摘要:
When using a spectral endoscope, the spectral characteristic can be precisely set to be suitable for use conditions. There is provided a spectral endoscope (1) comprising: a channel (3) arranged along a longitudinal direction in an insertion unit to be inserted into a body cavity; an image pickup section (8) which captures an image in a vicinity of the distal end of the insertion unit (2); a variable spectral section (7) capable of changing the wavelength of light to be incident into the image pickup section (8); a reference light member (10) which emits light of a known wavelength characteristic, or has a known absorption characteristic, and is to be introduced into a field-of-view range of the image pickup section (8) through the channel (3); a control unit (11) which controls the image pickup section (8) to capture an image of the reference light member (10) that has been introduced through the channel (3), while controlling the variable spectral section (7) to change the wavelength of light to be incident into the image pickup section (8); and a calibration unit (12) which calibrates the spectral characteristic of the variable spectral section (7) according to the image of the reference light member (10) that has been captured by the image pickup section (8).
摘要:
Provided is a fluorescence endoscope system for observing fluorescence from a fluorochrome attached to or absorbed in biological tissue, including an excitation light source that emits excitation light that excites the fluorochrome; an image-acquisition section that acquires fluorescence emitted from the biological tissue when irradiated with the excitation light from the excitation light source; an autofluorescence signal setting section that sets an autofluorescence signal intensity to be emitted from the biological tissue when irradiated with the excitation light; and an image compensation section that compensates fluorescence image information acquired by the image-acquisition section on the basis of the autofluorescence signal intensity set by the autofluorescence signal setting section.
摘要:
Oscillating circuitry built in integrated circuitry (1) comprises a ring oscillator (31) for generating a first clock, an external oscillator (40) capable of generating a second clock in either one of two oscillating modes which is determined according to an external circuit (12 and 13, or 6 through 8) connected to terminals (2 and 3) thereof, and an internal clock selection circuit (41) which delivers the first clock as an internal clock to the integrated circuitry (1) just after the integrated circuitry (1) is activated or reset, stops the delivery of the first clock and simultaneously furnishes a signal held at a logic high level as the internal clock in response to a control signal for instructing a selection of the second clock, and then determines whether or not the external oscillator (40) is generating the second clock properly, and which furnishes the second clock as the internal clock when it determines that the external oscillator (40) is generating the second clock properly.
摘要:
The invention relates to an internal body observation device which includes an ordinary observation light source, an ordinary observation irradiation optical system, a special observation light source, a special observation irradiation optical system, an observation optical system for transmitting the light from an observation target, a detection means configured to detect the light transmitted from the observation optical system as a detection signal, and a processing unit for separating the detection signal in the respective light sources and making the detection signal into images, wherein the light from any one of the ordinary observation light source and the special observation light source is modulated, and the modulated light can be radiated to the observation target together with the light from the other light source, and the detection signal detected by the detection means is separated by the processing unit based on the frequency of the modulation.
摘要:
A site to be observed, such as a lesion, is easily observed by means of bright fluorescence images without increasing the output of a light source. Provided is a fluorescence imaging apparatus (1) including a wideband excitation portion (7) that radiates wideband excitation light capable of exciting a plurality of fluorescent substances contained in a subject (A); a narrow-band excitation portion (8) that radiates narrow-band excitation light capable of exciting at least one fluorescent substance among the fluorescent substances; an excitation-band switching unit (9) that performs switching between the wideband excitation portion (7) and the narrow-band excitation portion (8); and a fluorescence detector (15) having a detection wavelength band enabling detection of any kind of fluorescence from the subject (A) caused by the wideband excitation light and the narrow-band excitation light.
摘要:
The invention provides a fluorescence endoscope system, a fluoroscopy apparatus, a fluoroscopy method, a fluorescence-information processing apparatus, and a fluorescence-information processing method which allow superior fluoroscopy by reducing the effect of autofluorescence. Provided are an excitation-light radiating part for irradiating an object under examination in a body cavity with excitation light having a wavelength included in an absorption spectrum of a fluorescent dye deposited on or absorbed in the object under examination in a state where the fluorescent dye is not deposited on or absorbed in the object under examination; a correction-information acquiring part for acquiring correction information that can be used to correct for the effect of autofluorescence of the object under examination on observation results of fluorescence emitted from the fluorescent dye deposited on or absorbed in the object under examination upon irradiation with the excitation light, based on observation results of the object under examination upon irradiation with the excitation light by the excitation-light radiating part.
摘要:
An optical system and optical apparatus prevent degradation of the S/N ratio due to switching between OCT and OCM observation modes and attain a high S/N ratio in both the observation modes. The optical system includes a light source 1 and a light-branching member 2 for branching light from the light source 1 into a reference light path and a signal light path. An objective 3 is placed in the signal light path. A light-scanning system 5 scans light in the signal light path with respect to a sample 4 placed in the signal light path. A beam diameter changing optical system 6 changes the beam diameter of light entering or exiting the light-scanning system 5. A light-combining member 7 combines together the reference light path and the signal light path. A light-detecting element 8 detects light combined by the light-combining member 7.
摘要:
A living body function measurement method comprises separating a light from a low coherence light source into a signal light and a reference light, modulating a frequency of at least one of the signal light and the reference light, irradiating the signal light to an observation area of a living body sample, giving a stimulation to the living body sample from an outside of the living body sample, synthesizing the signal light via the observation area and the reference light and detecting a heterodyne interference signal, and measuring a living body function of the observation area by measuring a change in the heterodyne interference signal when the stimulation is changed.
摘要:
An optical system having a polarization compensating optical system capable of compensating for retardation with high accuracy. The polarization compensating optical system includes a half-wave plate (22), a first optical system (23a) having at least one uncoated refracting surface (26, 27), and a second optical system (23b) having at least one coated refracting surface (24, 25). The total rotation of the polarization plane introduced in rays passing through the entire optical system is reduced to approximately zero by rotation of the polarization plane produced by the first optical system (23a), and the total retardation introduced in the rays is reduced to approximately zero by retardation produced by the second optical system (23b).
摘要:
An optical microscope is provided with an aperture element 13 and an optical modulation element 14 that creates an image having the detecting sensitivity of the phase contrast imaging technique while simultaneously realizing an image having the three-dimensional sense provided by the modulation contrast imaging technique. There are four regions (two of which may have the same transmittance value and be contiguous in portions of the optical modulation element), are provided on a single optical modulation element 14, these regions including a first light absorbing region 14a having transmittance Ta, a second light absorbing region 14b having transmittance Tb and positioned adjacent to the first light absorbing region, a first light transmitting region 14c having a transmittance Tc and positioned adjacent to the first light absorbing region 14a, and a second light transmitting region 14d having a transmittance Td, wherein Ta is greater than Tb and less than Tc, Ta is less than Td, Tc is greater than 0.5, and Td is greater than 0.5.