Alps Electric Co., Ltd.

Kimihiro Kikuchi

Yoshihiro Someno

Atsunori Hattori

Motohiko Otsuki

Shoichi Kyoya

Ken Okochi

Miki Ono

Shigeru Hatakeyama

Motohiko Ohtsuki

Takashi Kihara

Yoshihiko Hirama

Kengo Yamada

Takehiko Tomizawa

A method of manufacturing a lens barrel assembly includes forming a lens barrel by deep drawing into a cylindrical shape, forming a lens-retaining portion that retains a lens at one of two open sides of the lens barrel, and forming a component-receiving portion that receives an electric component at the other open side of the lens barrel. The lens-retaining portion has an outer diameter that is smaller than an outer diameter of the component-receiving portion and a wall thickness that is larger than a wall thickness of the component-receiving portion.

Method of manufacturing a lens barrel assembly

A cylindrical holder material having a thin deformed portion is located in a press forming die. An optical element material is installed inside the holder material and the holder material and the optical element material are heated to their respective softening temperatures, thereby forming a cylindrical holder from the holder material and an optical element from the optical element material by press forming the holder material and the optical element material that have been heated to their respective softening temperatures. Thus, the optical element is integrated inside the holder and the deformed portion of the holder is deformed towards the outside thereof by a pressing force applied by the optical element.

Method of manufacturing holder-mounted optical element

A lens is fitted into a metal ring that covers the outer peripheral surface of the lens and can be soldered to a fixture member. The side cylindrical part of the metal ring is expanded toward the outer peripheral direction thereof by the pressure of the optical material put inside it, and, thus expanded, it defines the final dimension of the metal ring. One of the two openings formed on both sides of the side cylindrical part of the metal ring is so designed as to have a curving cylindrical part that extends from the side cylindrical part, and this curving cylindrical part is folded toward the optical functional face of the optical device to construct a metal ring-fitted optical device.

Method for fabricating metal ring-fitted optical device, and metal ring-fitted optical device

A holder/optical-element assembly includes a holder and an optical element disposed within the holder. The holder has an inner periphery surface in which at least one opening is provided, and the optical element is formed with at least one protrusion extending outward from an outer periphery of the optical element. The protrusion of the optical element is engaged with the opening of the holder.

Holder/optical-element assembly

A metal ring for an optical element that is served to cover a peripheral side surface of a lens and served to fix the lens to a mounting member by means of soldering is provided with a thin-wall sleeve a diameter of which is expanded toward a peripheral direction by means of pressure received from an optical material disposed inside the metal ring to thereby obtain a final peripheral side surface size, a thin-wall portion having an inside periphery near an extension of an inside peripheral surface of the thin-wall sleeve on one of apertures of the thin-wall sleeve, and a holding portion comprising a flange that projects from an edge of the aperture toward the aperture. A metal ring for an optical element, a method for fabrication of the optical element having the metal ring, and an optical element having a metal ring of the invention employ the abovementioned metal ring.

Method for fabrication of optical element having metal ring

An optical fiber connector includes a receptacle casing, a cylinder provided in the receptacle casing, and a wire spring disposed on the inner wall of the cylinder. In the optical fiber connector, a fiber holding part provided at an end of an optical fiber is inserted into the cylinder, the outer periphery of the fiber holding part is elastically pressed by the wire spring in the direction perpendicular to an optical axis of the optical fiber, the outer periphery of the fiber holding part is brought into abutment with the inner wall of the cylinder, and the end of the optical fiber is fitted to the receptacle casing.

Optical fiber connector and optical communication module using the same

Provided is a high-precision holder-mounted optical element that makes it possible to correct a volume error of an optical element material. In a holder-mounted optical element where an optical element is accommodated into a cylindrical holder , the holder has a thin deformation portion that is deformed by the pressure applied from the inner circumferential side thereof and a surplus portion , which press-contacts with the deformation portion , is formed in the optical element

Holder-mounted optical element

An optical semiconductor device to increase optical communication speed has a silicon substrate with an etched V-shaped first groove portion, a light emitting element which has an optical axis in the direction of the first groove portion and is mounted to the upper surface of the silicon substrate, and a high NA aspheric lens is mounted in the first groove portion. The first groove portion is composed of first and second opposing inclined surfaces and a third inclined surface perpendicular to the first and second inclined surfaces. A slit is cut in the silicon substrate extends in a direction perpendicular to the direction of the first groove portion and includes the first, second, and third inclined surfaces. The aspheric lens is mounted to the first and second inclined surfaces and has a part thereof protruding in the slit.

Optical semiconductor device provided with high-NA lens

An end face of a plastic optical fiber end is treated so as not to extrude to the core side face when the plastic optical fiber end is softened and fused. The core end face of the plastic optical fiber end is pressed intermittently on a mold that is heated to a certain temperature to soften and fuse the core end face to thereby transfer the transfer face of the mold on the core end face.

Plastic optical fiber end face treatment method

An optical element includes a lens holder, and an optical lens integrally held by an inner wall portion of the lens holder and having a lens optical surface at an opening in the lens holder in the direction of the optical axis of the optical lens. A projecting portion is formed in the inner wall portion of the lens holder and adjacent to the opening. An outer peripheral edge surface of the lens optical surface is placed under the projecting portion and is pressed in contact with the projecting portion over the entire periphery.

Optical element having integrated optical lens and lens holder, and production method therefor

Beam-splitting/coupling apparatus having frame holding optical filter

A diaphragm structure is provided at an outer edge portion on an incident side of a lens which converges a collimated incident light and outputs the converged light, the diaphragm structure being constructed so that a portion of the collimated incident light is reflected away from or toward an optical axis of the collimated light.

Lens having diaphragm structure at outer edge portion on incident side thereof and optical unit using same

The optical communication system comprises at least one transmitter provided with a light source for emitting white light having a wide wavelength band, an optical fiber for transmitting white light emitted from the light source and at least one optical switch placed along the optical fiber, and at least one receiver. The optical switch has an optical filter for selectively splitting predetermined different wavelengths and reflecting other wavelengths, and a switching device for cutting off or passing lights of the wavelengths split by the optical filter. An optical filter merges light transmitted by the switching device with lights of other wavelengths reflected by the optical filter and transmits it to the optical fiber.

Optical switch and optical communication system using the same

In an optical transmitting and receiving module, a transmitting light beam having a wavelength &lgr;,emitted from an light-emitting device passes through an optical demultiplexing filter and enters an optical fiber, and a receiving light beam emitted from an end face of the optical fiber is reflected from the optical demultiplexing filter and is incident on a light-receiving device. A cover for covering the front space of the optical demultiplexing filter is placed on a casing block, and a tongue piece serving as a returning-light preventing unit is formed on the cover. When a transmitting light beam emitted from the light-emitting device is reflected from the optical demultiplexing filter, the direction in which the reflected light advances is changed by the tongue piece so that the reflected light is not incident on the light-receiving device.

Growing community of inventors

Miyagi-ken, Japan

Kimihiro Kikuchi