Sharp Kabushiki Kaisha Corporation

Hitachi Cable, Inc.

Sharp Kabushiki Saisha

Yukio Kurata

Yoshio Yoshida

Takahiro Miyake

Kuniaki Okada

Hiroyuki Yamamoto

Yasuo Nakata

Keiji Sakai

Kazuya Kitamura

Yorishige Ishii

Hideaki Fujita

Toshihiro Tamura

Nobuo Ogata

Tetsuo Iwaki

Tetsuo Ueyama

Kohji Minami

Hideaki Sato

Toshiyuki Matsushima

Toshiya Nagahama

Renzaburo Miki

Katsuhiro Kubo

Kouji Minami

Yoshihiro Sekimoto

Hiroshi Nakanishi

Toshio Ishikawa

Shigeki Tsuji

Noboru Fujita

Yoshifumi Iwai

Toshiyuki Tanaka

Takeshi Yamaguchi

Hideyoshi Yamaoka

Mitsuo Ishii

Katsushige Masui

Hiroshige Hirajima

Yukiko Nagasaka

Naotaka Otsuka

Hisato Uetsuka

Shinya Yoshida

Hirobumi Ouchi

Atsushi Asada

Motohiko Yamamoto

Taizo Yokota

Hikaru Nishihara

Yukinori Nishitani

Renzaburou Miki

Hiroshi Ogata

Etsuji Minami

Mitsuharu Tomura

Kazuko Inoue

Takayuki Inoue

Teruaki Inoue

Hideaki Satou

Teruaki Inoue, Deceased

Toshiyuki Matushima

In a micro-lens array substrate () that includes first and second micro-lens arrays () respectively having a plurality of lenses, the first micro-lens array () is sandwiched between two inorganic dielectric substrates (), and the second micro-lens array () is formed on one of the two inorganic dielectric substrates ().

Micro-lens array substrate and production method therefor, and projection type liquid crystal display unit using those

A position of a first module () with respect to an optical fiber () is determined in accordance with a receiving efficiency at the first module () with respect to light emitted from the optical fiber (). Power of light coupled into the optical fiber () from the first module () is set in accordance with a value of a far-end reflectivity on a side of the first module () in the position so as to satisfy a predetermined formula. By giving priority to determining a condition that significantly influences an improvement of an eye opening ratio, it is possible to manufacture an optical communication system at a low cost and with more freedom in manufacturing. Thus provided is a method of manufacturing an optical communication system, the method allowing for manufacturing an optical communication system at a low cost and with more freedom in manufacturing.

Method of manufacturing optical communication system

An optical component according to the present invention comprises a substrate, and at least one optical element obtained by processing at least one thick optical film provided on the substrate. The optical component has a plurality of surfaces substantially not parallel to a surface of the substrate.

Optical component and method for producing thick polyimide film

An optical pickup can be provided, the optical pickup being capable of recording and playback of a plurality of optical disks having different specs by using light beams of different wavelengths, and further being suitable for integrating the semiconductor lasers and light receiving elements into a single package, by including: first and second semiconductor lasers adjacently disposed; a three-beam diffraction grating for generating three beams for tracking control; a second hologram element for diffracting light of the second semiconductor laser to guide it to a photosensor; a complex polarization beam splitter (PBS) for reflecting only light from the first semiconductor laser; and a first hologram element for diffracting light of the first semiconductor laser to guide it to the photosensor.

Optical pickup

A lightweight, highly reliable optical pickup including a singlet objective lens is offered by correcting coma aberrations which adversely affect properties of the objective lens having an increased NA. A convergent optical system is composed of a singlet objective lens with a NA of 0.75 or more and includes an aberration-correcting optical system which corrects coma aberrations due to an inclination or shift of central axes of both surfaces of the objective lens or an inclination of the objective lens or the optical storage medium to an optical axis of the optical pickup.

Optical pickup for optically reading/writing data including convergent and aberration correction optical systems

An object of the invention is to provide a method of manufacturing a microlens array and a projection-type liquid crystal display apparatus which can increase the efficiency of use of light, facilitate a method of manufacturing a microlens array and reduce the cost of equipment. By an operation of only irradiating a first lens with parallel light which has an intensity distribution corresponding to the shape of a second lens and irradiating an ultraviolet curing resin layer with transmission light, the first and second lenses are placed with a high alignment accuracy in a mutual positional relation thereof. By irradiating the first lens with the parallel light, it becomes possible to uniformly expose a broad area, and it becomes possible to expose by the wafer.

Method of microlens array and projection type of liquid crystal display apparatus

An optical communication module including: an emission member for emitting a transmission light beam; and a connection member for detachably connecting an optical fiber for external communication with the emission member, the connection member including a tubular accommodation part for coaxially receiving and fixing an end of the optical fiber to be connected, wherein the emission member and the connection member are arranged such that the transmission light beam intersects with an optical axis of the optical fiber at a predetermined angle to enter an end face of the optical fiber when the optical fiber is connected and the transmission light beam collides with an inner wall of the accommodation part when the optical fiber is detached.

Optical communication module

An optical pickup device which includes (A) a light source, and (B) an objective lens and an aberration correcting optical system which are located in a light path from the light source to an optical recording medium is so arranged that the aberration correcting optical system imparts a phase distribution to luminous flux which transmits the aberration correcting optical system, so as to correct a predetermined aberration; and an amount of phase of the aberration correcting optical system when correcting the aberration is set in such a manner that the aberration correcting optical system imparts a larger amount of phase at a position farther from a point where the aberration correcting optical system crosses an optical axis of light emitted from the light source. With this, it is possible to increase a tolerance for the center misalignment of the objective lens so as to reduce aberration caused by the center misalignment.

Optical pickup device

An exposing apparatus for a microlens array allows for easy alignment and attains high accuracy. An exposing method for a microlens array attains high accuracy and high light efficiency. The exposing apparatus for a microlens array includes a micro fly-eye lens for converting a light beam from a light source into a secondary point light source, a transmittance distribution mask for adjusting the luminance of the light of the secondary point light source, and a collimator lens for converting the light of adjusted luminance into a parallel light beam and for guiding the parallel light beam, via a first microlens array which is formed in advance, to a photosensitive resin layer to be a second microlens array. The light emitted from the light source is transmitted through the micro fly-eye lens, the transmittance distribution mask, and the collimator lens. The light is then adjusted to a desired luminance to expose the photosensitive resin of a microlens substrate.

Exposing apparatus and exposing method for microlens array

An objective lens is a single-lens objective lens both surfaces of which are aspherical. The objective lens has a numerical aperture not less than 0.75, and is made of glass satisfying 1.75<n, and 35<v, where n is a refractive index of the glass for at least one of used wavelengths, and v is an Abbe number for a d-lay. With this arrangement, it becomes possible to provide an objective lens which is downsized, has less aberration, and corrects the aberration easily, without a decline in light utilization efficiency; a method for correcting a manufacturing error thereof; and an optical pick-up device using the objective lens.

Objective lens, method for correcting manufacturing error thereof, and optical pick-up device using the same

An objective lens is made up of a light-source-side lens and a medium-side lens wherein at least either one of rim portions of respective opposing surfaces of the light-source-side lens and the medium-side lens forms a rise-up section projected towards the other lens, the rim portion which forms the rise-up section and the rim portion of the other lens at least partially contact one another, and these two lens are fixed together by an adhesive resin layer formed in a spacing between the respective rim portions. With the foregoing structure, an objective lens made up of a pair of lenses which has high rigidity as a whole and is capable of high speed recording and reproducing by suppressing adverse effects of resonance can be realized.

Objective lens, optical pickup-device equipped with same and assembling method of same

In the organic waveguide of the present invention, on a buffer layer and a core section made of organic polymer which are formed on a substrate, there is provided a masking clad which serves as a mask when the organic polymer is processed by dry etching and which constitutes an upper clad, and an overclad made of inorganic dielectric such as silicon oxide is formed around the core section.

Organic waveguide and manufacturing method thereof and optical part using the same

A two-way optical communication device for use in a two-way optical communication system for transmitting and receiving an optical signal via a single optical fiber, comprises a light emitting element for generating transmitted light, a photodetector for receiving incoming light emitted from the optical fiber, and a reflection mirror made of a thin film having a high reflectance, having first and second surfaces, the first surface being opposite to the second surface. An optical member including the reflection mirror is provided closer to the optical fiber than the light emitting element. The incoming light emitted from the optical fiber is reflected by the first surface of the reflection mirror to be guided to the photodetector. The transmitted light emitted from the light emitting element or the transmitted light reflected by an end surface of the optical fiber is reflected by at least a portion of the second surface of the reflection mirror to prevent the transmitted light from entering the photodetector.

Two-way optical communication device, two-way optical communication system, and method for assembling two-way optical communication device

A method for producing an optical device having a polyimide film through which a light beam is transmitted, which comprises applying a solution containing a polyamic film-forming starting material on a substrate and then baking the resultant under vacuum to form the polyimide film.

Optical devices made with vacuum-baked films

Growing community of inventors

Tenri, Japan

Yukio Kurata