CN105445188A - High-speed optical tomography scanning device and method based on elasto-optical modulation - Google Patents
High-speed optical tomography scanning device and method based on elasto-optical modulation Download PDFInfo
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- CN105445188A CN105445188A CN201510796552.2A CN201510796552A CN105445188A CN 105445188 A CN105445188 A CN 105445188A CN 201510796552 A CN201510796552 A CN 201510796552A CN 105445188 A CN105445188 A CN 105445188A
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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
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Abstract
The invention relates to the technical field of optical coherence detection, in particular relates to a high-speed optical tomography scanning device and method based on elasto-optical modulation. The scanning speed can reach 50kHz; the high-speed optical tomography scanning device comprises a low-coherence light source, an optical splitter, an elasto-optical modulator and a prober, wherein the low-coherence light source, the optical splitter and a sample to be detected are positioned on a same light path; the elasto-optical modulator, the optical splitter and the prober are position on a same light path; the two light paths are mutually orthogonal, so that elasto-optical modulator can be used for modulating infrared light through the elasto-optical effect generated in a way that piezoelectric quartz is adopted for driving a zinc selenide crystal; a light pass surface at one side of the zinc selenide crystal in the elasto-optical modulator is plated with a gold film to reach the reflex action on light; when the optical path differences between probe light reflected by the sample to be detected and modulating light modulated by the elasto-optical modulator are equal, the reflectivity at the corresponding layer in the sample can be probed. The device and the method can be used for real-time optical tomography scanning for infrared transparent tissues and organs such as skin and eyes.
Description
Technical field
The present invention relates to optical coherence detection technique field, more specifically, relating to a kind of high speed optical computed tomography scanning device and method based on playing optical modulation.
Background technology
Optical chromatography scanning is a kind of optical coherence Detection Techniques, is widely used in medical field.Compared to traditional medicine Detection Techniques, optical chromatography scanning has the advantages such as resolution is high, image taking speed is fast, radiationless injury, is one of important tool of medical research and clinical diagnosis, as the inspection to the infrared light transparent such as skin, eyes Organ and tissue.Time Domain Optical computed tomography scanning equipment in existing optical chromatography scanning is generally Michelson structure, reached by the index glass scanning in Michelson structure and the modulation of light is scanned to complete optical chromatography, but finite rate, the shock resistance of index glass movement in this structure are poor, cause the sweep velocity of this structure lower, be not suitable at a high speed, detect in real time.
Summary of the invention
In order to overcome deficiency existing in prior art, can improve the sweep velocity of optical chromatography scanning technique, the invention provides a kind of high speed optical computed tomography scanning device and method based on playing optical modulation, its sweep velocity can reach 50kHz.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of high speed optical computed tomography scanning device based on playing optical modulation, comprise low-coherence light source, optical splitter, bullet photomodulator and detector, described low-coherence light source and optical splitter and testing sample are positioned in same light path, described bullet photomodulator, optical splitter and detector are positioned in same light path, and above-mentioned two light paths are mutually orthogonal.
The modulating speed of described bullet photomodulator can reach 50kHz.
Described bullet photomodulator comprises zinc selenide crystal and piezoelectric quartz, and described piezoelectric quartz driving zinc selenide crystal vibration generation elasto-optical effect reaches the modulating action to infrared light.
The logical light face of described zinc selenide crystal side is coated with golden film, for reflects infrared light.
Based on the high speed optical computed tomography scanning method playing optical modulation, the infrared acquisition light that low-coherence light source sends is divided into two bundles through optical splitter, and a branch of detection light incides bullet photomodulator, through playing light modulator modulates back reflection, is light modulated; Another bundle detection light incides testing sample, and detection light is the continuous retroeflection of meeting in testing sample transmitting procedure, is detection light; Light modulated and detection light co-incident are on detector, and when light modulated is equal with the optical path difference of detection light, the reflection strength of testing sample respective depth will be detected device and obtain; Play photomodulator by modulation, the reflectivity in each degree of depth of testing sample can be drawn, complete high speed computed tomography scanning.
The beneficial effect that compared with prior art the present invention has is:
The present invention uses and plays photomodulator as the modulation device in optical chromatography Scan Architecture, and its modulating speed can reach 50kHz, and sweep velocity is high, is applicable at a high speed, detects in real time; The present invention is based on the optical chromatography Scan Architecture movement-less part playing photomodulator, Stability Analysis of Structures, has stronger shock resistance.
Accompanying drawing explanation
Below by accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is structural representation of the present invention;
Fig. 2 is that the present invention is hit by a bullet the structural representation of photomodulator;
Fig. 3 is the corresponding relation figure of optical chromatography sweep signal of the present invention and the testing sample degree of depth.
In figure: 1 be low-coherence light source, 2 being optical splitter, 3 being testing sample for playing photomodulator, 4,5 be detector, 6 be sweep signal, 7 be zinc selenide crystal, 8 be piezoelectric quartz, 9 for golden film.
Embodiment
The invention will be further described by reference to the accompanying drawings for embodiment below.
As shown in Figure 1, mainly comprise low-coherence light source 1, optical splitter 2 based on the structure playing optical modulation high speed optical computed tomography scanning, play photomodulator 3, detector 5 etc.Low-coherence light source 1, optical splitter 2 and testing sample 4 are in same light path, and play photomodulator 3, optical splitter 2 and detector and be in same light path, above two light paths are orthogonal.The infrared acquisition light that low relevant source 1 sends is divided into two bundles through optical splitter 2 and incides bullet photomodulator 3 respectively with testing sample 4.Wherein Ray Of Light modulates back reflection through playing photomodulator 3, and the continuous retroeflection of meeting in testing sample 4 transmitting procedure of another road detection light, reflected light is through optical splitter 2 and modulate light co-incident on detector 5.When light modulated is equal with the optical path difference of detection light, the reflection strength of testing sample 4 respective depth will be detected device 5 and obtain.Like this, by playing the modulation of photomodulator 3 pairs of light, its modulating speed can reach 50kHz, can draw the reflectivity in each degree of depth of sample, reaches high speed chromatography scan action.
As shown in Figure 2, playing photomodulator 3 is modulating actions that the elasto-optical effect utilizing piezoelectric quartz 8 to drive zinc selenide crystal 7 to vibrate generation reaches to light, and a logical light face of zinc selenide crystal 7 is coated with golden film 9, for reflects infrared light.
As shown in Figure 3, play in photomodulator 3 course of work and constantly change light path, light modulated produces with detection light and superposes on detector 5, because the coherent length Δ h of the low-coherence light source 1 adopted in high speed optical computed tomography scanning technology is limited, make to only have in testing sample 4 in the thickness of Δ h and just can interfere with light modulated, like this, in sweep signal 6, every Δ t interval and the every Δ h thickness of testing sample 4 create corresponding relation.
Claims (5)
1. the high speed optical computed tomography scanning device based on bullet optical modulation, it is characterized in that: comprise low-coherence light source (1), optical splitter (2), play photomodulator (3) and detector (5), described low-coherence light source (1) and optical splitter (2) and testing sample (4) are positioned in same light path, described bullet photomodulator (3), optical splitter (2) and detector (5) are positioned in same light path, and above-mentioned two light paths are mutually orthogonal.
2. a kind of high speed optical computed tomography scanning device based on playing optical modulation according to claim 1, is characterized in that: the modulating speed of described bullet photomodulator (3) can reach 50kHz.
3. a kind of high speed optical computed tomography scanning device based on playing optical modulation according to claim 1, it is characterized in that: described bullet photomodulator (3) comprises zinc selenide crystal (7) and piezoelectric quartz (8), described piezoelectric quartz (8) driving zinc selenide crystal (7) vibration generation elasto-optical effect reaches the modulating action to infrared light.
4. a kind of high speed optical computed tomography scanning device based on playing optical modulation according to claim 3, is characterized in that: the logical light face of described zinc selenide crystal (7) side is coated with golden film (9).
5. the high speed optical computed tomography scanning method based on bullet optical modulation, it is characterized in that: the infrared acquisition light that low-coherence light source (1) sends is divided into two bundles through optical splitter (2), a branch of detection light incides and plays photomodulator (3), through playing photomodulator (3) modulation back reflection, is light modulated; Another bundle detection light incides testing sample (4), and detection light is the continuous retroeflection of meeting in testing sample (4) transmitting procedure, is detection light; Light modulated and detection light co-incident are on detector (5), and when light modulated is equal with the optical path difference of detection light, the reflection strength of testing sample (4) respective depth will be detected device (5) and obtain; Play photomodulator (3) by modulation, the reflectivity in testing sample (4) each degree of depth can be drawn, complete high speed computed tomography scanning.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510796552.2A CN105445188A (en) | 2015-11-18 | 2015-11-18 | High-speed optical tomography scanning device and method based on elasto-optical modulation |
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| CN201510796552.2A CN105445188A (en) | 2015-11-18 | 2015-11-18 | High-speed optical tomography scanning device and method based on elasto-optical modulation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109613706A (en) * | 2019-01-28 | 2019-04-12 | 京东方科技集团股份有限公司 | For the method for adjustment, equipment and storage medium of intelligent helmet |
Citations (1)
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|---|---|---|---|---|
| US20080013093A1 (en) * | 2006-07-17 | 2008-01-17 | Bioptigen, Inc. | Methods, Systems and Computer Program Products for Removing Undesired Artifacts in Fourier Domain Optical Coherence Tomography (FDOCT) Systems Using Continuous Phase Modulation and Related Phase Modulators |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080013093A1 (en) * | 2006-07-17 | 2008-01-17 | Bioptigen, Inc. | Methods, Systems and Computer Program Products for Removing Undesired Artifacts in Fourier Domain Optical Coherence Tomography (FDOCT) Systems Using Continuous Phase Modulation and Related Phase Modulators |
Non-Patent Citations (3)
| Title |
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| ARNAUD DUBOIS,ET AL: "High-resolution full-field optical coherence tomography with a Linnik microscope", 《APPLIED OPTICS》 * |
| WOLFGANG DREXLER，JAMES G. FUJIMOTO: "《Optical Coherence Tomography: Technology and Applications》", 31 December 2008 * |
| 美国金属学会: "《金属手册 第9版 第10卷 材料特征性能及测定》", 31 August 1993, 机械工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109613706A (en) * | 2019-01-28 | 2019-04-12 | 京东方科技集团股份有限公司 | For the method for adjustment, equipment and storage medium of intelligent helmet |
| US11243608B2 (en) | 2019-01-28 | 2022-02-08 | Beijing Boe Optoelectronics Technology Co., Ltd. | Control method for head-mounted visual apparatus, head-mounted visual apparatus and computer readable storage medium |
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Application publication date: 20160330 |
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