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1. US20140212091 - OPTICAL PROBE

注意: このテキストは、OCR 処理によってテキスト化されたものです。法的な用途には PDF 版をご利用ください。

[ EN ]

Claims

1. An optical probe, comprising:
an optical fiber that transmits light between a proximal end and a distal end, an optical fiber including a core region containing the central axis and having a refractive index n 1, a first cladding region surrounding the core region and having a refractive index n 2, a trench region surrounding the first cladding region and having a refractive index n 3, and a second cladding region surrounding the trench region and having a refractive index n 4, the refractive indices having a relationship of n 1>n 2>n 3<n 4;
an optical connector connected with the optical fiber at the proximal end;
a focusing optical system having one end connected with the optical fiber at the distal end, the focusing optical system focusing light emitted from the distal end of the optical fiber;
a deflecting optical system optically connected with the optical fiber at the distal end, the deflecting optical system deflecting the light emitted from the distal end of the optical fiber; and
a jacket tube surrounding the optical fiber, extending along the optical fiber, and being rotatable relative to the optical fiber, the optical connector, the focusing optical system, and the deflecting optical system.
2. The optical probe according to claim 1, wherein one end of the deflecting optical system is connected with the other end of the focusing optical system.
3. The optical probe according to claim 1, further comprising a support tube surrounding the optical fiber, extending along the optical fiber, arranged inside the jacket tube, and fixed to at least a portion of the optical fiber and the optical connector.
4. The optical probe according to claim 3, wherein the support tube has a structure in which a plurality of linear members are twisted.
5. The optical probe according to claim 3, wherein the support tube has a thickness of 0.15 mm or larger and a Young's modulus in a range from 100 GPa to 300 GPa.
6. The optical probe according to claim 1, wherein the optical fiber is configured such that an attenuation of a fundamental mode caused by a bend with a radius of 5 mm is lower than 1 dB/turn and an attenuation of the LP 11 mode caused by a bend with a radius of 140 mm is higher than 10 dB/m, with a predetermined wavelength in a range from 1.26 μm to 1.625 μm.