Abstract: The present invention relates to an optical wavelength multiplexing and dividing device of an array waveguide type diffraction lattice, which is capable of separating and picking up wavelength-multiplexed signals of various wavelengths, which are used in optical transmissions. An input side slab waveguide (3), a plurality of juxtaposed array waveguides (4), an output side slab waveguide (5) and a plurality of optical output waveguides (6) are connected, in order, to the outgoing sides of a plurality of optical input waveguides (2), thereby forming a waveguide pattern. The array waveguides (4) are formed so as to have lengths different from each other to cause the phases of individual lights to be deviated after propagating through the respective array type waveguides (4), wherein different lights as per wavelength are condensed at the incident ends (7) of optical output waveguides 6 by passing through the output side slab waveguides (5) and are outputted through the optical output waveguides (6).

Abstract: An optical multiplexer/demultiplexer 1 having a plurality of first waveguides 3, a first slab waveguide 4, an arrayed waveguide grating 5 having a plurality of waveguides, a second slab waveguide 6 and a plurality of second waveguides 7, the individual waveguides being connected in the above order. The ratio of a distance between the plurality of first waveguides 3 at a connecting portion with the first slab waveguide 4 to a distance between the plurality of second waveguides 7 at a connecting portion with the second slab waveguide 6 differs from a ratio of a focal length of the first slab waveguide 4 to a focal length of the second slab waveguide 6.

Abstract: An arrayed waveguide grating type optical multiplexer/demultiplexer includes input waveguides, an input-side slab waveguide, an arrayed waveguide diffraction grating, an output-side slab waveguide, and output waveguides. A junction between each input waveguide and the input-side slab waveguide is tapered such that the end portion of the input waveguide gradually widens in the width direction of the path toward the input-side slab waveguide, and includes two separate small-width waveguide portions arranged separately from the end portion of the input waveguide and extending in a line with taper of the tapered end portion, and a single large-width waveguide portion arranged separately from the small-width waveguide portions.

Abstract: Here is disclosed a full system rotatable scroll type fluid handling machine having a casing containing therein an electromotor, a driver scroll member and a follower scroll member, these two scroll members being rotatably driven by said electromotor to perform compression of refrigerant, wherein the casing is formed therein with a boss around which a shaft of a coupling is mounted so as to serve also as a rotational shaft of the electromotor for rotatably driving the driver scroll member and the boss supports a follower shaft of the follower scroll member. In this manner, several functions to which separate locations have conventionally assigned can be achieved on a single location, allowing an axial length of the machine to be reduced and thereby a compact machine to be obtained.

Abstract: A vane compressor includes a hollow stator, and a rotor which is received in the stator for rotation about an axis. The rotor is provided with a plurality of throughgoing passages which extend radially and outwardly relative to the axis. Each passage receives a vane which has an outer end face directed towards an inner circumference of the stator and an inner end face directed away from the inner circumference of the stator. The vanes are shiftable radially in the respective passages relative to the axis. A pressure medium is supplied under a first pressure to the inner end faces of the vanes to urge the same radially outwardly for engagement of the outer end faces with the inner circumference of the stator. When the rotor is rotated, the vanes are subjected to an additional second pressure resulting from centrifugal force. The second pressure additionally urges the vanes against the inner circumference of the stator.

Abstract: A vane compressor includes a hollow stator, and a rotor which is received in the stator for rotation about an axis. The rotor is provided with a plurality of throughgoing passages which extend radially and outwardly relative to the axis. Each passage receives a vane which has an outer end face directed towards an inner circumference of the stator and an inner end face directed away from the inner circumference of the stator. The vanes are shiftable radially in the respective passages relative to the axis. A pressure medium is supplied under a first pressure to the inner end faces of the vanes to urge the same radially outwardly for engagement of the outer end faces with the inner circumference of the stator. When the rotor is rotated, the vanes are subjected to an additional second pressure resulting from centrifugal force. The second pressure additionally urges the vanes against the inner circumference of the stator.