained by forming optical absorbers on the outer surfaces of fibers and bundling these fibers is joined to a slant FOB (10) obtained by bundling fibers, and a CCD (60) is arranged at the output end face of the tapered FOB (20). The slant angle (.beta..sub.0) of a detection surface (11) of the slant FOB (10) on which a fingertip is to be placed is set to an angle at which background light incident from air on the slant FOB (10) is not reflected as total internal reflection at the interface between the core and cladding of the slant FOB (10). The slant angle (.beta..sub.1) of the tapered FOB (20) is set such that background light reaching the tapered FOB (20) becomes incident at the interface between the core and the cladding at an angle smaller than the critical angle at which total internal reflection occurs. Unwanted background light and illumination light are eliminated, and the S/N ratio of a fingerprint image to be detected can be increased.

Abstract: The object of the present invention is to provide an absorber glass for FOP having a broad absorption band which extends from ultraviolet region through visible region to near infrared region. The absorber glass of the present invention contains FeO, 18 to 40% by weight of SiO.sub.2 and not less than 20% by weight of FeO and Fe.sub.2 O.sub.3 in total.

Abstract: When a fiber optical plate is applied to a touch sensor, a flat touch surface can be formed, and the overall device using the fiber optical plate can be formed into a low-profile structure. The numerical aperture of the input end face of one slant FOP is set to be larger than that of the output end face of another slant FOP to cause light incident from the latter slant FOP to be efficiently incident on the former slant FOP. The detection surface and the output end face are located to be orthogonal to each other. With this structure, the detection surface can be formed evenly with the touch surface. In addition, detection elements such as a CCD can be disposed at the output end face along the lower surface of the touch surface.

Abstract: The present invention provides a fiber optical plate comprising (i) a first unit formed by a plurality of first optical fibers which are bundled together and include a core portion and a clad portion and (ii) a second unit optically coupled to the first unit and formed by a plurality of second optical fibers which are bundled together and include a core portion, a clad portion, and an optical absorber made of a material for absorbing the light leaking from the clad portion.

Abstract: An apparatus comprises a fiber optic device having a plurality of cores buried in a cladding, a first luminescent screen fixed to an input face of said fiber optic device, and a first CCD image sensor fixed to an output face of the fiber optic device. The CCD image sensor comprises a package, a CCD chip fixed in the package, lead pins penetrating said package, and bonding wires connecting said lead pins to said CCD chip. The CCD chip comprises an image pickup region for converting a ray incident thereto into an electric signal, and bonding pads in contact with said bonding wires and wherein said output face is in contact with said image pickup region and said output face is not in contact with said bonding pads.

Abstract: A photo electric conversion tube in which a translucent photocathode surface is provided inside of an incident light window. The incident light window is made of glass plate and an optical fiber plate bonded to at least part of the glass plate or just the optical fiber plate on the photocathode surface. The optical fiber plate contains fibers which are inclined at an angle to the photocathode surface.

Abstract: Disclosed are the processes of how to fabricate the microchannel plate for use in electron image intensifying by using a number of glass pipes, each consisting of glass material containing oxides of alkaline earth metals, i.e., magnesium oxide (MgO) or a mixture of magnesium oxide (MgO) and calcium oxide (CaO).