Abstract: A light source emits excitation light to discharge gas that flows through a dielectric tube. A ground electrode unit includes a first ground electrode and a second ground electrode arranged at a distance from each other in an axial direction of the dielectric tube. A high-voltage electrode is provided between the first ground electrode and the second ground electrode. A first distance between the first ground electrode and the high-voltage electrode is shorter than a second distance between the second ground electrode and the high-voltage electrode. A cover is provided on an outer wall of the dielectric tube at a position between the first ground electrode and the high-voltage electrode. The light source is arranged to emit excitation light such that an optical axis thereof is directed toward a position where the cover is not provided on the outer wall of the dielectric tube.

Abstract: Provided is a variable-wavelength surface emission laser having a wide wavelength variation range. A partial region of a thin-plate substrate (22) and a movable mirror (20), the partial region being positioned between an air gap (G1) and a movable gap (G2), can move toward the air gap (G1) side or the movable gap (G2) side.

Abstract: A liquid supply unit includes an outer shell, a liquid supply portion that is arranged in the outer shell and can supply a liquid to the liquid ejection apparatus, and an engaged structure including an engaged portion that can engage with the engagement portion of the liquid ejection apparatus, and a first opening that is formed in the outer shell and through which the engagement structure can be inserted. The engaged portion is arranged further inward than an outer surface of the outer shell.

Abstract: It is therefore an object of the disclosure of this document to attain a data transmission system with a simple transmitter implementing polarization multiplexing using either DML or EAM and a receiver with only one PD. A data transmission system 1 which comprises a transmitter 3 and a receiver 5, wherein the transmitter 3 comprises a first signal processor 11 and an optical signal generator 13, the optical signal generator 13 outputs an optical signal which comprises X and Y polarization components, ex(t) and ey(t), and wherein the first signal processor 11 receives a first data stream, Sx, and a second data stream, Sy, and controls the X and Y polarization components to reflect the first and the second data streams, respectively, wherein the receiver 5 comprises only one photodetector 21 and a second signal processor 23.

Abstract: It is therefore an object of the disclosure of this document to attain a data transmission system with a simple transmitter implementing polarization multiplexing using either DML or EAM and a receiver with only one PD. A data transmission system 1 which comprises a transmitter 3 and a receiver 5, wherein the transmitter 3 comprises a first signal processor 11 and an optical signal generator 13, the optical signal generator 13 outputs an optical signal which comprises X and Y polarization components, ex(t) and ey(t), and wherein the first signal processor 11 receives a first data stream, Sx, and a second data stream, Sy, and controls the X and Y polarization components to reflect the first and the second data streams, respectively, wherein the receiver 5 comprises only one photodetector 21 and a second signal processor 23.

Abstract: A liquid supply unit includes an outer shell; a contact portion that is disposed in the outer shell and that is configured to electronically connect to the apparatus-side terminal by making contact with the apparatus-side terminal; a liquid supply port that is disposed on the outer shell and used for inserting the liquid introducing portion; and a receiving portion that extends in a protruding direction in which the guide member protrudes outward in a mounting state in which the liquid supply unit is mounted onto the liquid ejection apparatus, and that is configured to receive the guide member. At least a part of the receiving portion is located between the liquid supply port and the contact portion in a predetermined direction orthogonal to a direction in which the receiving portion extends.

Abstract: A liquid supply unit includes an outer shell; a contact portion that is disposed in the outer shell and that is configured to electronically connect to the apparatus-side terminal by making contact with the apparatus-side terminal; a liquid supply port that is disposed on the outer shell and used for inserting the liquid introducing portion; and a receiving portion that extends in a protruding direction in which the guide member protrudes outward in a mounting state in which the liquid supply unit is mounted onto the liquid ejection apparatus, and that is configured to receive the guide member. At least a part of the receiving portion is located between the liquid supply port and the contact portion in a predetermined direction orthogonal to a direction in which the receiving portion extends.

Abstract: An object is to identify an abnormal mounted state of a liquid supply unit to a liquid ejection apparatus. There is provided a liquid supply unit configured to supply a liquid to a liquid ejection apparatus that comprises a first electrode assembly including a first electrode and a second electrode; an engagement structure; and a mounting structure which the liquid supply unit is mounted to. The liquid supply unit comprises a liquid supply portion; an engaged structure configured to be engaged with the engagement structure in a mounted state and thereby restrict a motion of the liquid supply unit in a first direction that is a direction of dismounting the liquid supply unit; and an electrically conductive portion provided in the engaged structure.

Abstract: A liquid supply unit includes an outer shell, a liquid supply portion that is arranged in the outer shell and can supply a liquid to the liquid ejection apparatus, and an engaged structure including an engaged portion that can engage with the engagement portion of the liquid ejection apparatus, and a first opening that is formed in the outer shell and through which the engagement structure can be inserted. The engaged portion is arranged further inward than an outer surface of the outer shell.

Abstract: A liquid supply unit includes an outer shell, a liquid supply portion that is arranged in the outer shell and can supply a liquid to the liquid ejection apparatus, and an engaged structure including an engaged portion that can engage with the engagement portion of the liquid ejection apparatus, and a first opening that is formed in the outer shell and through which the engagement structure can be inserted. The engaged portion is arranged further inward than an outer surface of the outer shell.

Abstract: A liquid supply unit that includes a liquid ejection apparatus and configured to be mounted onto a holder unit that has a liquid introducing needle that extends in a first direction includes an outer shell, a liquid supply port, and an engagement structure including a first engagement portion, in which the first engagement portion is disposed on a mounting direction side of the outer shell at a position that overlaps with the outer shell when the liquid supply unit is viewed from the demounting direction side.

Abstract: An object is to suppress reduction of the stability of electrical connection between a liquid ejection apparatus and a liquid supply unit. A liquid supply unit (20) configured to be mountable to a liquid ejection apparatus (50) that has a first electrode (930a) and a second electrode (930b) comprises a first contact portion (cpb) configured to be in contact with the first electrode (930a) in a state that the liquid supply unit (20) is mounted to the liquid ejection apparatus (50); a second contact portion (cpb) configured to be in contact with the second electrode (930b) in the state that the liquid supply unit is mounted to the liquid ejection apparatus (50); and a wall portion (40) configured such that the first contact portion (cpb) and the second contact portion (cpb) are placed therein.

Abstract: A liquid supply unit that includes a liquid ejection apparatus and configured to be mounted onto a holder unit that has a liquid introducing needle that extends in a first direction includes an outer shell, a liquid supply port, and an engagement structure including a first engagement portion, in which the first engagement portion is disposed on a mounting direction side of the outer shell at a position that overlaps with the outer shell when the liquid supply unit is viewed from the demounting direction side.

Abstract: A liquid supply unit includes an outer shell, a liquid supply portion that is arranged in the outer shell and can supply a liquid to the liquid ejection apparatus, and an engaged structure including an engaged portion that can engage with the engagement portion of the liquid ejection apparatus, and a first opening that is formed in the outer shell and through which the engagement structure can be inserted. The engaged portion is arranged further inward than an outer surface of the outer shell.

Abstract: An object is to identify an abnormal mounted state of a liquid supply unit to a liquid ejection apparatus. There is provided a liquid supply unit configured to supply a liquid to a liquid ejection apparatus that comprises a first electrode assembly including a first electrode and a second electrode; an engagement structure; and a mounting structure which the liquid supply unit is mounted to. The liquid supply unit comprises a liquid supply portion; an engaged structure configured to be engaged with the engagement structure in a mounted state and thereby restrict a motion of the liquid supply unit in a first direction that is a direction of dismounting the liquid supply unit; and an electrically conductive portion provided in the engaged structure.

Abstract: At least one of making an ink replenishing operation easy and making it possible to select one out of a plurality of types of ink replenishment containers in order to perform ink replenishment is achieved. An ink replenishment assist apparatus includes a plug detachably mounted to the ink inlet of an ink tank and a conduit. The conduit has a first opening open to the inside of the ink tank in an in-use state of the ink replenishment assist apparatus, a second opening positioned on an opposite side to the first opening, and open to the outside of the ink tank, and a channel that brings the first opening and the second opening into communication with each other.

Abstract: An ink replenish adjunctive device is used to replenish an ink to an ink tank that includes an ink inlet member having a flow path in an axial direction. The ink replenish adjunctive device includes a connection portion having an end that is connectable to the ink inlet member in a liquid-tight state, and an ink inflow portion that is configured to allow the ink flow toward the connection portion.

Abstract: A further improvement in convenience is desired in conventional liquid ejecting systems. A liquid supplying unit is mountable to a carriage that has a first projection, a second projection and a liquid introduction needle. The unit includes six wall portions. The first wall portion is provided with a liquid supplying portion connectable to a liquid introduction needle, a first recess portion adapted to receive the first projection, and a second recess portion adapted to receive the second projection. In a planar view of the first wall portion, the liquid supplying portion is positioned closer to the fifth wall portion than to the sixth wall portion, and when the first wall portion is equally divided into a first region, a second region and a third region, the first recess portion is positioned in the first region, and the second recess portion is positioned in the third region.

Abstract: An attachment is mountable on a carriage in place of a liquid container that contains liquid and that is mounted on the carriage having a liquid jet head for jetting liquid, so that the attachment can supply liquid introduced from outside to the liquid jet head. The attachment has a pressure control means provided in a flow passage which is formed in an attachment body and through which the liquid introduced from the outside is supplied to the liquid jet head.

Abstract: A circuit board of an ink cartridge is provided with a plurality of terminals, with the contact portions of the plurality of terminals forming a plurality of lines. The contact portions of two terminals used for detecting installation are positioned in a first line, and the contact portion of a power terminal is positioned between the two terminals. The first line may be positioned to a leading side when the ink cartridge is moved in a prescribed direction to effect installation in a printer. Alternatively, the first line may be the line closest to an opening of an ink delivery port. Alternatively, the first line may be the line closest to an ink delivery needle.