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US 2011/0218404 A1Published application
Light sensing system and endoscope system
AssigneeOlympus Medical Systems Corp.
InventorKatsumi HIRAKAWA
Life of this patent
Estimating the term…
Abstract
The medical instrument includes an optical fiber sensor in which a plurality of FBG sections are formed, a reflector that forms reference light, a light source that outputs light by stepwise changing light beams of wavelengths of a predetermined interval, a coupler that splits light and generates interference light, a detection section that detects the interference light and a calculation section that calculates amounts of deformation of the FBG sections based on the detection result of the detection section.
Claims9
A light sensing system comprising:
- an optical fiber sensor in which a plurality of fiber Bragg grating sensor sections are formed;
- a light source that outputs light by stepwise changing frequencies with a passage of time at a frequency interval of ½ times or less a full width at half maximum of a reflected light spectrum determined by characteristics of the fiber Bragg grating sensor sections;
- a light supply section that supplies the light outputted from the light source to the optical fiber sensor;
- a reference light forming section that forms reference light to be caused to interfere with reflected light from the optical fiber sensor;
- an interference section that generates interference light by causing the reference light to interfere with the reflected light;
- a detection section that detects the interference light from the interference section;
- and
- a calculation section that calculates amounts of deformation of the plurality of fiber Bragg grating sensor sections based on the detection result of the detection section.
5 more elements
An endoscope system including a light sensing system, the light sensing system comprising:
- an optical fiber sensor disposed in an insertion portion of an endoscope in which a plurality of fiber Bragg grating sensor sections are formed;
- a light source that outputs light by stepwise changing frequencies with a passage of time at a frequency interval of ½ times or less a full width at half maximum of a reflected light spectrum determined by characteristics of the fiber Bragg grating sensor sections;
- a light supply section that supplies the light outputted from the light source to the optical fiber sensor;
- a reference light forming section that forms reference light to be caused to interfere with reflected light from the optical fiber sensor;
- an interference section that generates interference light by causing the reference light to interfere with the reflected light;
- a detection section that detects the interference light from the interference section;
- and
- a calculation section that calculates amounts of deformation of the plurality of fiber Bragg grating sensor sections and the shape of the insertion portion based on the detection result of the detection section.
5 more elements
A light sensing system comprising:
- an optical fiber sensor in which a plurality of fiber Bragg grating sensor sections are formed;
- a light source that outputs light by stepwise changing frequencies with a passage of time at a frequency interval of ½ times or less a full width at half maximum of a reflected light spectrum determined by characteristics of the fiber Bragg grating sensor sections;
- light supply means for supplying the light outputted from the light source to the optical fiber sensor;
- reference light forming means for forming reference light to be caused to interfere with reflected light from the optical fiber sensor;
- interference means for generating interference light by causing the reference light to interfere with the reflected light;
- detection means for detecting the interference light from the interference means;
- and
- a calculation section that calculates amounts of deformation of the plurality of fiber Bragg grating sensor sections based on the detection result of the detection means.
5 more elements
An endoscope system including a light sensing system, the light sensing system comprising:
- an optical fiber sensor disposed in an insertion portion of an endoscope in which a plurality of fiber Bragg grating sensor sections are formed;
- a light source that outputs light by stepwise changing frequencies with a passage of time at a frequency interval of ½ times or less a full width at half maximum of a reflected light spectrum determined by characteristics of the fiber Bragg grating sensor sections;
- light supply means for supplying the light outputted from the light source to the optical fiber sensor;
- reference light forming means for forming reference light to be caused to interfere with reflected light from the optical fiber sensor;
- interference means for generating interference light by causing the reference light to interfere with the reflected light;
- detection means for detecting the interference light from the interference means;
- and
- calculation means for calculating amounts of deformation of the plurality of fiber Bragg grating sensor sections and the shape of the insertion portion based on the detection result of the detection means.
5 more elements
Dependencies are inferred from the claim text.