A Simultaneous Dynamic Measurement Method of Refractive Index and Shape

A technology of dynamic measurement and refractive index distribution, applied in measurement devices, phase influence characteristic measurement, instruments, etc., can solve problems such as inability to use liquid object measurement and reduction in measurement accuracy

Active Publication Date: 2019-01-04
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method still requires additional filling solution and cannot be applied to the measurement of liquid objects
In addition, this method introduces assumptions and approximations in the numerical calculation, which reduces the final measurement accuracy

Method used

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  • A Simultaneous Dynamic Measurement Method of Refractive Index and Shape
  • A Simultaneous Dynamic Measurement Method of Refractive Index and Shape
  • A Simultaneous Dynamic Measurement Method of Refractive Index and Shape

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Embodiment Construction

[0026] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0027] The present invention relates to an optical path system for simultaneous dynamic measurement of two-dimensional refractive index distribution and three-dimensional shape, such as figure 1 As shown, it includes: semiconductor laser diode pumped solid-state laser 1, fiber coupler 2, first fiber splitter 3, second fiber splitter 4, first optical fiber 5, second optical fiber 6, third optical fiber 7, The fourth optical fiber 8, the first collimating lens 9, the half-wave plate 10, the first polarization beam splitter prism 11, the first reflector 12, the second reflector 13, the Dove prism 14, the sample 15, the first microscope objective lens 16 , the second microscope objective lens 17, the third mirror 18, the fourth mirror 19, the first dichroic prism 20, the imaging lens 21, the aperture stop 22, the second collimating lens 23, the third collimating lens...

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Abstract

The invention relates to a method for dynamically measuring two-dimensional refractive index distribution and three-dimensional shape at the same time. The method utilizes advantages of full field, high resolution and dynamic measurement of digital holographic microscopy, and introduces a dove prism with polished short edges in a measurement optical path, and thus integration of a total internal reflection digital holographic microscopy optical path and a transmission-type digital holographic microscopy optical path is achieved. By means of angle-multiplexed and polarization-multiplexed technologies, the transmission-type digital holographic microscopy optical path is used to record object wave light phase distribution information including the refractive index and thickness distribution (or shape) of an object, and the total internal reflection digital holographic microscopy optical path is used to synchronously record the two-dimensional reflective index distribution information of the object, and thus by simple mathematical operation, dynamic measurement of the two-dimensional refractive index distribution and the three-dimensional shape of the object is achieved at the same time. The involved measurement method does not require an extra filling solution, is suitable for measurement of transparent / semi-transparent liquid or solid, and overcomes defects of existing methods.

Description

technical field [0001] The present invention relates to a method for simultaneous dynamic measurement of refractive index distribution and three-dimensional shape, in particular to a method that combines total internal reflection digital holographic microscopy with transmission digital holographic microscopy, and uses angle multiplexing and polarization multiplexing Technology, a method for simultaneous dynamic measurement of the refractive index distribution and three-dimensional shape of transparent / translucent liquid or solid samples. Background technique [0002] With its advantages of full-field, non-destructive, fast and high-resolution quantitative measurement of the amplitude and phase distribution of tiny object fields, digital holographic microscopy is useful for the measurement of the internal refractive index distribution of materials and the topography of living cell samples, material surfaces Analysis and detection of MEMS devices provide new and effective ways...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B9/023G01B11/24G01N21/45
CPCG01B9/023G01B11/2441G01N21/453
Inventor 赵建林张继巍马超杰邸江磊
Owner NORTHWESTERN POLYTECHNICAL UNIV
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