Abstract: A body-insertable device is introduced into a desired part in a body for injecting a liquid medicine stored in a casing into the desired part. The body-insertable device includes a projecting portion which projects an injection needle injecting the liquid medicine toward the desired part; a detecting unit which detects a position relation between a biological tissue surface in the desired part and the injection needle; and a control unit. The control unit controls an amount of projection of the injection needle according to the position relation detected by the detecting unit, and controls a puncture depth of the injection needle from the biological tissue surface.

Abstract: A capsule-medical-device dedicated power source starter that allows switching, by an application of a magnetic field to a magnetic switch that is provided in an inside of a capsule medical device and has a particular sensitivity direction in the magnetic field, a driving of the capsule medical device from an OFF state to an ON state, includes: an insertion part that is formed in a central axis direction and to which the capsule medical device is inserted so that a longitudinal axis direction of the capsule medical device is along the central axis direction; and a magnetic circuit that generates magnetic force lines which are substantially symmetric about the central axis as an axis of symmetry in any planar surfaces including the central axis of the insertion part.

Abstract: An object of the present invention is to continuously display a series of images of the inside of the subject until the intra-body indwelling capsule is placed at the desired site in the subject, and to easily place the intra-body indwelling capsule endoscope at the desired site. The intra-subject indwelling system 1 according to the present invention includes an endoscope device 14 for imaging a first image of the inside of the subject; an intra-body indwelling capsule 2, for imaging a second image of the inside of the subject; a monitor device 12 for receiving the second image; a receiving device 13, a monitor 11 for displaying the first image or the second image; and an image switching device 10. The intra-body indwelling capsule 2 is arranged at the distal end of the inserting unit 5, and the separation from the inserting unit 5 is detected and the separation detection result is transmitted. The receiving device 13 receives the separation detection result.

Abstract: A capsule medical apparatus includes a living tissue drawing portion in which a space for drawing the living tissue into a body of the capsule medical apparatus is formed; a movable unit that includes an engaging unit, which can be engaged with the living tissue of the subject, and that moves on a surface of the body of the capsule medical apparatus and in the living tissue drawing portion; an injection needle that has an ejection port for a drug and that protrudes such that the ejection port is positioned in the living tissue drawing portion; and an injection needle driver that drives the injection needle such that the injection needle protrudes.

Abstract: A semiconductor optical amplifier is provided having polarization independent optical amplification characteristics and a flat gain spectrum over a wide wavelength region. In the semiconductor optical amplifier including a multi-quantum well active layer formed of well layers and barrier layers alternately laminated to each other on an InP substrate, the well layers and the barrier layers each have a tensile strain, and the tensile strain of each of the barrier layers is larger than the tensile strain of each of the well layers.

Abstract: A semiconductor optical amplifier includes an n-type semiconductor layer, a p-type semiconductor layer an active layer provided between the n-type semiconductor layer and the p-type semiconductor layer, the active layer transmitting an optical signal and a current-injection part that injects current into the active layer via the n-type semiconductor layer and the p-type semiconductor layer, the active layer including a first active layer that includes AlGaInAs, and a second active layer that includes GaInAsP, the second active layer provided closer to an output side than the first active layer, and the first active layer and the second active layer being butt-jointed.

Abstract: A capsule endoscope device includes an illumination unit that illuminates a living tissue using at least one of a white light illumination unit and a special light illumination unit; an imaging unit that captures an image of the tissue; a transmission unit that transmits imaging information containing the image; a storage unit that stores a threshold with respect to information on a distance between the endoscope and the tissue; a detection unit that detects the information; and an output unit that compares the information with the threshold, selects an image capturing condition of a special light observation mode if the distance is not larger than the threshold, selects an image capturing condition of a normal light observation mode if the distance is larger than the threshold, and outputs the selected image capturing condition to an operation unit related to image capturing.

Abstract: A semiconductor optical amplifier includes a semiconductor substrate, a lower cladding layer formed on the semiconductor substrate, a light absorption layer and an optical amplification layer formed on the lower cladding layer, and an upper cladding layer formed on the light absorption layer and the optical amplification layer. The band gap of a semiconductor material that forms the light absorption layer is wider than the band gap of a semiconductor material that forms the optical amplification layer. The difference between the band gap of the semiconductor material that forms the light absorption layer and the band gap of the semiconductor material that forms the optical amplification layer is 0.12 eV or more.

Abstract: A medical system includes: a medical device to be inserted into the body cavity; a rotating device for the medical device for rotating the medical device around the insertion axis; an image pickup device provided to the medical device; and an image capturing timing detection device for detecting a signal regarding image capturing timing performed by the image pickup device. Furthermore, the medical system includes: a rotating angle acquisition device for acquiring the rotating angle of the rotating device for the medical device regarding the image capturing timing in response to the output of the image capturing timing detection device; and an image acquisition device for performing rotation processing for the image captured by the image pickup device based upon the information regarding the rotating angle acquired by the rotating angle acquisition device, thereby acquiring the image subjected to a rotation processing.

Abstract: A body-insertable apparatus including a balloon for storing a medical fluid in a capsule-like casing, and an injection needle including an elastic membrane. The body-insertable apparatus discharges the medical fluid due to contraction of the balloon, applies a discharge pressure of the medical fluid to the elastic membrane to expand the elastic membrane, and projects the injection needle from the casing due to the expansion of the elastic membrane. Further, the body-insertable apparatus has a channel forming unit for forming a channel connecting to the balloon and a channel connecting to the injection needle, and a communication adjusting mechanism. The communication adjusting mechanism adjusts a communicated state between the channels and, thereby controlling the start of medical-fluid discharge operation by the balloon.

Abstract: A body-insertable apparatus includes a light-receiving unit that includes light-receiving elements each having a receiving wavelength spectrum; light-emitting units including a near ultraviolet light source whose peak of the emission intensity is near ultraviolet light with a wavelength deviated, from a receiving wavelength spectrum associated with the receiving wavelength spectrum, by a predetermined wavelength and including a yellow light source whose peak of the emission intensity is yellow; a selection unit that can select, from among the light-emitting units, light-emitting units corresponding respectively to the near ultraviolet and the yellow light sources; an image creating unit creating a normal-light image in accordance with a combined flat-shaped wavelength spectrum combined using the light-receiving unit or creating a special-light image in accordance with a combined sharp wavelength spectrum combined using a pixel that receives blue-color-component light of the light-receiving unit and a pixel th

Abstract: A capsule medical apparatus to be introduced into a subject includes a tissue collecting unit that collects in-vivo tissue; a storage unit that stores therein the in-vivo tissue that is collected by the tissue collecting unit; a liquid storing unit that stores therein liquid for suppressing autolysis of in-vivo tissue; a liquid supplying unit that supplies the liquid in the liquid storing unit to the storage unit; and a control unit that allows, in response to an instruction to start collecting the in-vivo tissue, the tissue collecting unit to collect desired in-vivo tissue and to store the collected in-vivo tissue in the storage unit and that then allows the liquid supplying unit to supply the liquid to the storage unit and makes the storage unit be in a liquid-tight state.

Abstract: An optical amplification control apparatus is formed from a semiconductor optical amplifier, a temperature adjustment unit adjusting the temperature of the semiconductor optical amplifier, and an optical gain control unit adjusting the temperature of the semiconductor optical amplifier by controlling the temperature adjustment unit, and varying an optical gain of the semiconductor optical amplifier. Thus, a pattern effect is suppressed even if the output light intensity (the intensity of amplified light) is increased.

Abstract: A capsule medical apparatus system includes a rotating magnetic field generation apparatus that generates a desired rotating magnetic field in three-dimensional directions, a capsule medical apparatus that includes a magnet and a needle for puncture that can be projected and retracted in a rotation direction of the rotating magnetic field and is rotated in the direction of the rotating magnetic field when the rotating magnetic field is applied to the magnet, a step-out operation detecting unit that detects a step-out operation by which the capsule medical apparatus is inversely rotated when a luminal surface is punctured with the needle, and a magnetic-field control instructing unit that controls the rotating magnetic field generation apparatus on the basis of a detection result performed by the step-out operation detecting unit.

Abstract: A semiconductor optical amplifier includes a semiconductor substrate; an active layer that includes a first region and a second region formed over the semiconductor substrate; and a reflection part that is formed along the second region and includes a first portion that reflects a first wavelength light and a second portion that reflects a second wavelength light with an optical gain lower than an optical gain of the first wavelength light; wherein, the first portion is formed closer to the first region side than the second portion.

Abstract: A polarization-independent SOA is provided which uses an InP substrate (11) as a semiconductor substrate and uses GaInNAs having introduced tensile strain as an active layer (14). With this configuration, the polarization independence is achieved by introducing the tensile strain, and high saturation optical output power is realized by reducing the film thickness of the active layer (14) as well as the gain peak wavelength is increased by reducing the band gap of the active layer (14) through use of GaInNAs made by adding nitrogen (N) to GaInAs as a material of the active layer (14) so as to achieve high gain especially in C-band and L-band even when band filling exits at the time of injecting a high current into the active layer (14).

Abstract: A polarization-independent SOA having an InP substrate used as a semiconductor substrate, and an active layer taking an MQW structure formed of a barrier layer made of GaInAs with tensile strain applied thereto and a well layer made of GaInNAs with no strain applied thereto alternately laminated in a plurality of layers, here, four layers of the well layer and five layers of the barrier layer are alternately laminated, is proposed.

Abstract: A body-introducable apparatus includes: a light source unit having a first light source that outputs first light and a second light source that outputs second light in a wavelength band different from that of the first light; a light distribution matching unit that matches distributions of the first light and the second light; an illuminating control unit that illuminates the inside of the subject by driving the light source unit; and an imaging unit that captures an image of the inside of the subject.

Abstract: A capsule medical apparatus includes a living tissue drawing portion in which a space for drawing the living tissue into a body of the capsule medical apparatus is formed; a movable unit that includes an engaging unit, which can be engaged with the living tissue of the subject, and that moves on a surface of the body of the capsule medical apparatus and in the living tissue drawing portion; an injection needle that has an ejection port for a drug and that protrudes such that the ejection port is positioned in the living tissue drawing portion; and an injection needle driver that drives the injection needle such that the injection needle protrudes.

Abstract: In an LSI that determines timing of DRAM refresh by a refresh timer to synchronize an external I/O signal and DRAM refresh timing with each other, a circuit configuration capable of controlling a value of the refresh timer by a CPU at arbitrary timing is employed. Alternatively, a circuit configuration capable of controlling the value of the refresh timer at arbitrary timing by an external terminal, or a circuit configuration capable of controlling the refresh timing directly from the external terminal without through the refresh timer.