本文選題：光束質(zhì)量　切入點(diǎn)：M2因子　出處：《華中科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著激光技術(shù)在各個(gè)領(lǐng)域的應(yīng)用不斷拓展,如何有效的檢測(cè)和評(píng)價(jià)激光光束質(zhì)量成為了激光技術(shù)研究的一個(gè)關(guān)鍵問(wèn)題。從衍射極限因子M2因子在上世紀(jì)90年代被提出后,它就成為了一種有效而常用的衡量激光光束質(zhì)量的方法了,如何能夠快速有效的測(cè)量M2因子也成為了一個(gè)人們研究的熱點(diǎn)。本文基于CMOS相機(jī)設(shè)計(jì)并完成了一套高精度激光光束質(zhì)量測(cè)量系統(tǒng),該系統(tǒng)首先通過(guò)圖像處理法獲取光束偏轉(zhuǎn)角度,再自動(dòng)由電動(dòng)微調(diào)裝置控制反射鏡改變光束傳輸方向從而完成光路的高精度調(diào)整,實(shí)現(xiàn)光束垂直入射相機(jī)光敏面的目的,在此基礎(chǔ)上系統(tǒng)可以實(shí)現(xiàn)M2因子的自動(dòng)測(cè)量。論文的主要研究成果如下:1.研究了現(xiàn)有激光光束質(zhì)量評(píng)價(jià)方法,圍繞激光光束M2因子測(cè)量制定了激光光束質(zhì)量測(cè)量的總體方案�；谥匦姆ê投A矩法設(shè)計(jì)了計(jì)算激光光斑中心與尺寸的圖像處理方法。根據(jù)光束質(zhì)量測(cè)量中光路調(diào)整的要求,設(shè)計(jì)了基于圖像處理的光路高精度調(diào)整方法。2.設(shè)計(jì)并完成了激光光束質(zhì)量測(cè)量系統(tǒng)的軟硬件。其中軟件包括系統(tǒng)設(shè)置、步進(jìn)電機(jī)控制、圖像預(yù)處理和參數(shù)計(jì)算等模塊,硬件包括系統(tǒng)光路、單片機(jī)控制、圖像采集、精密電動(dòng)微調(diào)及其驅(qū)動(dòng)和定位等模塊,并進(jìn)行了軟硬件聯(lián)合調(diào)試。3.對(duì)所研制的激光光束質(zhì)量測(cè)量系統(tǒng)進(jìn)行了一系列實(shí)驗(yàn)測(cè)試。結(jié)果表明:(1)本系統(tǒng)可以高效率的完成光路調(diào)整,調(diào)整后的光束偏移角度不超過(guò)設(shè)定偏轉(zhuǎn)閾值0.05°;(2)不同焦距透鏡對(duì)光束質(zhì)量測(cè)量影響較小;(3)選取不同波長(zhǎng)進(jìn)行測(cè)量對(duì)比時(shí),本系統(tǒng)光束質(zhì)量測(cè)量結(jié)果與商用系統(tǒng)基本一致,但重復(fù)精度更高,并且重復(fù)測(cè)量偏差可以達(dá)到1.0%以下。
[Abstract]:With the continuous development of laser technology in various fields, how to effectively detect and evaluate laser beam quality has become a key issue in laser technology. After the diffraction limit factor M2 factor was proposed in -10s, It has become an effective and commonly used way to measure the quality of laser beams. How to measure M2 factor quickly and effectively has become a hot topic. A high precision laser beam quality measurement system based on CMOS camera is designed and completed in this paper. The system firstly acquires the beam deflection angle by image processing method, and then automatically controls the reflector to change the direction of beam transmission by the electric fine-tuning device, thus accomplishing the high-precision adjustment of the light path, thus realizing the objective of the Guang Min plane of the camera with the vertical incidence of the beam. On this basis, the system can realize the automatic measurement of M2 factor. The main research results of this paper are as follows: 1. The existing methods of laser beam quality evaluation are studied. The overall scheme of laser beam quality measurement is established around the M2 factor measurement of laser beam. An image processing method for calculating the center and size of laser spot is designed based on the center of gravity method and the second order moment method. According to the requirements of light path adjustment in beam quality measurement, The high precision adjustment method of optical path based on image processing is designed. The hardware and software of laser beam quality measurement system are designed and completed. The software includes system setup, step motor control, image preprocessing and parameter calculation, etc. The hardware includes system optical path, single-chip microcomputer control, image acquisition, precision electric fine-tuning, driving and positioning modules, etc. A series of experimental tests on the laser beam quality measurement system have been carried out. The results show that the system can efficiently adjust the optical path. When the adjusted deviation angle of the beam does not exceed the set deflection threshold of 0.05 擄/ 2) the influence of different focal lens on the measurement of beam quality is smaller than that of different wavelengths, the results of beam quality measurement of the system are basically consistent with those of the commercial system. But the repetition accuracy is higher, and the error of repeated measurement can reach below 1.0%.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN24

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 丁罕;王海娟;樊翔;;激光光束遠(yuǎn)場(chǎng)發(fā)散角測(cè)量方法[J];中國(guó)醫(yī)療器械信息;2013年06期

2 韓立強(qiáng);王志斌;;自適應(yīng)光學(xué)校正下空間光通信的光纖耦合效率及斯特列爾比[J];紅外與激光工程;2013年01期

3 郭玉波;姚郁;怓曉光;;基于空間矩的圓標(biāo)記中心亞像素定位算法[J];吉林大學(xué)學(xué)報(bào)(工學(xué)版);2009年01期

4 樊心民;鄭義;孫啟兵;王冠軍;曾灝憲;邴丕彬;任懷遠(yuǎn);;90/10刀口法測(cè)量激光高斯光束束腰的實(shí)驗(yàn)研究[J];激光與紅外;2008年06期

5 藍(lán)章禮;楊小帆;;激光光斑中心定位算法的實(shí)用性改進(jìn)[J];計(jì)算機(jī)工程;2008年06期

6 朱莉華,聶義友,呂百達(dá);光束束寬概念和不同定義束寬的比較[J];光子學(xué)報(bào);2005年10期

7 劉升;二相步進(jìn)電機(jī)驅(qū)動(dòng)芯片TA8435H及其應(yīng)用[J];國(guó)外電子元器件;2005年03期

8 曹一磊,高春清;基于面陣CCD的激光光束參數(shù)測(cè)量系統(tǒng)精度分析[J];光學(xué)技術(shù);2004年05期

9 羅延明,羅耀華,孟繁榮;步進(jìn)電機(jī)高低壓電源驅(qū)動(dòng)電路設(shè)計(jì)[J];應(yīng)用科技;2004年09期

10 高衛(wèi);激光束衍射極限倍數(shù)β的確定方法[J];光子學(xué)報(bào);2003年09期

相關(guān)碩士學(xué)位論文 前1條

1 賈少春;激光光束質(zhì)量評(píng)價(jià)參數(shù)測(cè)量技術(shù)研究[D];西安電子科技大學(xué);2011年

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