Sumitomo Electric Industries, Limited

Kazuhiro Tanida

Hisao Go

Osamu Akita

Mitsutoshi Kamakura

Atsushi Miki

Toshio Takagi

Goro Sasaki

Munetsugu Ueyama

Hiroyuki Yabe

Jiro Shinkai

Yoko Watanabe

Shinichi Kanazawa

Masaki Mori

Filter element for ballast water treatment

A main portion of an optical module includes a thermoelectric cooler and a chip carrier placed on the cooler A semiconductor light-emitting device a lens photodetectors , and an etalon are directly or indirectly mounted on the chip carrier . Supporting members and are also fixed on the chip carrier . A roof is supported by the supporting members and positioned above the etalon The roof supporting members and chip carrier are maintained at substantially equal temperatures by the cooler As a result, the temperature of the etalon is stabilized, and therefore the variation in the lock wavelength is suppressed.

Optical module and optical device

A flat portion has a flat top surface, on which a chip carrier is provided. A light-emitting element is mounted on the chip carrier. A vertical portion is integral with the flat portion and extends vertically, i.e., perpendicularly to the flat top surface of the flat portion. A metal plate made of a metal having good welding performance is silver-brazed onto the vertical portion. A lens barrel containing a lens for focusing a light beam from the light-emitting element is inserted in a through-hole of the vertical portion and the metal plate, and welded to the metal plate so that the optical axes of the light-emitting element and the lens coincide with each other.

Lens holding block enabling accurate lens positioning

Optical receiver/transmiter module

Optical receiver/transmitter module

Growing community of inventors

Yokahama, Japan

Kazuhiro Tanida