Nippon Sheet Glass Company, Limited

Onda Techno

Nippon Sheet Glass Do., Ltd.

Yasunao Kuroda

Yukihisa Kusuda

Seiji Ohno

Takahisa Arima

Shunsuke Ohtsuka

Hideaki Saitou

Akihiro Koyama

Kenichi Nakama

Shuhei Tanaka

Harunobu Yoshida

Yoshihiro Matsuno

Masahide Wakisaka

Takashi Tagami

Nobuyuki Komaba

Shinya Katayama

Kiyoshi Tone

Seiji Oono

Mitsuya Ozaki

Kenichiro Matsumoto

Jyunji Kurachi

In an optical write head, a rod lens array, a substrate support member for supporting a substrate, and a driver circuit board are fixedly held by a support member. The support member and the substrate support member are formed from metallic material, and a frame of the rod lens array is formed from a glass plate. Further, distance between a light-emitting section of a light-emitting device array and a light-incident end face of the rod lens array is adjusted, by means of rotating eccentric pins. Further, light-emitting device array chips are die-bonded on the substrate bonded at predetermined positions on the substrate support member while the position of the substrate support member is taken as a reference plane.

Optical write head, and method of assembling the same

When a diffraction grating having a grating period of d and a diffraction order of m for an incident light having a wavelength interval &Dgr;&lgr; between i'th and (i&plus;1)'th channels is used, an optical path length between the diffraction grating and the photodetector is represented by L and a mean output angle is represented by &thgr; , a pitch p between the i'th and (i&plus;1)'th photodetectors in the photodetector array satisfies the equation of p &equals;m&Dgr;&lgr; L/d cos &thgr; .

Photodetector array and optical communication monitor module using the same

The cost of a light-emitting element matrix array is reduced by implementing a function equivalent to a light-emitting thyristor by elements different therefrom. A plurality of combinational element are arrayed in one line. The plurality of combinational elements are divided into groups n by n. The bases of transistors included in each group are separately connected to base-selecting lines and the anodes of light-emitting diodes included in each group are commonly connected to one anode terminal every group.

Light-emitting element matrix array

A method for setting the amount of light in an array of light-emitting thyristors, each thyristor having I-L characteristic in which a luminous efficiency is decreased in a lower current field, is provided. According to the method, the amount of light emitted from a light-emitting thyristor is set so that a predetermined exposure energy may be obtained without decreasing a luminous efficiency of a light-emitting thyristor. The density D of a current to be supplied to the light-emitting thyristor to obtain a predetermined exposure energy is selected so as to satisfy the range of 3&times;D <D<100 MA/m , wherein D is a threshold current density for light emission which is defined as a current density corresponding to the value of a current at a point where a tangent drawn at the value of a current corresponding to a current density of 50 MA/m with respect to the curve of the I-L characteristic intersects a current axis.

Method for setting quantity of light of light-emitting element array

A magnetic recording medium includes a substrate, a data region and a CSS region on a surface of the substrate. Information is recorded in the data region, and a magnetic head is held stationary in the CSS region. A thin film texture is fabricated in the data region by sputtering, and a laser texture is fabricated in the CSS region by laser irradiation. The laser texture includes a plurality of first projections. The thin film texture includes a plurality of second projections. The second projections are lower in height than the first projections.

Magnetic record medium having a sputter formed thin film texture with second projections of a height lower than first projections

A flat type fluorescent lamp, obtaining an improvement in efficiency of brightness and being adjustable in an emitted light amount thereof, while maintaining a uniform light emission across the surface thereof, and illuminating with no use of mercury therein, comprising a sealed container being defined between a front glass substrate and a rear glass substrate which are hermetically bonded to each other, so as to enclose a rare gas as discharge gas therein, edge electrodes, having width from 2.5 mm to 10 mm and being provided at both end portions on one surface of the sealed container, and other edge electrodes, having width from 5 mm to 20 mm and being provided at both end portions on the other surface thereof, wherein the edge electrodes on the same side surfaces are connected to each other, a first inverter is connected between the one edge electrode P,and a central electrode P,which is provided in a central portion of the one surface, and a second inverter is connected between the other edge electrode P,and the central electrode P,, wherein the first inverter and the second inverter provide rectangular waveform outputs, being same in frequency but having phases different to each other, thereby illuminating the lamp.

Flat type fluorescent lamp

A glass substrate for a magnetic disk of the present invention is one in which a laser beam is irradiated on a main surface thereby forming a large number of protrusions thereon to form texture thereon, each of said protrusions being formed by a protruded portion having a convex shape, said glass having a composition in which 0.2 to 3 wt % of an oxide of a transition metal is contained and an absorption coefficient with respect to a wavelength of a light at 266 nm being within a range of 0.03 to 2 .mu.m.sup.-1, and by setting the absorption coefficient of the glass with respect to a wavelength of a light at 266 nm within a range of 0.03 to 2 .mu.m.sup.-1 and irradiating a laser beam having a wavelength in a range of ultraviolet rays selectively on the main surface of a glass substrate at predetermined intervals, texture comprising a large number of protrusions formed by protruded portions each having a small diameter and a convex shape is formed.

Glass substrate for magnetic disks

A glass substrate for a magnetic disk of the present invention is one in which a laser beam is irradiated on a magnetic recording surface side thereby forming a large number of protrusions thereon to form texture thereon, each of the protrusions having a convex shape, an optical absorption coefficient of a glass with respect to a wavelength of a laser beam at 266 nm being within a range of 20 to 2000 mm.sup.-1, the glass having a composition by weight of:

A self-scanning, light-emitting device comprises an array of cells or blocks each having a self-scanning transfer element and a light-emitting element. Turn-on state of the transfer element is transferred to the subsequent transfer element in synchronism with clock pulses. Each light-emitting element is connected to the corresponding transfer element so as to emit light upon supplying current under an ON state of the transfer element. The light-emitting array generates a light image in accordance with a light emission current.

Growing community of inventors

Osaka, Japan

Yasunao Kuroda