Abstract:
The invention is provided with main body case (4) containing therein an air blower for circulating ambient air and a heat exchanger for exchanging heat between the ambient air circulated by the air blower and inside air, flange (13) provided in main body case (4) and having wall surface joining surface (13b) joined to wall surface (2a) where main body case (4) is arranged, and cover (12) attached to flange (13), having a louver in a side of the inside air, and a plurality of opening holes in a side of the ambient air and covering the ambient air side of main body case (4), thereby making an attachment and a detachment of cover (12) easy, and achieving a reduction of a maintenance work.
Abstract:
A joint device enables to join a brace member, into which regulated pretension is exactly introduced, to unmovable connector nodes, comprising a steel rod 1 having a swelled portion 1A and a threaded connector portion 1B formed on the end thereof, respectively, one sleeve 3 providing an external threaded part 3A joined to one node 2M, which contacts a swelled portion 1A: and another sleeve 4 providing an external threaded part 4A joined to node 2N, which engages threaded connector portion 1B. The length from a node-contact face 3c of sleeve 3 to a node-contact face 4c of sleeve 4 is selected equal to difference of length between both nodes 2, 2 from length for generating a preferable elongation enough to introduce regulated pretension into steel rod 1. A brace member 13 is disposable between both nodes 2, 2 and regulated pretension is introducible thereinto when depth of connecting screw hole 2m of sleeve 2M is equal to or more than difference of summation of length of joining threaded part 3A, length of-swelled portion 1A and length of joining threaded part 4A from length for generating an elongation.
Abstract:
A light emitting device capable of adjusting height difference between the light emitters and optical waveguides individually and easily with high accuracy is realized. The light emitting device comprises multiple light emitters; an optical multiplexer comprising the openings of multiple optical waveguides at the incidence end for light from the multiple light emitters and the opening of an optical waveguide combining said multiple optical waveguides at the light exit end; and multiple drivers driving said multiple light emitters, respectively, along the tilt direction of a surface tilted at a given angle with respect to the surface on which said optical waveguides are formed, wherein said light emitters are provided at an angle that makes the central axes of light from said light emitters in the light emission direction parallel to the surface on which said optical waveguides are formed.
Abstract:
An optical semiconductor device package includes a disc-shaped stem, metallic leads in rod form penetrating the stem in the direction of the thickness to protrude from a main surface of the stem, and a mount extending vertically from the main surface of the stem, with a plane part of the mount facing the leads. A dielectric substrate is mounted on the plane part, and an optical semiconductor chip is mounted thereon. Two impedance-adjusting dielectric substrates which are rectangular in plan view are provided extending in parallel with the leads, to cover the plane part facing the leads.
Abstract:
An optical multiplexing/demultiplexing device comprise a plurality of propagation waveguides comprising an input waveguide capable of receiving input light and an output waveguide outputting light of a given wavelength among the wavelengths included in the input light and resonance waveguide that is an optical waveguide provided between adjoining waveguides and extends in a longitudinal direction in which both the adjoining waveguides extend, wherein the adjoining waveguides are an adjoining pair among the propagation waveguides. The distance between the resonance waveguide and each of the adjoining waveguides of the resonance waveguide and a length in the longitudinal direction of the resonance waveguide are set so as to form a transition part, wherein when a light comprising a transition wavelength set to the transition part passes through the transition part of one of the adjoining waveguides, the light of the transition wavelength component shifts to the other adjoining propagation waveguide.
Abstract:
Multiple optical semiconductor devices each outputs light beam corresponding to electric signals. A Peltier element is so provided as to be able to cool the multiple optical semiconductor devices. Resistors are so provided near the optical semiconductor devices as to be able to transfer to one of the optical semiconductor devices heat they produce when energized.