Spectrum frequency domain coherence tomography system

Abstract

The invention discloses a sub-spectrum frequency-domain coherence tomography system. An adjustable filter is used to filter the light wave output by a wide-spectrum light source into several sub-spectra with narrower bandwidths, which are sequentially input into a frequency-domain optical coherence tomography system. The interferometer, and sequentially detect the corresponding spectral interference signals; through data post-processing, the phase alignment of the spectral interference signals is integrated into a synthetic interference signal, and the Fourier transform can obtain higher resolution and higher resolution of objects at different depths. Signal-to-noise ratio of the sample tomogram. Since the spectral output irradiates the sample with a lower light intensity, the imaging system can avoid sample damage or discomfort to the sample, and at the same time, it can synthesize several lower light intensity original signals into a high signal-to-noise ratio image through subsequent data processing , so as to improve the performance of spectral domain optical coherence tomography, which is easy for clinical transformation and application.

Description

technical field

[0001] The invention relates to the field of optical imaging, in particular to a spectral frequency-domain coherence tomography system. Background technique

[0002] Optical coherence tomography (OCT) is a tomographic imaging technology based on the principle of optical interference. It uses the interference of the reference arm light and the sample arm light to detect the reflection or scattering signals of light at different depths of the sample, so as to obtain the tomographic structure of the sample. information. OCT has been widely used clinically in the fields of ophthalmology and cardiovascular diagnosis, especially has become the gold standard for the diagnosis of ophthalmic diseases. The current mainstream OCT system is based on the Fourier domain OCT (FourierDomain OCT, FDOCT) imaging principle. FDOCT is mainly divided into two types, one is spectral domain (ie, frequency domain) OCT technology (Spectral-Domain OCT, SDOCT), that is, at the detecti...

Examples

Embodiment Construction

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, the split-spectrum frequency-domain coherence tomography system 50 proposed by the present invention mainly includes a wide-spectrum light source 1, an adjustable filter 21, a beam splitter 3, a polarization adjuster 4, a lens 5, a reference arm plane mirror 6, and a sample arm scanning oscillator. mirror 9, the grating 7 of the spectrometer part, the line scan camera 8 and other core components. The imaging principle of the spectral frequency-domain coherence tomography system is that after the light wave generated by the wide-spectrum light source 1 is output from the tunable filter 21, after being split by the beam splitter, all the light leads to the reference arm, and after being collimated by the lens 5 Reflected by the plane mirror 6 of the reference arm; the other li...

technical field

[0001] The invention relates to the field of optical imaging, in particular to a spectral frequency-domain coherence tomography system. Background technique

[0002] Optical coherence tomography (OCT) is a tomographic imaging technology based on the principle of optical interference. It uses the interference of the reference arm light and the sample arm light to detect the reflection or scattering signals of light at different depths of the sample, so as to obtain the tomographic structure of the sample. information. OCT has been widely used clinically in the fields of ophthalmology and cardiovascular diagnosis, especially has become the gold standard for the diagnosis of ophthalmic diseases. The current mainstream OCT system is based on the Fourier domain OCT (FourierDomain OCT, FDOCT) imaging principle. FDOCT is mainly divided into two types, one is spectral domain (ie, frequency domain) OCT technology (Spectral-Domain OCT, SDOCT), that is, at the detecti...

Examples

Embodiment Construction

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, the split-spectrum frequency-domain coherence tomography system 50 proposed by the present invention mainly includes a wide-spectrum light source 1, an adjustable filter 21, a beam splitter 3, a polarization adjuster 4, a lens 5, a reference arm plane mirror 6, and a sample arm scanning oscillator. mirror 9, the grating 7 of the spectrometer part, the line scan camera 8 and other core components. The imaging principle of the spectral frequency-domain coherence tomography system is that after the light wave generated by the wide-spectrum light source 1 is output from the tunable filter 21, after being split by the beam splitter, all the light leads to the reference arm, and after being collimated by the lens 5 Reflected by the plane mirror 6 of the reference arm; the other li...

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