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Non-destructive 3D imaging and component identification method for cultural relics based on two-photon excited fluorescence

A technology of two-photon excitation and identification method is applied in the field of three-dimensional imaging and component identification of cultural relics by two-photon excitation fluorescence, which can solve the problems of inability to identify substances, inability to obtain information on mineral composition and other components, and achieve the effect of deep imaging.

Inactive Publication Date: 2018-07-27
NORTHWEST UNIV
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Problems solved by technology

However, this method cannot identify the material and cannot obtain information on the composition of the ore

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  • Non-destructive 3D imaging and component identification method for cultural relics based on two-photon excited fluorescence

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Embodiment Construction

[0026] Comply with the above technical solutions, such as figure 1 As shown, the present invention provides a method for non-destructive three-dimensional imaging and component identification of cultural relics based on two-photon excited fluorescence. The method includes the following steps:

[0027] Step 1: Reflect a beam of femtosecond laser through the laser scanner, and focus it on the target position of the cultural relic to be measured by the variable-focus microscope objective lens;

[0028] More specifically, the femtosecond laser is emitted by a femtosecond laser, and a half-wave plate, a polarization beam splitter cube, and a quarter-wave plate are sequentially arranged between the femtosecond laser and the laser scanner;

[0029] In step 1, the femtosecond laser output by the femtosecond laser passes through a half-wave plate, and the half-wave plate is rotated to change the polarization direction of the femtosecond laser, so that the femtosecond laser passes throu...

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Abstract

The invention discloses a method for non-destructive three-dimensional imaging and component identification of cultural relics based on two-photon excited fluorescence: Step 1: Reflect a beam of femtosecond laser through a laser scanner, and further focus it on the target position of the cultural relic to be measured by a variable focus microscope objective. ; Step 2, detect the reflected two-photon excited fluorescence; Step 3, scan the target point by point with the laser scanner to obtain a two-dimensional image of the two-photon excited fluorescence; Step 4, change the focal length of the microscope objective lens to obtain double-photon excited fluorescence at different depths. Photon-excited fluorescence two-dimensional image; Step 5, reconstruct a series of two-photon excited fluorescence two-dimensional images obtained at different depths to obtain a three-dimensional image; Step 6, the components of the cultural relics can be identified according to the wavelength range of the fluorescence. The characteristic fluorescence images of components can determine the distribution of different components in mineral materials. The invention can realize cultural relic composition analysis and three-dimensional imaging at the same time; it can realize intrusive, non-contact and non-destructive detection.

Description

technical field [0001] The invention belongs to the category of nonlinear optical technology and technological archaeology, and specifically relates to a method for three-dimensional imaging and component identification of cultural relics by two-photon excitation fluorescence. Background technique [0002] my country is an ancient civilization with a long history, with rich and colorful and precious cultural heritage, and there are extremely rich cultural relics preserved above and below ground. These historical relics not only contain the unique spiritual value of the Chinese nation, but also are non-renewable precious resources and the crystallization of national wisdom. In recent years, with the trend of economic globalization and the acceleration of the modernization process, my country's cultural heritage and its living environment have been seriously threatened, and it is urgent to strengthen the research and protection of cultural heritage. How to use modern scientif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
CPCG01N21/6402G01N21/6458
Inventor 程雪梅陈浩伟任兆玉张倩白晋涛
Owner NORTHWEST UNIV
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