Abstract: The endoscope system includes: a laser diode for an endoscope that emits illumination light whose amount can be controlled; an image pickup device that outputs an image pickup signal of an image obtained by receiving reflected light of the illumination light; a photodiode that receives a part of the illumination light of the laser diode; a thermistor that detects a temperature of the laser diode; a thermistor that detects a temperature of the photodiode; a detection light amount temperature correction circuit that corrects an amount of light received by the photodiode based on the temperature of the photodiode; and a laser diode control circuit that controls driving of the laser diode so that an amount of the illumination light becomes a set value based on a corrected amount of received light corrected by the detection light amount temperature correction circuit and the temperature of the laser diode.

Abstract: An endoscope according to an embodiment includes a grip unit, an insert unit, a light source, a light exit part provided in the insert unit, a first light guide, a second light guide, and an optical connector disposed in the grip unit. The first light guide has a first entrance end located on the side of the light source and a first exit end located on the side of the optical connector. The second light guide has a second entrance end located on the side of the optical connector and a second exit end located on the side of the light exit part. The light that goes out from the first exit end enters the second entrance end through the optical connector.

Abstract: An endoscope system includes a light source that emits illumination light, an image sensor that captures an image of an object toward which the illumination light is emitted, and a processor. The processor is configured to determine whether a fluid is present in the object. If the fluid is not present in the object, the processor switches to a first observation mode in which to illuminate the object by first illumination light. If the fluid is present in the object, the processor switches to a second observation mode in which to illuminate the object by second illumination light. The second illumination light includes is larger than the first illumination light in a relative ratio of long wavelength components.

Abstract: An optical apparatus having a holding portion and a tubular portion further includes a light source, a light guide which is formed of a medium having a refractive index higher than 1, and an optical converting portion. The light guide has a first light guiding area having an incidence end surface and a second light guiding area having an exit end surface. A diameter of the incidence end surface is larger than a diameter of the exit end surface, and at least a part of the second light guiding area is included in the tubular portion.

Abstract: The nonaqueous electrolyte secondary battery according to one embodiment includes a flat wound electrode body in which a positive plate and a negative plate are wound via a separator and characterized in that the positive plate has a positive core and a positive mixed material layer that is formed on both sides of the positive core, the positive mixed material layer includes a lithium metal composite oxide represented by general formula Li1+xMaO2+b (in the formula, x, a, and b satisfy the conditions x+a=1, ?0.2<x?0.2, and ?0.1?b?0.1, and M includes Ni and Co and at least one element selected from the group consisting of Mn and Al), and the positive plate has a flexibility index of 15 to 19. Such a positive plate is capable of having a high packing density while suppressing cracks in the positive mixed material layer and buckling of the positive plate and the negative plate.

Abstract: A positive electrode plate that has a positive electrode active material layer formed on a positive electrode core, wherein the positive electrode core has, on an edge side, a thick portion which has a thickness that is greater than the thickness of a portion of the positive electrode core that has the positive electrode active material layer formed on both sides, and the positive electrode plate has a first region that extends into the thick portion from the portion of the positive electrode core that has the positive electrode active material layer formed on both sides and a second region that is positioned outside the first region in the thick portion. The average maximum diameter of the metal crystal grains that compose the first region is smaller than those of the second region.

Abstract: A rectangular secondary battery is provided with: a rectangular exterior body having an opening, a bottom part, a first lateral wall, a second lateral wall, a third lateral wall, and a fourth lateral wall; a sealing plate for sealing the opening; and a flat wound electrode body obtained by winding a positive electrode plate and a negative electrode plate with a separator therebetween, wherein a plurality of the flat wound electrode bodies are arranged in the rectangular exterior body. The flat wound electrode bodies each have: a flat region formed at the center, a first bent region having a bent outer surface and being formed on one end side of the flat region; and a second bent region having a bent outer surface and being formed on the other end side of the flat region.

Abstract: Provided is a secondary battery which can be produced with high efficiency. This secondary battery is provided with: a belt-like positive electrode plate having a plurality of positive electrode tabs; a belt-like negative electrode plate having a plurality of negative electrode tabs; a flat wound electrode body obtained by winding the positive electrode plate and the negative electrode plate with a belt-like separator therebetween; and a positive electrode collector (second positive electrode collector) connected to the plurality of positive electrode tabs. The plurality of positive electrode tabs in a state of being laminated are joined to the positive electrode collector (second positive electrode collector). Identification parts are formed on some positive electrode tabs of the plurality of positive electrode tabs.

Abstract: A secondary battery provided with: a belt-like positive electrode plate having a plurality of positive electrode tabs; and a positive electrode current collector which is connected so that the plurality of positive electrode tabs are stacked, wherein the positive electrode plate has a positive electrode core body and a positive electrode active material layer formed on the positive electrode core bodies. At one edge side of the positive electrode plate where the plurality of positive electrode tabs are provided, one surface of the positive electrode core body has formed thereon a first protrusion that protrudes from said surface of the positive electrode core body in the thickness direction of the positive electrode core body, whereas the other surface of the positive electrode core body has no protrusion formed to protrude from said other surface of the positive electrode core body in the thickness direction of the positive electrode core body.

Abstract: Provided are a highly reliable electrode plate and a secondary battery using the electrode plate. A positive electrode plate, which is for a secondary battery, has a positive electrode core body and a positive electrode active material layer formed on the positive electrode core body. The positive electrode core body has, at an end thereof, a thick part having a thickness larger than that of the center area of the positive electrode core body. The thick part includes a first projection that projects from one surface of the positive electrode core body in the thickness direction of the positive electrode core body. The positive electrode core body is formed of an aluminum alloy which contains 0.5-2.0 mass % of Mn.

Abstract: A light source device includes a detector that detects a remaining capacity, and a prediction calculation circuit that calculates a capacity consumption predictive value indicating a ratio of consuming a capacity of a supply source within a predetermined period of time in each illumination mode. The light source device further includes a capability calculation circuit that calculates a driving capability of the supply source corresponding to each of the illumination modes, based on the remaining capacity and the capacity consumption predictive value; and a reporting unit that reports the driving capability.

Abstract: The endoscope system includes: a laser diode for an endoscope that emits illumination light whose amount can be controlled; an image pickup device that outputs an image pickup signal of an image obtained by receiving reflected light of the illumination light; a photodiode that receives a part of the illumination light of the laser diode; a thermistor that detects a temperature of the laser diode; a thermistor that detects a temperature of the photodiode; a detection light amount temperature correction circuit that corrects an amount of light received by the photodiode based on the temperature of the photodiode; and a laser diode control circuit that controls driving of the laser diode so that an amount of the illumination light becomes a set value based on a corrected amount of received light corrected by the detection light amount temperature correction circuit and the temperature of the laser diode.

Abstract: An illumination unit includes a light guide to guide primary light, a conversion member to convert the primary light into secondary light, and a holder holding an exit end of the light guide and the conversion member. The holder includes an entrance portion that the primary light enters, an exit portion to emit illumination light including the secondary light, and a fixing portion fixing the conversion member between the entrance portion and the exit portion in a direction of a central axis of the primary light. The fixing portion is arranged in a planar region perpendicular to the central axis of the primary light and on an inner peripheral face of the holder. The conversion member is in contact with the fixing portion.

Abstract: An endoscope illumination apparatus includes a light convertor including first and second light conversion members that receive primary light emitted from a primary light source and convert at least one of the optical properties of the primary light, a detector that receives at least part of first light conversion light converted by the first light conversion member as detection light, and outputs a detection signal corresponding to a quantity of the detection light, and an operation estimation circuit that estimates, based on an amount of change in the detection signal output from the detector, whether any one of the first and second light conversion members is in an abnormal operation or both of the first and second light conversion members are in an abnormal operation.

Abstract: A light source device includes a primary light source that emits primary light, a light guide that guides the primary light, an optical conversion unit that converts the primary light emitted from the light guide and having a first light distribution angle into secondary light having a second light distribution angle and emits the secondary light, and a light distribution adjustment unit that adjusts the secondary light to illumination light having a third light distribution angle and emits the illumination light. The light distribution adjustment unit and the optical conversion unit slide each other. The light distribution adjustment unit allows a light distribution adjustment amount for adjusting the second light distribution angle of the secondary light to adjust to the third light distribution angle of the illumination light.

Abstract: An illumination unit includes a light guide to guide primary light, a conversion member to convert the primary light into secondary light, and a holder holding an exit end of the light guide and the conversion member. The holder includes an entrance portion that the primary light enters, an exit portion to emit illumination light including the secondary light, and a fixing portion fixing the conversion member between the entrance portion and the exit portion in a direction of a central axis of the primary light. The fixing portion is arranged in a planar region perpendicular to the central axis of the primary light and on an inner peripheral face of the holder. The conversion member is in contact with the fixing portion.

Abstract: A light source apparatus irradiates an observation target with first light in a wavelength region which does not include a wavelength region where an absorption peak of a target substance included in the observation target is present and second light in a wavelength region where the absorption peak is present. An image acquiring circuit includes an emphasized image information generating circuit which generates emphasized image information on the basis of first image information acquired by an imaging apparatus when the observation target is irradiated with the first light and second image information acquired by the imaging apparatus when the observation target is irradiated with the second light.

Abstract: An illumination apparatus includes a first wavelength converter which absorbs part of the first excitation light and emits first wavelength-converted light, a second wavelength converter which absorbs part of the first excitation light and emits second wavelength-converted light, a reflector including a reflecting surface which is arranged to surround the members, and a holder which holds the members. A first region where light distribution angles of light emitted from the members have a predetermined value or less and a second region where the light distribution angle is less than the predetermined value are present in a region surrounded by the reflecting surface. The holder holds at least one part of the wavelength converter and at least one part of the second wavelength converter at the first region.

Abstract: An illuminating device includes a light source unit configured to emit primary light, and an illuminating unit configured to generate illumination light based on the primary light. The illuminating unit includes a light converter configured to convert optical characteristics of the primary light. The light converter includes a light transmitter through which the primary light is transmitted, and a light diffuser formed within the light transmitter. The light diffuser is configured to diffuse part of the primary light, generating secondary light included in the illumination light. The light diffuser has a refractive index different from a refractive index of the light transmitter. The light diffuser has a hole formed within the light transmitter, a refractive index-modifying portion, or a crack portion.

Abstract: A subject observation system includes a light source and an image obtaining unit. The light source emits observation light including a spectral component of a wavelength and applies the light to a subject. The image obtaining unit images reflected light from an irradiation region of the subject to which the light has been applied and obtains at least two observation images in different wavelength regions based on image signals corresponding to a blue region, a green region and a red region. The light includes components of light emission spectra in the regions. The light emission spectrum in the blue region is smaller in a wavelength region in which absorption intensity for a specific observation target in the subject is relatively low than in other regions.