CN104688188A - Spectral optical coherence imaging system based on optic computation - Google Patents
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/255—Details, e.g. use of specially adapted sources, lighting or optical systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
Abstract
The invention relates to the spectral optical coherence imaging system based on optic computation. The spectral optical coherence imaging system based on the optic computation is characterized by comprising an optic computation system and an image display system, wherein the optic computation system comprises a broadband light source, a signal generating device, a light intensity modulator, a chromatic dispersion device, a first coupler, a first circulator, a second circulator, a first focusing lens, a second focusing lens, a reflector, a scanning galvanometer and a second coupler, and the image display system comprises a balance detector, an envelope detector, a data acquisition card and a computer. The spectral optical coherence imaging system based on the optic computation realizes the real-time Fourier transform of the light frequency domain signals. Since the real-time Fourier transform can timely process the image data of the spectral optical coherence imaging system, the imaging speed is extremely high, and the spectral optical coherence imaging system based on the optic computation can be widely applied to the spectral optical coherence imaging.
Description
Technical field
The present invention relates to a kind of spectroscopic optics coherence imaging system (Spectral Domain Optical CoherenceTomograpgy, be called for short SD-OCT), particularly about a kind of spectroscopic optics coherence imaging system based on optical oomputing, belong to Biomedical Photonics field.
Background technology
Optical coherence tomography (Optical Coherence Tomograpgy, be called for short OCT), at present by traditional Time Domain Optical coherent tomographic (Time Domain-OCT, be called for short TD-OCT) develop into domain optical coherence chromatography (Fourier Domain-OCT is called for short FD-OCT).Wherein, FD-OCT has two types: based on the spectroscopic optical coherence tomography (SpectralDomain-OCT of the spectrometer detection formula of CCD (Charge-coupled Device), be called for short SD-OCT) and based on the frequency sweep optical coherence tomography (Swept Source-OCT, be called for short SS-OCT) of frequency swept laser.Compare with traditional TD-OCT, SD-OCT no longer relies on the mechanical scanning of optical delay line to obtain a line (A-scan) signal of biological tissue's depth direction, but carry out spectrum analysis by spectrogrph, once obtain a line signal, so just, avoid the shortcoming of the low-response caused because of motional inertia, and the performance in system signal noise ratio etc. have also been obtained raising.
In existing SD-OCT, CCD measure be the interference signal of sample light and reference light frequency spectrum launch, the spatial information being equivalent to sample has been done a Fourier transform.Therefore, the every line frequency spectrum data obtained from CCD is the function of wavelength X, needs the function these data being converted to wave vector k then to try again inverse fourier transform, thus obtains the structural information in a line sample depth direction.At present, line sweep speed is very ripe in the linear CCD technology of tens kHz, but if will be used for developing high-resolution three-dimensional realtime imaging SD-OCT, the scanning speed of existing line array CCD just seems awkward.In addition, in image real time transfer process, the operand of spline interpolation (frequency spectrum data being forwarded to the process of wave vector k-space from wavelength X space) and inverse Fourier transform is for central processing unit (the Central Processing Unit of active computer, be called for short CPU) or graphic process unit (Graphic Processing Unit, be called for short GPU) too huge, cause being difficult to realize high-resolution three-dimension realtime imaging.Therefore, the bottleneck of SD-OCT image taking speed is exactly the speed of ccd data picking rate and image real time transfer.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of spectroscopic optics coherence imaging system based on optical oomputing that effectively can improve image taking speed.
For achieving the above object, the present invention takes following technical scheme: a kind of spectroscopic optics coherence imaging system based on optical oomputing, it is characterized in that: comprise an optical computing system and an image display system, described optical computing system comprises wideband light source, signal generation apparatus, light intensity modulator, Dispersive Devices, the first bonder, the first circulator, the second circulator, the first condenser lens, the second condenser lens, reflecting mirror, d scanning system and the second bonder; Described image display system comprises balanced detector, envelope detector, data collecting card and computer, and wherein, the coupled ratio parameter of described second bonder is 50/50; The direct current broadband light that described wideband light source sends is sent to described Dispersive Devices after the described light intensity modulator modulation driven by described signal generation apparatus, light through described Dispersive Devices outgoing enters described first bonder and carries out light splitting according to setup parameter, fraction light through described first bonder outgoing enters described first circulator becomes reference light, and all the other most of light enter described second circulator becomes sample light; Return along original optical path after reference light is transmitted into described reflecting mirror after described first condenser lens is assembled and enter described first circulator; Described d scanning system is for carrying out the scanning of X and Y-direction, and sample light is transmitted into the diverse location of testing sample through described d scanning system, and the light of the different depth reflection of testing sample diverse location returns along original optical path and enters described second circulator; The reference light through reflecting mirror reflection of described first circulator outgoing and the sample light through testing sample reflection of described second circulator outgoing are all transmitted into described second bonder and are coupled, light in proportion through described second bonder outgoing receives through described balanced detector, optical signal carries out processing and the signal of telecommunication obtained is sent to described envelope monitor and obtains envelope signal by described balanced detector, envelope signal is input to described computer through described data collecting card and shows, and obtains the structural information of testing sample.
Described wideband light source, light intensity modulator, light path any position between Dispersive Devices and the first bonder arrange a boosting optical amplifier or a doped optical fibre amplifier; Or between described second bonder and described balanced detector, described boosting optical amplifier or doped optical fibre amplifier are set.
Described Dispersive Devices adopts the 3rd circulator and Fiber Bragg Grating FBG, when described Dispersive Devices adopts the 3rd circulator and Fiber Bragg Grating FBG, broadband light after described light intensity modulator modulation is sent to described 3rd circulator, and the broadband light through described 3rd circulator outgoing is entered described first bonder by described Fiber Bragg Grating FBG reflection through described 3rd circulator and is coupled.
Described Dispersive Devices adopts optical fiber, and when described Dispersive Devices adopts optical fiber, the broadband light after described light intensity modulator modulation is coupled to described first bonder through fibre optical transmission.
Described signal generation apparatus adopts waveform generator, arranges a radio frequency amplifier between described waveform generator and described light intensity modulator; Described waveform generator and radio frequency amplifier are modulated to cos (at for the direct current broadband light driving described light intensity modulator and exported by described wideband light source in time domain
2)+1 shape, a is constant.
Described light intensity modulator adopts electro-optic intensity modulator or acousto-optic intensity modulator.
The service band of the output wavelength of described wideband light source is the one in 850nm, 1064nm, 1310nm and 1550nm.
The present invention is owing to taking above technical scheme, have the following advantages: 1, be different from traditional SD-OCT, the present invention is owing to employing the method for novel optical real time fourier processing, make SD-OCT need not re-use grating, CCD carries out spectra collection, also without the need to using high-performance computer to carry out batten difference and discrete Fourier transform, therefore broken away from the short not and fast not restriction to SD-OCT image taking speed of operational speed of a computer CCD time of integration, system imaging speed can have been improved widely.2, based on the SD-OCT of optics real time fourier processing system from wideband light source to balanced detector, whole light path not only structure is simple, and all can adopt all-fiber devices, makes the capacity usage ratio of system, stability, integrated level higher.3, the present invention is owing to being provided with the second bonder, and the light in proportion through the second bonder outgoing receives through balanced detector, and direct current signal wherein and common-mode noise are all balanced detector and remove, and effectively improve signal to noise ratio.In sum, because real time fourier processing can process the view data of spectroscopic optics coherence imaging system in time, so image taking speed of the present invention is exceedingly fast.In addition, the present invention has that structure is simple, all-fiber, steady operation and other merits, can be widely used in spectroscopic optics coherent imaging.
Accompanying drawing explanation
Fig. 1 is spectroscopic optics coherence imaging system structural representation of the present invention;
When Fig. 2 is for adopting minute surface as sample, the output signal schematic diagram of the balanced detector that Theoretical Calculation obtains;
When Fig. 3 is for adopting minute surface as sample, test the output signal schematic diagram of the balanced detector recorded.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description is carried out to the present invention.But should be appreciated that being provided only of accompanying drawing understands the present invention better, they not should be understood to limitation of the present invention.In describing the invention, it is to be appreciated that term " first ", " second " etc. are only used for the object described, and instruction or hint relative importance can not be interpreted as.
Suppose that the optical signal (such as: a light pulse) of a finite length (only has 2nd order chromatic dispersion by the desirable dispersive medium that a dispersion measure is enough large, and second order dispersion coefficient is not with wavelength change), because the light of different wave length exists speed difference in dispersive medium, the time-domain shape of output light is approximately the spectral shape on its frequency domain.As everyone knows, the spectral shape on the time-domain shape of optical signal and frequency domain is the relation of Fourier transformation, and therefore, dispersive medium is just equivalent to do Fourier transformation to this optical signal.
Obviously, dispersive medium is linear system, and the characteristic of linear system is described by its impulse Response Function, the equation according to about dispersion:
If the optical signal of known input is an impulse function δ, impulse Response Function h (t) ∝ the exp (-it obtained
2/ (2D)).Wherein, t is the time, and A (z, t) is for optical signal is in the time domain waveform at the z place of dispersive medium, and β is second order dispersion coefficient, and exp is e index, if dispersive medium length is z
0, its dispersion measure D=z
0β.
To arbitrary optical signal f (t), inputted the desirable dispersive medium that a dispersion measure is enough large, output waveform (its approximate Fourier transformation result) is | f (t) * h (t) |, * is convolution, || for asking modular arithmetic.This mathematical form also can be written as | f (t) * h (t) | and ∝ | f (t) * exp (-it
2/ (2D)) |=((f (t) * cos (t
2/ (2D)))
2+ (f (t) * sin (t
2/ (2D)))
2)
1/2.In fact, than f (t), cos (t
2/ (2D)) and sin (t
2/ (2D)) be all change the function be exceedingly fast, again because (cos (t
2/ (2D)))
2+ (sin (t
2/ (2D)))
2=1, therefore | f (t) * h (t) | reality is just proportional to f (t) * cos (t
2/ (2D)) or f (t) * sin (t
2/ (2D)) envelope, this point can be verified by numerical computations.
In sum, the Fourier transformation of certain function f (t) can be approximated to be its function cos (at
2) the envelope of convolution algorithm result, that is: f (t) * cos (at
2) envelope.Wherein, a is a constant.
In addition, from the characteristic of dispersive medium, dispersive medium can realize the convolution between time-domain signal and its frequency spectrum.Mathematic(al) representation is:
I
out(t)∝I
in(t)*S(ω＝t/D
0)
Wherein, I
in(t) and I
outt () is respectively the light signal strength of input and output dispersive medium, the frequency spectrum that S (ω) is input signal, and ω is angular frequency, D
0for the dispersion measure of dispersive medium.S (ω=t/D
0) represent ω=t/D
0substitute into the function about time t that S (ω) expression formula obtains.In order to the frequency spectrum S (ω) of the interference signal to SD-OCT does real time fourier processing, by the intensity modulated of input light be:
I
in(t)∝cos(at
2)+1
Consider that light intensity can not be negative, so add constant term 1 in above formula.If it is D that the optical signal after modulation is injected into dispersion measure
0dispersive medium, just can realize time-domain signal I
inthe convolution algorithm of (t) and its frequency spectrum S (ω), output intensity I
out(t) be:
I
out(t)∝cos(at
2)*S(ω＝t/D
0)+1*S(ω＝t/D
0)
Wherein, 1*S (ω=t/D
0) be DC quantity.And cos (at
2) * S (ω=t/D
0) be exactly cos (at
2) with the convolution of SD-OCT interference spectrum shape.Its envelope is exactly a space of lines structural information of institute's test sample product, so just achieves and does real time fourier processing to the frequency spectrum of the interference signal of SD-OCT.Herein, the spectrum S (ω) of SD-OCT interference signal is function about ω but not about the function of λ, so in fact just completed the process frequency spectrum of SD-OCT interference signal being forwarded to wave vector k-space from wavelength X space before doing real time fourier processing.
Be not difficult to find, adopt light path to realize such convolution algorithm, be also just equivalent to construct an equivalent dispersive medium, utilize this equivalent dispersive medium to do approximate Fourier transformation to signal.Obviously, the pass of equivalence dispersive medium dispersion measure D and a is a=1/ (2D), wherein, a chooses according to practical application, first can do with Matlab the numerical operation that Convolution sums gets envelope during use, and operation result is judged, if result meets default Fourier transformation, then think that now choosing of a is suitable.
Based on above-mentioned principle, as shown in Figure 1, the spectroscopic optics coherence imaging system that the present invention is based on optical oomputing comprises an optical computing system and an image display system, and optical computing system comprises wideband light source 1, signal generation apparatus 2, light intensity modulator 3, Dispersive Devices 4, first bonder 5, first circulator 6, second circulator 7, first condenser lens 8, second condenser lens 9, reflecting mirror 10, d scanning system 11 and the second bonder 12; Image display system comprises balanced detector 13, envelope detector 14, data collecting card 15 and computer 16, and wherein, the coupled ratio parameter of the second bonder 12 is 50/50.Dispersive Devices 4 is sent to after the light intensity modulator 3 of the direct current broadband light that wideband light source 1 sends through being driven by signal generation apparatus 2 is modulated to required form, light through Dispersive Devices 4 outgoing enters the first bonder 5 and carries out light splitting according to setup parameter, fraction light through the first bonder 5 outgoing enters the first circulator 6 becomes reference light, and all the other most of light enter the second circulator 7 becomes sample light; Return along original optical path after reference light is transmitted into reflecting mirror 10 after the first condenser lens 8 is assembled and enter the first circulator 6; D scanning system 11 is for carrying out the scanning of X and Y-direction, and sample light is transmitted into the diverse location of testing sample 17 through d scanning system 11, and the light of the different depth reflection of testing sample 17 diverse location returns along original optical path and enters the second circulator 7; The reference light through reflecting mirror 10 reflection of the first circulator 6 outgoing and the sample light through testing sample 17 reflection of the second circulator 7 outgoing are all transmitted into the second bonder 12 and are coupled, light in proportion through the second bonder 12 outgoing receives through balanced detector 13, optical signal carries out processing and the signal of telecommunication obtained is sent to envelope monitor 14 and obtains envelope signal by balanced detector 13, envelope signal is input to computer 16 through data collecting card 15 and shows, and obtains the structural information of testing sample 17.
In a preferred embodiment, in order to improve the power of output signal, wideband light source 1, light intensity modulator 3, light path any position between Dispersive Devices 4 and the first bonder 5 can arrange a boosting optical amplifier or a doped optical fibre amplifier for amplifying signal, or can arrange boosting optical amplifier or doped optical fibre amplifier between the second bonder 12 and balanced detector 13.
In a preferred embodiment, as shown in Figure 1, Dispersive Devices 4 can adopt the 3rd circulator 41 and Fiber Bragg Grating FBG 42 (linear chirp optical fiber grating), when Dispersive Devices 4 adopts the 3rd circulator 41 and Fiber Bragg Grating FBG 42, broadband light after light intensity modulator 3 is modulated is sent to the 3rd circulator 41, to be reflected enter the first bonder 5 through the 3rd circulator 41 and be coupled through the broadband light of the 3rd circulator 41 outgoing by Fiber Bragg Grating FBG 42.In addition, Dispersive Devices 4 can also adopt the optical fiber equal with Fiber Bragg Grating FBG 42 dispersion measure, and when Dispersive Devices 4 adopts optical fiber, the broadband light after light intensity modulator 3 is modulated is coupled to the first bonder 5 through fibre optical transmission.
In a preferred embodiment, the output wavelength of wideband light source 1 can select service band according to actual needs, and service band can be 850nm, 1064nm, 1310nm and 1550nm, but is not limited thereto; Correspondingly, the operation wavelength of the respective optical device in light path and the output wavelength selected by wideband light source 1 adapt.
In a preferred embodiment, as shown in Figure 1, signal generation apparatus 2 can adopt waveform generator 21, half-wave voltage due to existing light intensity modulator is significantly greater than the amplitude of waveform generator 21 output voltage, therefore can arrange radio frequency amplifier 22 between waveform generator 21 and light intensity modulator 3 for improving modulation depth; Waveform generator 21 and radio frequency amplifier 22 are modulated to cos (at for the direct current broadband light driving light intensity modulator 3 and exported by wideband light source 1 in time domain
2)+1 shape.
In a preferred embodiment, light intensity modulator 3 can adopt electro-optic intensity modulator or acousto-optic intensity modulator.
In a preferred embodiment, d scanning system 11 is existing system, and comprise two scanning galvanometers of X-direction and Y-direction, specific works principle does not repeat them here.
As shown in Figures 2 and 3, when using minute surface as sample time, balanced detector 13 output signal the calculated results consistent with experimental result, therefore prove that the principle of the spectroscopic optics coherence imaging system based on optical oomputing of the present invention is correctly feasible.
Be described in detail below by the use procedure of specific embodiment to the spectroscopic optics coherence imaging system based on optical oomputing of the present invention.Wherein, the service band of the present embodiment middle width strip light source 1 is 1550nm, and light intensity modulator 3 adopts electro-optic intensity modulator, and Dispersive Devices 4 adopts the coupling parameter of the 3rd circulator 41 and Fiber Bragg Grating FBG 42, first bonder to be 10/90, and detailed process is:
As shown in Figure 1, service band is, after direct current broadband light that the wideband light source 1 of 1550nm sends is sent to the electro-optic intensity modulator driven by waveform generator 21 and radio frequency amplifier 22, time domain is modulated to the shape cos (at of the impulse Response Function h (t) of equivalent dispersive medium
2)+1.Light after electro-optic intensity modulator modulation enters the first bonder 5 through the 3rd circulator 41 be again coupled according to selected coupling parameter by being reflected by Fiber Bragg Grating FBG 42 after the 3rd circulator 41, after the first bonder 5 is coupled, the light of 10% enters the first circulator 6 becomes reference light, and the light of 90% enters the second circulator 7 becomes sample light.Reference light is transmitted into reflecting mirror 10 after the first condenser lens 8 is assembled, the reference light reflected through reflecting mirror 10 to return along original optical path and enters the first circulator 6, sample light is transmitted on testing sample 17 through d scanning system 11 after the second condenser lens 9 is assembled, d scanning system 11 is for carrying out the scanning of X and Y-direction, and the sample light that the different depth through the diverse location of testing sample 17 reflects returns along original optical path and enters the second circulator 7; The reference light through reflecting mirror 10 reflection of the first circulator 6 outgoing and the sample light through testing sample reflection of the second circulator 7 outgoing are coupled through the second bonder 12 that the coefficient of coup is 50/50, light in proportion through the second bonder 12 outgoing is balanced detector 13 and receives optical signal is converted into the signal of telecommunication, direct current signal wherein and common-mode noise are all balanced detector 13 and remove, the signal of telecommunication that balanced detector 13 exports obtains its envelope signal by envelope detector 14, and this envelope signal is exactly cos (at
2) with the envelope of the convolution results of the reference light that returns and sample interference of light frequency spectrum, i.e. the structural information of sample.Finally, the signal of telecommunication converts digital signal to via data collecting card 15, is input to computer 16 and carries out three-dimensional rendering and display, obtains the three-dimensional distribution map of sample.
The various embodiments described above are only for illustration of the present invention; wherein all optics can adopt outside support to be fixed according to practical situation; in this no limit; the structure etc. of each parts all can change to some extent; as long as meet paths condition; every equivalents of carrying out on the basis of technical solution of the present invention and improvement, all should not get rid of outside protection scope of the present invention.
Claims (7)
1. the spectroscopic optics coherence imaging system based on optical oomputing, it is characterized in that: comprise an optical computing system and an image display system, described optical computing system comprises wideband light source, signal generation apparatus, light intensity modulator, Dispersive Devices, the first bonder, the first circulator, the second circulator, the first condenser lens, the second condenser lens, reflecting mirror, d scanning system and the second bonder; Described image display system comprises balanced detector, envelope detector, data collecting card and computer, and wherein, the coupled ratio parameter of described second bonder is 50/50;
The direct current broadband light that described wideband light source sends is sent to described Dispersive Devices after the described light intensity modulator modulation driven by described signal generation apparatus, light through described Dispersive Devices outgoing enters described first bonder and carries out light splitting according to setup parameter, fraction light through described first bonder outgoing enters described first circulator becomes reference light, and all the other most of light enter described second circulator becomes sample light; Return along original optical path after reference light is transmitted into described reflecting mirror after described first condenser lens is assembled and enter described first circulator; Described d scanning system is for carrying out the scanning of X and Y-direction, and sample light is transmitted into the diverse location of testing sample through described d scanning system, and the light of the different depth reflection of testing sample diverse location returns along original optical path and enters described second circulator; The reference light through reflecting mirror reflection of described first circulator outgoing and the sample light through testing sample reflection of described second circulator outgoing are all transmitted into described second bonder and are coupled, light in proportion through described second bonder outgoing receives through described balanced detector, optical signal carries out processing and the signal of telecommunication obtained is sent to described envelope monitor and obtains envelope signal by described balanced detector, envelope signal is input to described computer through described data collecting card and shows, and obtains the structural information of testing sample.
2. a kind of spectroscopic optics coherence imaging system based on optical oomputing as claimed in claim 1, is characterized in that: described wideband light source, light intensity modulator, light path any position between Dispersive Devices and the first bonder arrange a boosting optical amplifier or a doped optical fibre amplifier; Or between described second bonder and described balanced detector, described boosting optical amplifier or doped optical fibre amplifier are set.
3. a kind of spectroscopic optics coherence imaging system based on optical oomputing as claimed in claim 1 or 2, it is characterized in that: described Dispersive Devices adopts the 3rd circulator and Fiber Bragg Grating FBG, when described Dispersive Devices adopts the 3rd circulator and Fiber Bragg Grating FBG, broadband light after described light intensity modulator modulation is sent to described 3rd circulator, and the broadband light through described 3rd circulator outgoing is entered described first bonder by described Fiber Bragg Grating FBG reflection through described 3rd circulator and is coupled.
4. a kind of spectroscopic optics coherence imaging system based on optical oomputing as claimed in claim 1 or 2, it is characterized in that: described Dispersive Devices adopts optical fiber, when described Dispersive Devices adopts optical fiber, the broadband light after described light intensity modulator modulation is coupled to described first bonder through fibre optical transmission.
5. a kind of spectroscopic optics coherence imaging system based on optical oomputing as described in any one of Claims 1 to 4, it is characterized in that: described signal generation apparatus adopts waveform generator, arranges a radio frequency amplifier between described waveform generator and described light intensity modulator; Described waveform generator and radio frequency amplifier are modulated to cos (at for the direct current broadband light driving described light intensity modulator and exported by described wideband light source in time domain
2)+1 shape, a is constant.
6. a kind of spectroscopic optics coherence imaging system based on optical oomputing as described in any one of Claims 1 to 5, is characterized in that: described light intensity modulator adopts electro-optic intensity modulator or acousto-optic intensity modulator.
7. a kind of spectroscopic optics coherence imaging system based on optical oomputing as described in any one of claim 1 ~ 6, is characterized in that: the service band of the output wavelength of described wideband light source is the one in 850nm, 1064nm, 1310nm and 1550nm.
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| CN105105717A (en) * | 2015-09-15 | 2015-12-02 | 中国科学院光电技术研究所 | Endoscopic OCT imaging system adopting optical path difference external compensation common-path interference probe |
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| CN113984715A (en) * | 2021-10-28 | 2022-01-28 | 上海盛晃光学技术有限公司 | Coherence tomography device and method |
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