CN104048915A - Real-time monitoring device and method of optical material and laser interaction process - Google Patents
Real-time monitoring device and method of optical material and laser interaction process Download PDFInfo
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- CN104048915A CN104048915A CN201410295880.XA CN201410295880A CN104048915A CN 104048915 A CN104048915 A CN 104048915A CN 201410295880 A CN201410295880 A CN 201410295880A CN 104048915 A CN104048915 A CN 104048915A
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Abstract
The invention provides a real-time monitoring device of an optical material and laser interaction process. The real-time monitoring device comprises a radiation laser light source, a detection light source, a photoelectric detector, a scattered light detector and a fluorescent probe which are respectively connected with the optical material through a light path, wherein a first detection light focusing device is arranged between the detection light source and the optical device; a second detection light focusing device, a detection light filtering device and a space filter are sequentially arranged between the optical material and the photoelectric detector; a scattered light collecting device and a scattered light filtering device are sequentially arranged between the optical material and the scattered light detector; a fluorescent collecting device and a fluorescent filtering device are sequentially arranged between the optical material and the fluorescent probe. The invention further provides a real-time monitoring method of the optical material and laser interaction process. According to the real-time monitoring device, the state of the optical material is favorably mastered in time, whether the optical material is damaged under the continuous radiation of laser can be predicted, unnecessary loss is reduced, and the use cost of a laser system is greatly saved.
Description
Technical field
The present invention relates to the detection technique field of optical material and element, specifically real-time monitoring device and the method for a kind of optical material and laser interaction process.
Background technology
In a lot of optical systems, particularly, in strong laser system, the optical characteristics of adopted optical material and element is had to strict requirement, such as the homogeneity of the yardstick of laser-damaged threshold value, defect and density, optical characteristics etc.In existing optical system, it to the detection evaluation of the optical characteristics of adopted optical material and element, is substantially all the mode that adopts off-line type, and adopt respectively diverse ways to detect to different optical characteristics, such as defect being detected to analysis by scattering microtechnic or fluorescence microscopy, utilize laser calorimetry or spectrophotometric method to measure optical absorption characteristic etc.
Research shows, under laser irradiation, due to the interaction of laser and material, can cause that material behavior changes.Because the variation of this specific character tends to have influence on the performance of these materials in optical system, thereby have influence on the operation of whole optical system, and sometimes, the variation of the material behavior that this laser causes is also relevant with the time length of laser irradiation, therefore, the necessary process to these optical material Stimulated Light irradiation, or perhaps the interactional process of laser and material is carried out Real-Time Monitoring.
Summary of the invention
The object of the present invention is to provide real-time monitoring device and the method for a kind of optical material and laser interaction process, real-time detection is carried out in variation by the photo-thermal absorption signal under laser irradiation to optical material, and in conjunction with the real-time detection of the variation of scattered light signal and the variation of LASER Excited Fluorescence, obtains the real-time information of optical material and laser interaction process.
Technical scheme of the present invention is:
A real-time monitoring device for optical material and laser interaction process, comprises the irradiation laser light source, probe source, photodetector, detector for scattered light and the fluorescent probe that are connected with optical material light path respectively; Between described probe source and optical material, be provided with and survey light the first focalizer; Between described optical material and photodetector, be provided with successively and survey light the second focalizer, survey light filtering apparatus and spatial filter; Between described optical material and detector for scattered light, be provided with successively scattered light gathering-device and scattered light filtering apparatus; Between described optical material and fluorescent probe, be provided with successively phosphor collection device and fluorescence filtering apparatus.
The real-time monitoring device of described optical material and laser interaction process, is provided with and surveys light angular adjustment apparatus between described detection light the second focalizer and detection light filtering apparatus.
The real-time monitoring device of described optical material and laser interaction process, is provided with between described detection light filtering apparatus and spatial filter and surveys light light-dividing device, and the reflected light path of described detection light light-dividing device is provided with detection of optical power sniffer.
A method of real-time for optical material and laser interaction process, comprises the following steps:
(1) laser beam irradiation of irradiation laser light source being exported is to optical material;
(2) will after the detection light light beam focusing of probe source output, also be irradiated on optical material, and overlap with the irradiation area of irradiation laser light beam;
(3) to the detection light light beam from optical material outgoing focus on, optical filtering and spatial filtering process, and adopts photodetector to survey treated detection light light beam;
(4) irradiation laser of scattering from optical material is collected and filtered processing, and adopt detector for scattered light to survey treated irradiation laser;
(5) to optical material because of the processing of collecting and filter of the fluorescence of generation that laser irradiation excites, and adopt fluorescent probe to survey treated fluorescence.
As shown from the above technical solution, the present invention is by the real-time detection to optical material variation of photo-thermal absorption characteristic under laser irradiation, real-time detection in conjunction with to the variation of the variation of scattered light signal and LASER Excited Fluorescence signal, can obtain the real-time information of optical material and laser interaction process.The present invention can be used for the real time on-line monitoring of optical material and element in optical system.By the real time on-line monitoring of optical material and laser interaction process is analyzed, contribute to understand in time optical material and the residing state of element grasped, whether can predict optical material can damage under the chronic exposure of laser, thereby can take appropriate measures in advance to avoid the generation of damage process, reduce unnecessary loss, greatly save the use cost of laser system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the real-time monitoring device of transmission class optical material of the present invention and laser interaction process;
Fig. 2 is the structural representation of the real-time monitoring device of reflection class optical material of the present invention and laser interaction process.
In upper figure: 1-irradiation laser light source, 2-optical material sample, 3-probe source, 4-surveys light the first focalizer, 5-surveys light the second focalizer, 6-surveys light angular adjustment apparatus, 7-surveys light filtering apparatus, 8-surveys light light-dividing device, 9-detection of optical power sniffer, 10-surveys light spatial filter, 11-photodetector, 12-scattered light gathering-device, 13-scattered light filtering apparatus, 14-detector for scattered light, 15-phosphor collection device, 16-fluorescence filtering apparatus, 17-fluorescent probe.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, a kind of real-time monitoring device for transmission class optical material and laser interaction process, include irradiation laser light source 1, optical material sample 2, probe source 3, survey light the first focalizer 4, survey light the second focalizer 5, survey light angular adjustment apparatus 6, survey light filtering apparatus 7, survey light light-dividing device 8, detection of optical power sniffer 9, survey light spatial filter 10, photodetector 11, scattered light gathering-device 12, scattered light filtering apparatus 13, detector for scattered light 14, phosphor collection device 15, fluorescence filtering apparatus 16 and fluorescent probe 17.
Survey light the first focalizer 4, detection light the second focalizer 5, scattered light gathering-device 12 and phosphor collection device 15 and can adopt condenser lens, survey light angular adjustment apparatus 6 and can adopt high reflection mirror, survey light filtering apparatus 7, scattered light filtering apparatus 13 and fluorescence filtering apparatus 16 and can adopt optical filter, survey light light-dividing device 8 and can adopt light splitting piece or Amici prism, detection of optical power sniffer 9 can adopt light power meter or optical power detector.
The laser beam irradiation being sent by irradiation laser light source 1 is to optical material sample 2, absorption due to 2 pairs of irradiation laser energy of optical material sample, can in Ear Mucosa Treated by He Ne Laser Irradiation region, produce temperature rise, the physical characteristics of optical material sample 2 is changed, produce the phenomenons such as photothermal laser effect.
The detection light light beam being sent by probe source 3 focuses on optical material sample 2 by surveying light the first focalizer, area coincidence with irradiation laser irradiation, from the detection light light beam of optical material sample 2 transmissions, pass through successively detection light the second focalizer 5, survey light angular adjustment apparatus 6, through surveying light filtering apparatus 7, filter again the parasitic light of other wave band except surveying light, then by surveying light light-dividing device 8, be divided into two bundles, a branch of detection of optical power sniffer 9 that enters, for surveying surveying the power of light, another Shu Ze is surveyed by photodetector 11 after spatial filter 10 is processed.
From optical material sample 2, the irradiation laser of scattering is collected by scattered light gathering-device 12, then by detector for scattered light 14, is surveyed after scattered light filtering apparatus 13 filters.
Optical material sample 2 is collected by phosphor collection device 15 because of the fluorescence of generation that laser irradiation excites, then by fluorescent probe 17, is surveyed after fluorescence filtering apparatus 16 filters.
Principle of work of the present invention:
Optical material is under Irradiation of High, and absorbing laser energy causes that local temperature raises, and produces induced with laser photo-thermal effect, thereby causes that the physical characteristics of optical material changes, such as the variation of surperficial thermal deformation, refractive index etc.Now, also pass through the irradiation zone (producing the region of photo-thermal effect) of intense laser beam with the weak detecting light beam of another bundle, the propagation characteristic of this detecting light beam can change, such as producing newly-increased dispersing or convergence effect.The size of the variation of this propagation characteristic is relevant to the absorptivity of optical material, heat diffusion properties etc., absorbs greatlyr, and the variation of propagation characteristic is also larger.The variation of this propagation characteristic detects by placing a spatial filter in the detection light path in outgoing.After spatial filter, arrive photodetector detection luminous energy can due to survey light newly-increased disperse or convergence effect changes.Meanwhile, optical material, under laser irradiation, can cause the scattering of irradiation laser, and because the energy of absorbing laser can excite generation fluorescence.
In laser chronic exposure process, particularly in the irradiation process of light laser, because the continuous accumulation of laser energy on optical material, the photo-thermal absorption characteristic of optical material also can change continuously, therefore, the present invention obtains the real-time information of optical material and laser interaction process by the Real-Time Monitoring of the photo-thermal absorption characteristic under laser chronic exposure to optical material.In addition, in the process of laser irradiation, scattered light and fluorescence also may correspondingly change, therefore, when Real-Time Monitoring photo-thermal absorption characteristic changes, the variation of the variation of scattered light signal and LASER Excited Fluorescence signal is also carried out to Real-Time Monitoring, can obtain so the more real-time information about optical material and laser interaction process.
Figure 2 shows that the real-time monitoring device that can be used for reflecting class optical material and laser interaction process, its structure is all similar to the monitoring device of laser interaction process to the transmission class optical material shown in Fig. 1 with principle, repeats no more.
The above embodiment is only that the preferred embodiment of the present invention is described; not scope of the present invention is limited; design under the prerequisite of spirit not departing from the present invention; various distortion and improvement that those of ordinary skills make technical scheme of the present invention, all should fall in the definite protection domain of claims of the present invention.
Claims (4)
1. a real-time monitoring device for optical material and laser interaction process, is characterized in that: comprise the irradiation laser light source, probe source, photodetector, detector for scattered light and the fluorescent probe that are connected with optical material light path respectively; Between described probe source and optical material, be provided with and survey light the first focalizer; Between described optical material and photodetector, be provided with successively and survey light the second focalizer, survey light filtering apparatus and spatial filter; Between described optical material and detector for scattered light, be provided with successively scattered light gathering-device and scattered light filtering apparatus; Between described optical material and fluorescent probe, be provided with successively phosphor collection device and fluorescence filtering apparatus.
2. the real-time monitoring device of optical material according to claim 1 and laser interaction process, is characterized in that: between described detection light the second focalizer and detection light filtering apparatus, be provided with and survey light angular adjustment apparatus.
3. the real-time monitoring device of optical material according to claim 1 and laser interaction process, it is characterized in that: between described detection light filtering apparatus and spatial filter, be provided with and survey light light-dividing device, the reflected light path of described detection light light-dividing device is provided with detection of optical power sniffer.
4. a method of real-time for optical material and laser interaction process, is characterized in that, comprises the following steps:
(1) laser beam irradiation of irradiation laser light source being exported is to optical material;
(2) will after the detection light light beam focusing of probe source output, also be irradiated on optical material, and overlap with the irradiation area of irradiation laser light beam;
(3) to the detection light light beam from optical material outgoing focus on, optical filtering and spatial filtering process, and adopts photodetector to survey treated detection light light beam;
(4) irradiation laser of scattering from optical material is collected and filtered processing, and adopt detector for scattered light to survey treated irradiation laser;
(5) to optical material because of the processing of collecting and filter of the fluorescence of generation that laser irradiation excites, and adopt fluorescent probe to survey treated fluorescence.
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| CN104458691A (en) * | 2014-12-25 | 2015-03-25 | 合肥知常光电科技有限公司 | Photothermal-fluorescent double-mode spectrum detection device and detection method thereof |
| WO2018121799A1 (en) * | 2016-12-26 | 2018-07-05 | 同方威视技术股份有限公司 | Raman spectrum detection device and detection safety monitoring method therefor |
| CN108732154A (en) * | 2017-04-25 | 2018-11-02 | 上海星必光电科技有限公司 | handheld Raman spectrometer |
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Application publication date: 20140917 |