Double-channel full-range complex-spectral-domain optical coherence tomographic system

An optical coherence tomography and imaging system technology, which is applied in the field of dual-channel frequency-domain optical coherence tomography system and complex frequency-domain optical coherence tomography system, can solve the problem of increasing system complexity and system cost, and not paying attention to the reduction of sensitivity , rapid attenuation of imaging quality and other issues, to achieve the effect of reducing complexity, reducing sensitivity, and increasing imaging depth

Inactive Publication Date: 2012-08-22
SHANGHAI INST OF TECH
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Problems solved by technology

Among them, the first two methods are limited by the capabilities of spectrometers and light sources. The third method can expand the detection depth to twice the depth, but is affected by the dynamic capabilities of phase shifters such as PZT and system noise. The fourth method can be based on the imaging position. Flexible light focusing, but this method requires tw...

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  • Double-channel full-range complex-spectral-domain optical coherence tomographic system
  • Double-channel full-range complex-spectral-domain optical coherence tomographic system
  • Double-channel full-range complex-spectral-domain optical coherence tomographic system

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Embodiment Construction

[0015] Depend on figure 1 As shown, a dual-channel full-range complex frequency-domain optical coherence tomography system is characterized in that the system includes a set of light source 1, a set of spectrometer 8, a short reference arm 4, a long reference arm 6, and a sample arm 5 , a 3 3 fiber optic coupler 3 and computer 9, the 3 3 The fiber optic coupler has three input ports, one of which is used as the input port of the light source 1, connected to the light source 1 through the isolator 2, and the other input port is connected to the spectrometer 8 through the first lens 7, and used as the coupling of the spectrometer 8 to obtain the reference The interference spectra returned by arms 4, 6 and sample arm 5, the third port is not used; 3 3 The optical fiber coupler 3 is provided with three output ports, one output port is connected to the sample arm 5, and the other two output ports are respectively connected to the short reference arm 4 and the long reference ar...

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Abstract

The invention discloses a double-channel full-range complex-spectral-domain optical coherence tomographic system. A 3X3 fiber coupler splits light to form two reference arms and a sample arm. By using the spectral-domain optical coherence tomographic system composed of the two reference arms and the sample arm to detect samples at different depth, detection depth can be increased and imaging quality can be improved. The optical coherence tomographic system can be used for vividly imaging the deep samples by the aid of one light source and one spectrometer. The double-channel full-range complex-spectral-domain optical coherence tomographic system has potential application value for detecting high-scattering biological tissues and industrial samples.

Description

technical field [0001] The present invention relates to a complex frequency domain optical coherence tomography system, in particular to a 3-based The invention discloses a dual-channel frequency-domain optical coherence tomography system of 3 fiber couplers, belonging to the field of optical imaging. Background technique [0002] Frequency-domain optical coherence tomography is a tomographic imaging technique that can provide high resolution, high sensitivity, non-contact, and non-destructive. The detection depth of this technology has always been limited: the Fourier transform of the interference spectrum in image processing has Hamiltonian symmetry, and the image of the reconstructed sample is symmetrical with respect to the equal optical path difference between the reference arm and the sample. In order to avoid the interaction between the real image and the conjugate image Overlapping, only half of the complex space is used for imaging; in addition, the detection dept...

Claims

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Application Information

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IPC IPC(8): A61B3/14G01N21/45
Inventor 戴翠霞林晓艳王竑吴文娟潘瑞芹张灿云
Owner SHANGHAI INST OF TECH
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