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Optical position and/or shape sensing

A technology of optical path and optical signal, applied in the field of optical measurement, can solve the problems of expensive, difficult to manufacture optical fiber, etc.

Active Publication Date: 2012-09-26
INTUITIVE SURGICAL OPERATIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Third, fibers with multiple cores and Bragg gratings (conventional optical strain gauges) forming helices in sufficient ratios are difficult and expensive to fabricate

Method used

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  • Optical position and/or shape sensing
  • Optical position and/or shape sensing
  • Optical position and/or shape sensing

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Embodiment Construction

[0062] In the following description, for purposes of explanation and not limitation, specific details are set forth, such as specific nodes, functional entities, techniques, protocols, standards, etc., for an understanding of the described technologies. It will be apparent to those skilled in the art that other embodiments than the specific details disclosed below may be employed. In other instances, detailed descriptions of well-known methods, devices, techniques, etc. are omitted so as not to obscure the description with unnecessary detail. The individual functional blocks are shown in the figures. Those skilled in the art will appreciate that the functions of those blocks may be implemented using a single hardware circuit, software programs and data in combination with a suitably programmed microprocessor or general purpose computer, an application specific integrated circuit (ASIC) and / or one or more digital signal processor (DSP) to achieve. Software program instruction...

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Abstract

An accurate measurement method and apparatus are disclosed for shape sensing with a multi-core fiber. A change in optical length is detected in ones of the cores in the multi-core fiber up to a point on the multi-core fiber. A location and / or a pointing direction are / is determined at the point on the multi-core fiber based on the detected changes in optical length. The accuracy of the determination is better than 0.5% of the optical length of the multi-core fiber up to the point on the multi-core fiber. In a preferred example embodiment, the determining includes determining a shape of at least a portion of the multi-core fiber based on the detected changes in optical length.

Description

[0001] This application claims the benefit of U.S. Provisional Patent Application 61 / 243,746, filed September 18, 2009, U.S. Provisional Patent Application 61 / 255,575, filed October 28, 2009, and U.S. Provisional Patent Application 61 / 2010, filed June 1, 2010. 350,343, the entire contents of which are hereby incorporated by reference. technical field [0002] The technical field relates to light measurement, and more particularly to light position and / or shape sensing. Background technique [0003] Shape measurement is a general term that includes sensing the position of a structure in three-dimensional space. This measurement corresponds to the position of the object as seen by the human eye. Since the human eye is constantly doing this task, this measurement may appear simple. If the length of the rope is considered, a person may physically measure every inch along the rope in order to estimate its shape. However, this task is monotonous and becomes more difficult with ...

Claims

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Application Information

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IPC IPC(8): G01B11/24G02B6/10G01N21/41
CPCG02B6/02042G01B11/18G01B11/24G01L1/242G01L1/246G01M11/025G01M11/331G01M11/31G01M11/3172G01M11/3181G01B11/16G01B11/168
Inventor 马克·E·弗罗加特贾斯丁·W·克莱恩道恩·K·吉福德史蒂芬·托德·克瑞格
Owner INTUITIVE SURGICAL OPERATIONS INC
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