Olympus Corporation

Junichi Nishimura

Atsuyoshi Shimamoto

Masato Fujiwara

Mitsuru Namiki

Ikutoshi Fukushima

Takeharu Innami

An endoscope apparatus includes: a light source that radiates a pulsed light beam onto an imaging subject; an imaging optical system; an image transmission optical system that transmits the image of the imaging subject; an optical sensor that has a light receiving surface on which a plurality of pixels are arrayed and that detects a light level of the image; and one or more processors, wherein the optical sensor obtains light levels by detecting, in a time division manner, a reflected light beam of the pulsed light beam at each of the pixels, and wherein the processors are configured to: calculate an observation distance to the imaging subject from the imaging optical system on a basis of the light levels.

Endoscope apparatus

A scanning observation apparatus () deflects illumination light with an actuator () through an illumination optical system () to scan an object (), subjects light from the object () to photoelectric conversion with an optical detector (), performs processing with an image processor (), and displays an image of the object () on a display (). A memory () stores information on optical characteristics related to chromatic aberration of magnification of the illumination optical system () relative to light of predetermined colors. A scanning pattern calculator () calculates a scanning pattern, on the object (), of light of each color using the information. Using the scanning pattern, the image processor () calibrates a plot position yielded by a photoelectric conversion signal from the optical detector () for light of each color and generates an image of the object (), thereby more easily correcting the chromatic aberration of magnification.

Scanning observation apparatus and image display method of scanning observation apparatus

An optical fiber is vibrated at an emitting end part by a scanning part, and light is irradiated from an emitting end face of the optical fiber onto an object to scan the object. The scanning part includes a pair of first direction coils facing each other in a first direction across the emitting end part, and a permanent magnet installed as penetrating the emitting end part. The permanent magnet is magnetized in the axial direction of the emitting end part. The scanning part drives, by supplying power to the first direction coils, the emitting end part to vibrate in the first direction in the second or higher-order resonance mode, forming nodes of the vibration within the permanent magnet. When in a state of non-vibration in the first direction, a relative distance between the permanent magnet and the first direction coils is smaller than that in other directions.

Optical scanning apparatus

Provided is an optical scanning image forming apparatus, including: a light source section; an illumination scanning section scanning illumination light from the light source section and irradiating the illumination light onto an object; a light detection section detecting detection light from the object; a calculation section calculating a drive waveform for providing a light scanning pattern to be formed by the illumination scanning section; and a coordinate for image construction; and an image drawing section drawing an image based on the detection light detected by the light detection section and the coordinate for image construction, the drive waveform consisting of, in a predetermined period, a plurality of frames of different phases. Also provided is an optical scanning image forming method.

Optical scanning image forming apparatus and optical scanning image forming method

This optical scanning method yields a high quality image. An emission end of an optical fiber is displaced two-dimensionally to scan light emitted from the optical fiber, the emission end being displaced with an optical scanning actuator that includes a first driver and a second driver for driving the emission end in different directions. A circular scanning area is scanned by controlling, with a driver controller, a first drive signal supplied to the first driver and a second drive signal supplied to the second driver so as to rotate a scanning pattern of the light while causing the scanning pattern to reciprocate repeatedly in a nearly parallel manner with constant length.

Optical scanning method and optical scanning apparatus

An optical scanning image forming apparatus includes: a light source section; an illumination scanning section; a light detection section; a calculation section calculating a drive waveform for providing a illumination light scanning pattern; and an image drawing section drawing an image, based on detection light detected by the light detection section and image construction coordinates, the calculation section providing different light scanning patterns to the illumination scanning section and calculating distortion correction data, based on comparison between data on the detection lights detected when scanned in the different scanning patterns. An optical scanning image forming method includes: providing different light scanning patterns to an illumination scanning section which scans the illumination light from a light source section to irradiate an object with the illumination light; and calculating distortion correction data, based on comparison between data on the detection light detected when scanned in the different scanning patterns.

Provided is an optical scanning observation apparatus including: a light source unit () for outputting laser light; a scanning part () for scanning, on an object of observation (), a condensing position of the laser light output from the light source; and a detection unit () for sampling signal light obtained through scanning of the laser light, and converting the signal light into an electric signal, in which a sampling time for detecting signal light per one sampling is varied in accordance with changes in scanning rate of the scanning part () scanning on the object of observation (). In this manner, variation in resolution of an image resulting from changes in scanning rate per each sampling can be reduced.

Optical scanning observation apparatus having variable sampling time, and method and computer readable storage device

There is provided a scanning endoscope including an optical scanning unit in which an angle at which illumination light is emitted from a leading edge of an insertion portion is changed to scan the emitted illumination light on an object, a plurality of light receiving portions which is circumferentially spaced apart at the leading edge of the insertion portion and receives return light returning from the object as a result of the optical scanning unit scanning the illumination light, a light detection unit that detects the intensity of the received return light, a return light selection unit that selects the return light whose intensity is equal to or smaller than a predetermined threshold, and a storage unit that stores the intensity of the return light selected by the return light selection unit in association with the position where the optical scanning unit scans the illumination light.

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Tokyo, Japan

Junichi Nishimura