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: Provided is an in vivo examination apparatus including an illumination unit emitting two types of illumination light in different wavelength bands; and an image acquisition unit having sensitivity to the wavelength bands of the two types of illumination light. Blood and background tissue have higher reflectances than a predetermined threshold to illumination light in a first wavelength band, blood has a lower reflectance than the threshold to illumination light in a second wavelength band, and a condition (R1b/R1a)>(R2b/R2a) is satisfied, where R1a is the reflectance of the background tissue to the illumination light in the first wavelength band, R1b is the reflectance of the blood to the illumination light in the first wavelength band, R2a is the reflectance of the background tissue to the illumination light in the second wavelength band, and R2b is the reflectance of the blood to the illumination light in the second wavelength band.

Abstract: Provided is an in vivo examination apparatus including an illumination unit emitting two types of illumination light in different wavelength bands; and an image acquisition unit having sensitivity to the wavelength bands of the two types of illumination light. Blood and background tissue have higher reflectances than a predetermined threshold to illumination light in a first wavelength band, blood has a lower reflectance than the threshold to illumination light in a second wavelength band, and a condition (R1b/R1a)>(R2b/R2a) is satisfied, where R1a is the reflectance of the background tissue to the illumination light in the first wavelength band, R1b is the reflectance of the blood to the illumination light in the first wavelength band, R2a is the reflectance of the background tissue to the illumination light in the second wavelength band, and R2b is the reflectance of the blood to the illumination light in the second wavelength band.

Abstract: A light source apparatus includes a first rotational filter section that can place a blue filter, a green filter and a magenta filter in a light path, a second rotational filter section that can place a yellow filter in the light path and a band selection filter section that can place an NBI filter that limits blue and green light to a narrow band, wherein the first and the second rotational filter sections are controllable so that in the case of normal light imaging, the yellow filter is placed in the light path when the magenta filter is placed in the light path and in the case of narrow band imaging, the NBI filter is placed in the light path LP and the yellow filter is placed in the light path when the green filter is placed in the light path.

Abstract: A light source apparatus includes a first rotational filter section that can place a blue filter, a green filter and a magenta filter in a light path, a second rotational filter section that can place a yellow filter in the light path and a band selection filter section that can place an NBI filter that limits blue and green light to a narrow band, wherein the first and the second rotational filter sections are controllable so that in the case of normal light imaging, the yellow filter is placed in the light path when the magenta filter is placed in the light path and in the case of narrow band imaging, the NBI filter is placed in the light path LP and the yellow filter is placed in the light path when the green filter is placed in the light path.

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: An endoscope apparatus for reducing a halation for a large observation area without an illumination nonuniformity includes an insertion part which has an end having a wide-angle object optical system with two or more types of illumination optical systems having different illumination strength or light distribution. An illumination optical system having a greater illumination strength or wider light distribution is arranged on both sides of the end in a direction of a long side of a screen of the wide-angle object optical system. An illumination optical system having a lesser illumination strength or narrower light distribution is arranged on both sides of the end in a direction of a short side of the screen of the wide-angle object optical system.

Abstract: A larger number of micromirrors arranged on an illumination optical path of a lamp in a light source device for supplying an illumination light to an endoscope and by using a silicon chip as a base are arranged the micromirrors in a two-dimensional are set at two angles. When the micromirrors are set at one of the two angles, a reflected light is supplied to the light guide. When the micromirrors are set at the other angle, the micromirrors are driven such that the reflected light is not supplied to the light guide. An intensity of illumination light supplied to the light guide or the like is adjusted at a high speed by using a brightness level by selected the micromirrors at the two angles respectively, so that an endoscope image which can be easily observed is obtained.

Abstract: An apparatus and method is disclosed which stabilizes the light incident a light guide end over a guaranteed operating lifetime of a lamp used to illuminate the light guide end. The apparatus and method minimize variation in illumination incident a light guide end without, for example, controlling the electrical input to the lamp. The invention is especially effective for light guides having a narrow outer diameter, and compensates not only for movement of a region of maximum luminosity, as occurs in lamps where the cathode is partially consumed during operation of the lamp, but also for the lamp luminosity decreasing with age.

Abstract: An endoscope apparatus for reducing a halation for a large observation area without an illumination nonuniformity includes an insertion part which has an end having a wide-angle object optical system with two or more types of illumination optical systems having different illumination strength or light distribution. An illumination optical system having a greater illumination strength or wider light distribution is arranged on both sides of the end in a direction of a long side of a screen of the wide-angle object optical system. An illumination optical system having a lesser illumination strength or narrower light distribution is arranged on both sides of the end in a direction of a short side of the screen of the wide-angle object optical system.