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雷射聚焦探頭原理與應用

雷射聚焦探頭原理與應用. Class : 南台科技大學 機械系車輛三乙 Name :鄢代揚 Student ID : 49715061 Advisor :朱志良 教授. 目錄. 1. 雷射介紹 2. 四象限感測器 3. 雷射聚焦應用 4. 雷射聚焦原理 5. 聚焦探頭 6. 光碟讀取原理 7. 參考文獻. 雷射介紹.

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雷射聚焦探頭原理與應用

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  1. 雷射聚焦探頭原理與應用 Class:南台科技大學 機械系車輛三乙 Name :鄢代揚 Student ID :49715061 Advisor :朱志良 教授

  2. 目錄 • 1.雷射介紹 • 2.四象限感測器 • 3.雷射聚焦應用 • 4.雷射聚焦原理 • 5.聚焦探頭 • 6.光碟讀取原理 • 7.參考文獻

  3. 雷射介紹 雷射(英語:Light Amplification by Stimulated Emission of Radiation,縮寫為LASER,或laser),是指窄幅頻率的光輻射線,通過受激輻射放大和必要的反饋共振,產生準直、單色、相干的光束的過程及儀器。基本上,產生雷射需要「共振結構」、「增益介質」及「激發來源」這三個要素。 ▲主要部件1.活躍雷射介質2.光泵浦能量3.高反射率反射鏡4.輸出功率耦合器5.雷射光束

  4. 四象限感測器 四象限光電感測器(quadrant photodiode;QPD),的原理: 由物體的位置偏移所導致光強度在光電感測器中所造成的電壓值變化。 四象限光偵測器主要是透過光斑偏移的情形,進而分析出微粒子微小的偏移情形。四象限光偵測器是由四個光偵測器 1、2、3、4所組合而成。當光照射在四個偵測器上,經過放大器後分別產生V1、V2 、V3 、V4 的電壓訊號。其中光強度與電壓訊號成正比。當光斑往水平方向偏移時,四個光偵測器所偵測到的電壓訊號會產生改變。我們可以利用 Signal(x) =[(V1+V3)-(V2+V4)]/(V1+V2+V3+V4)得到物體水平方向偏移量。同理,我們利用 Signal(y) =[(V1+V2)-(V3+V4)]/(V1+V2+V3+V4)來得到物體在垂直方向上的偏移。而Signal(z)=(V1+V2+V3+V4) ▲像散法原理示意圖

  5. 雷射聚焦應用 • 醫療上用途 • 用來除斑、開刀、止血、治療網膜剝離、近視等。 • 生活上用途 • 雷射唱片、LD、V-CD、D-VD等。 • 工業上用途 • 測量距離、鑽孔、切割、焊接等。其它用途:遊戲玩具、教學指示筆等。

  6. 雷射聚焦原理

  7. 聚焦探頭

  8. 光碟機讀取原理 從雷射二極體所射出的雷射光,射到Lands(平地)的部分在反射回來的雷射光,其強度不會變弱,而射到Pits(訊洞)的部分在反射回來的雷射光,其強度則會變弱,光碟機就是經由雷射光的變化來辨別0與1。 ▲光碟片表面圖 Pits:於光碟軌道上挖坑所形成的坑洞; Lands:指在軌道上不挖坑的部分。

  9. 參考文獻 • http://tw.wrs.yahoo.com/_ylt=A8tUwZM2nuBNPhkAKDpr1gt.;_ylu=X3oDMTE1a2l2NGEwBHNlYwNzcgRwb3MDMQRjb2xvA3R3MQR2dGlkA1RXQzA3Ml8yODQ-/SIG=17655ecgm/EXP=1306594998/**http%3a//www.me.ntu.edu.tw/~measlab/course/%25E9%259B%25B7%25E5%25B0%2584%25E8%2581%259A%25E7%2584%25A6%25E6%258E%25A2%25E9%25A0%25AD%25E5%258E%259F%25E7%2590%2586%25E8%2588%2587%25E6%2587%2589%25E7%2594%25A8.pdf • http://zh.wikipedia.org/wiki/%E6%BF%80%E5%85%89#.E5.8E.9F.E7.90.86 • http://tw.wrs.yahoo.com/_ylt=A8tUwYPDneBNgnYAWulr1gt.;_ylu=X3oDMTE1a2l2NGEwBHNlYwNzcgRwb3MDMQRjb2xvA3R3MQR2dGlkA1RXQzA3Ml8yODQ-/SIG=12n9q8ukp/EXP=1306594883/**http%3a//tw.knowledge.yahoo.com/question/question%3fqid=1206100304529 • http://www.ic72.com/technology/info_121025.html • http://tw.knowledge.yahoo.com/question/question?qid=1405112014921 • http://static.bowenwang.com.cn/gif/cd-burner-2.jpg • http://tw.wrs.yahoo.com/_ylt=A8tUwYg0pOBNNFYAuHNr1gt.;_ylu=X3oDMTE1a2l2NGEwBHNlYwNzcgRwb3MDMQRjb2xvA3R3MQR2dGlkA1RXQzA3Ml8yODQ-/SIG=18obt4r1f/EXP=1306596532/**http%3a//el.mdu.edu.tw/datacos/09427011028A/%25E7%25A7%2591%25E6%258A%2580%25E7%2594%259F%25E6%25B4%25BB%25E6%25A6%2582%25E8%25AB%2596-5-%25E8%2582%25B2%25E6%25A8%2582-%25E5%2585%2589%25E7%25A2%259F%25E7%2587%2592%25E9%258C%2584%25E5%258E%259F%25E7%2590%2586.ppt • http://tw.image.search.yahoo.com/images/view?back=http%3A%2F%2Ftw.image.search.yahoo.com%2Fsearch%2Fimages%3Fp%3D%25E9%259B%25B7%25E5%25B0%2584%25E8%2581%259A%25E7%2584%25A6%26js%3D1%26b%3D81%26ni%3D20%26ei%3Dutf-8%26y%3D%25E6%2590%259C%25E5%25B0%258B%26xargs%3D0%26pstart%3D1%26fr%3Dyfp&w=413&h=374&imgurl=www.bbioo.com%2Finstrument%2FUploadFiles_5861%2F200712%2F20071203162853676.gif&rurl=http%3A%2F%2Fwww.bbioo.com%2Finstrument%2F2007%2Finstrument_20765.htm&size=6k&name=2007120316285367...&p=%E9%9B%B7%E5%B0%84%E8%81%9A%E7%84%A6&oid=ef5c631dbab05d88&fr2=&no=83&tt=2201&b=81&ni=20&sigr=11pbet4oi&sigi=126ki46oc&sigb=14rnbt4je&.crumb=HrSSM4NifJQ • http://www.sigma-koki.com/photo/C021107.jpg

  10. Thanks You

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