Abstract: The process for the production of a laminated electronic part containing a major component as represented by general formula:X(Mg.sub.a Zn.sub.(1-a)).sub.x SiO.sub.x+2 --YAl.sub.2 O.sub.3 --ZSrTiO.sub.3(where symbol a is defined by: 0.1.ltoreq.a.ltoreq.0.8; and symbol x is defined by: .ltoreq.x.ltoreq.1.5);and an additive component comprised of a compound containing one or more elements selected from Nb, Ta and W;wherein a mole percent ratio of magnesium zinc silicate, (Mg.sub.a Zn.sub.(1-a)).sub.x SiO.sub.x+2, (X), to alumina, Al.sub.2 O.sub.3, (Y), and strontium titanate, SrTiO.sub.3, (Z), each of which constitutes said major component, is set to be located in a region enclosed by a polygon having apexes at points A, B, C and D, as defined below, in a three-component composition map:______________________________________ A (94.9, 0.1, 5.0) B (85.0, 10.0, 5.0) C (65.0, 10.0, 25.0) D (65.0, 0.1, 34.9); ______________________________________and the additive component is contained at a rate of 0.01 to 0.

Abstract: Gravity gradient measurements taken by an accelerometer type gradiometer are optimized by tilting the measuring plane of the instrument by a selected angle above and below the horizontal to obtain data that can be differenced or otherwise processed to remove instrument bias and by taking data at first and then at a second orthogonal azimuth heading to obtain absolute non-relative gradient measurements.

Abstract: A method and apparatus for growing and manufacturing a single crystal according to a so-called Czochralski (CZ) method. A seed crystal 12 is connected to a tip end of a wire 41a as a hanging member 41 to pull and form a single crystal part 15, arm-shaped members 44a of a lifting jig 44 are engaged in a recess 16 of a corrugated portion 14 formed on the single crystal part 15 during the pulling operation, the pulling speeds of both of the arm-shaped members 44a and wire 41a are synchronously controlled to provide smooth transfer between the arm-shaped members 44a and wire 41a, whereby the single crystal part 15 is pulled always at a constant pulling speed. In particular, a heavy-weight single crystal can be safely pulled and formed without any dislocation therein while minimizing an impact force applied to the crystal.

Abstract: In a three-sheet image readout lens, predetermined expressions are satisfied, so as to yield a bright lens system which can favorably correct each kind of aberration, while attaining a smaller size and a lighter weight. The lens system is constituted by, successively from the object side, three positive, negative, and positive lenses L.sub.1 to L.sub.3, while a stop i is disposed downstream the third lens L.sub.3, satisfying the following conditional expressions (1) to (6):(1) 0.85<f.sub.1 /f<0.93(2) -0.90<f.sub.2 /f.sub.3 <-0.84(3) 0.025<d.sub.2 /f<0.043(4) 0.09<d.sub.5 /f<0.16(5) -2.5<r.sub.3 /r.sub.4 <-2.1(6) .vertline.d.sub.6 .vertline./f.ltoreq.0.03.

Abstract: A diffraction grating having a wavelength selectivity is disposed at a peripheral region of a filter, and only a wavelength of light whose luminous flux diameter is to be narrowed is diffracted sideways at the diffraction grating, whereby the luminous flux diameter of irradiation light is changed by a simple configuration without complicating an electric control system or restricting the direction of vibration of the irradiation light. On a glass substrate 10, a first region 11 having no diffraction grating 12A and a second region 12 having diffraction gratings 12A with a rectangular cross section are disposed. The second region 12 comprises linearly arranged diffraction gratings 12A each having a rectangular cross section. The thickness (height) of each diffraction grating 12A is set to such a value that the ratio of .+-.

Abstract: In an optical scanning apparatus for causing a luminous flux from a rotary polygon mirror 4 to form an image on a surface to be scanned 6, a concave lens 5a functions not only as one constituent of an f .theta. lens with respect to the luminous flux scanned by the rotary polygon mirror 4 but also as a cylindrical lens for forming a linear image in the vicinity of a deflecting and reflecting surface of the rotary polygon mirror 4 with respect to a luminous flux from a laser light source 1. The luminous flux directed from the light source 1 to the rotary polygon mirror 4 is passed through the concave lens 5a such as to intersect the optical axis of the f .theta. lens.

Abstract: A diffraction grating with a wavelength selectivity having one sectional side formed like a step is disposed at a marginal region of a filter, and only a wavelength of light whose luminous flux diameter is to be narrowed is diffracted sideways at the diffraction grating, whereby the luminous flux diameter of irradiation light is changed by a simple configuration without complicating an electric control system or restricting the direction of vibration of the irradiation light, while reducing noise. Disposed on a glass substrate 10 are a first region 11 having no diffraction grating 12A, and a second region 12 having diffraction gratings 12A constituted by long protrusions arranged in parallel at a predetermined pitch, each protrusion being continuous in one direction and having one sectional side formed like a step.

Abstract: A warm water supply spot is located near a top end of an egg conveyance device and the degree of slope for the device is increased in the region from the water supply spot to the top end, so that the water dammed by the egg moving up the egg conveyance device does not overflow at the top end. The water is used efficiently without waste.

Abstract: The present invention aims to provide a method of producing a high-quality multi-filament spread sheet by spreading the filaments in such a manner that they are orderly disposed in parallel to each other without the quality deterioration and an apparatus used in the same as well as a multi-filament spread sheet produced in the same. The method and apparatus embodied in the present invention are intended to spread the filaments widthwise by subjecting a multi-filament oversupplied by a certain amount under a feeding control mechanism from a yarn supply section to a yarn winding section to air blowing crosswise with the multi-filament so as to transform the filaments into a multi-filament spread sheet. With this method and apparatus, it becomes possible to obtain various types of multi-filament spread sheets.

Abstract: In an illumination optical system whose optical axis is inclined with respect to the normal of a liquid crystal display panel 23, the form of each lens element constituting each of flyeyes (integrator plates) 11A, 11B of an integrator section 11 is adjusted in a direction along which extends a line of intersection formed between each of the flyeyes 11A, 11B and a plane including the optical axis of the integrator section 11 and the normal of the liquid crystal display panel 23, such that, when a luminous flux is obliquely incident on the liquid crystal display panel 23, its illumination area on the liquid crystal display panel 23 has a size larger than the effective area of the liquid crystal display panel 23 by a slight margin, whereby illumination efficiency is prevented from decreasing on the liquid crystal display panel 23.

Abstract: Here is disclosed a lens holding mechanism of rimless spectacles with a simple structure, which nonetheless enables the respective lenses to be securely clamped. A first holding aperture and a second holding aperture are provided in the vicinity of the circumferential fringe sides of the respective lenses and a joint member provided with a first thrusting projection and a second thrusting projection is formed extensively from a contra-lens portion of an endpiece or a bridge. The first projection is inserted into the first aperture while the second projection is inserted into the second aperture, and at least the first projection and the first holding aperture are tightly held onto each other by means of a clamping sleeve or cap made of basically, synthetic resin. In spite of such an extremely simple structure, the reliable lens clamping is assured.

Abstract: A glass unit such as a binocular or monocular in which an object to be observed is viewed under magnification is made to display a map image, whereby the observer's own position can be specified on the map image without an atlas being opened. Based on a self-position data input from a GPS unit (21), a CPU (31) transmits map image information near its own position from a topographic map database (23) to a CG buffer (39) by way of a memory (25). On the other hand, based on the self-position data, a mark or character indicative of its position on the map image is generated by a mark character generating unit (35) so as to be superimposed onto the map image from the CG buffer (39), whereby a composite image thus formed is displayed by an LCD within a housing (10) so as to be viewed within the visual field of the glass unit.

Abstract: A dielectric ceramic composition is comprised of a crystal structure phase of a tungsten bronze form, one titanate-barium phase or more titanate-barium phases selected from Ba.sub.2 Ti.sub.9 O.sub.20, BaTi.sub.2 O.sub.5, BaTi.sub.4 O.sub.9 and Ba.sub.4 Ti.sub.13 O.sub.30, and a fine crystal phase comprising an oxide of each of at least B, Ag and Mn, in which the crystal structure phase of the tungsten bronze form is formed with a limited amount of a compound oxide of Ba, Nd and Ti as a basic component and contains a limited amount of each of an oxide of at least Bi, Pb, Zn and Si. The dielectric ceramic composition can be fired at a temperature of 920.degree. C. or lower and sintered forming into a ceramic electronic part which has remarkably high dielectric characteristics, such as the dielectric constant of 60 or higher, the Q factor of 1,000 or higher, and the temperature coefficient .tau..epsilon.r of the relative dielectric constant .epsilon.r of .+-.60 ppm/.degree. C. or smaller.