An endoscope apparatus includes a laser diode, an illumination section, an image sensor and a light source control section. The light source control section supplies the laser diode with different drive currents in sequence within exposure time of the image sensor to emit a plurality of laser lights in sequence from the laser diode and which controls the drive currents in such a manner that a combined wavelength spectrum width of combined laser light obtained by combining the emitted laser lights with the exposure time is made greater than a wavelength spectrum width of each of the laser lights.

A kit configured to perform oral cavity inspection comprising at least one of: an observation component, a light source component and a dental disclosing agent applied on dental surfaces wherein interaction between a line of sight of the observation component and a light beam of the light source component at the dental disclosing agent exhibits an angle of illumination a equal to or less than 35 degrees.

An endoscope includes: a light source for emitting white light or narrow band light; a color filter having a first filter for passing light in WLI and NBI, a second filter for passing light in WLI, a third filter for passing light in NBI; and a demosaicing processor that: generates a color image signal based on a luminance component in WLI under the white light; and performs interpolation for a pixel of a luminance component in WLI at a position of a pixel corresponding to the first filter using a pixel corresponding to the second filter under the narrow band light, and then, performs interpolation for a pixel of a luminance component in NBI at the position of the pixel corresponding to the first filter based on a pixel corresponding to the first filter and the pixel of the luminance component in WLI, thereby generating a color image signal.

A light emitting device includes a solid-state light emitting element that emits a pulsed light, a wavelength converter including a phosphor that emits a wavelength-converted light having a wavelength longer than that of the pulsed light, and a light guide member including a light input end and a light output end. The wavelength converter is disposed on a light output end side of the light guide member. The pulsed light is input to the light guide member through the light input end and output through the light output end to be emitted to the wavelength converter. The wavelength-converted light has a fluorescence spectrum having a maximum intensity value in a wavelength range exceeding 710 nm. An electronic apparatus includes the light emitting device. An inspection method includes using the light emitting device.

A light emitting device includes a light source that emits a primary light having a light energy density exceeding 0.5W/mm.sup.2, and a first phosphor that absorbs the primary light to convert the primary light into a first wavelength-converted light having a wavelength longer than that of the primary light. The first phosphor includes a compound serving as a host, the compound being a simple oxide including one kind of metal element or a composite oxide including a plurality of different kinds of the simple oxide as an end member. When an energy conversion value at a peak wavelength of the primary light is E1 electron volts and an energy conversion value at a fluorescence peak wavelength of the first wavelength-converted light is E2 electron volts, a bandgap energy of a crystal of the simple oxide is larger than a sum of the E1 electron volts and the E2 electron volts.

An endoscope light emitting device (1) is a light emitting device for use in a fluorescence imaging method. The endoscope light emitting device includes: a solid-state light emitting element (2); and a wavelength converter (3) including a first phosphor (4) that emits first wavelength-converted light (7), wherein the first wavelength-converted light has a light component across at least a whole of a wavelength range of 700 nm or more and 800 nm or less. An endoscope (11) includes the endoscope light emitting device. A fluorescence imaging method is a method using the endoscope light emitting device or the endoscope, and includes the steps of: administering a fluorescent drug to a subject; and applying the first wavelength-converted light (7) to the subject with whom the fluorescent drug has made contact.

A wavelength conversion device disclosed adopts a drive gear and driven gear as a main transmission structure, and disposes optical fiber plugs at a center of the driven gear. When a central shaft of the driven gear is unmovable, the rotation of the drive gear will drive the driven gear to rotate, and the rotation of driven gear will drive the optical fiber insertion rod to move up and down, thereby completing an insertion-extraction operation of the optical fiber insertion rod. When the central shaft of the driven gear is movable, i.e., when the optical fiber plugging rod is completely above the baseplate, the driven gear is locked with the optical fiber plug and thus they both cannot be rotated about their own axis, the driven gear will drive the fiber displacement plate to rotate along the drive gear under the action of the drive gear, thereby realizing the rotational translation of the optical fiber plugs, and reaching the switching wavelengths of laser at the optical fiber output interface. The wavelength conversion device is simple and easy for ordinary medical personnel to operate, thereby promoting the development of laser therapeutic instruments in the medical field.

The present invention relates to an illuminating instrument (1) for diagnostics, therapy or surgery of a body part, comprising: at least one optical fiber (4) for transmitting electromagnetic radiation directly from an electromagnetic radiation source (3) to the body part; and a housing (5) which supports the optical fiber (4); the optical axis of the light-output end of the optical fiber (4) circumferentially extends in an illumination portion (52a) in the housing (5) which is annular shaped and arranged to face the body part; the optical fiber (4) in the illumination portion (52a) has one or more diffusing regions (4a) for difusing the electromagnetic radiation to the outside of the optical fiber (4) through the circumferential surface (4b) thereof, a coupling device (2) which supports the electromagnetic radiation source (3) for generating the electromagnetic radiation, characterized by further comprising: a conversion means (6) which is supported by the housing (5) without directly contacting the electromagnetic radiation source (3), and arranged between the diffusing regions (4a) and the body part for converting the electromagnetic radiation into visible light for illuminating the body part, and wherein the light-entrance end of the optical fiber (4) is directly optically connected with the electromagnetic radiation source (3), wherein the conversion means (6) is outside an optical interface between the light-entrance end of the optical fiber (4) and the electromagnetic radiation source (3).

An endoscope apparatus according to the present invention includes: a light source device configured to continuously emit first light of a first wavelength band, and sequentially emit second light of plural second wavelength bands different from the first wavelength band and different from each other; and an imaging device including: a spectroscopic unit configured to spectrally separate light from a subject, the light being due to illumination light emitted by the light source device, into light of the first wavelength band and light of the second wavelength bands; a first imaging element configured to generate a first image signal by receiving and photoelectrically convert the light of the first wavelength band spectrally separated by the spectroscopic unit; and a second imaging element configured to generate a second image signal by respectively receiving and photoelectrically converting the light of the second wavelength bands spectrally separated by the spectroscopic means.

Driving an emitter to emit pulses of electromagnetic radiation according to a jitter specification in a hyperspectral, fluorescence, and laser mapping imaging system is described. A system includes an emitter for emitting pulses of electromagnetic radiation and an image sensor comprising a pixel array for sensing reflected electromagnetic radiation. The system includes a driver for driving emissions by the emitter according to a jitter specification. The system is h that at least a portion of the pulses of electromagnetic radiation emitted by the emitter comprises one or more of a hyperspectral emission, a fluorescence emission, and/or a laser mapping pattern.