| 光学镀膜近红外膜厚监控的信号压噪 |
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| 引用本文： | 马云飞,王自鑫,江绍基,余卫龙,朱析,蔡志岗,李宝军.光学镀膜近红外膜厚监控的信号压噪[J].光学仪器,2004,26(2):99-104. |
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| 作者姓名： | 马云飞 王自鑫 江绍基 余卫龙 朱析 蔡志岗 李宝军 |
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| 作者单位： | 中山大学光电材料与技术国家重点实验室,广东,广州,510275;中山大学光电材料与技术国家重点实验室,广东,广州,510275;中山大学光电材料与技术国家重点实验室,广东,广州,510275;中山大学光电材料与技术国家重点实验室,广东,广州,510275;中山大学光电材料与技术国家重点实验室,广东,广州,510275;中山大学光电材料与技术国家重点实验室,广东,广州,510275;中山大学光电材料与技术国家重点实验室,广东,广州,510275 |
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| 摘 要： | 在光学真空镀膜膜厚监控过程中,近红外波段信号弱、外界干扰大、信噪比低,难于检测监控。运用相干检测、锁相放大原理,在光学真空镀膜机可见光波段监控系统的基础上,自行研制锁相放大器和改装近红外探头,成功地实现了近红外信号的压噪、放大、滤波和检测监控。
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| 关 键 词： | 近红外 光学薄膜 膜厚监控 锁相放大 |
| 文章编号： | 1005-5630(2004)02-0099-06 |
| 修稿时间： | 2003年11月30 |
Depress noise of near infrared signal for optical coating |
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| MA Yun-fei,WANG Zi-xin,JIANG SHao-ji,SHE Wei-long,ZHU Xi,CAI ZHi-gang,LI Bao-jun es,Sun Yat-Sen University,Guangzhou,China.Depress noise of near infrared signal for optical coating[J].Optical Instruments,2004,26(2):99-104. |
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| Authors: | MA Yun-fei WANG Zi-xin JIANG SHao-ji SHE Wei-long ZHU Xi CAI ZHi-gang LI Bao-jun es Sun Yat-Sen University Guangzhou China |
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| Affiliation: | MA Yun-fei,WANG Zi-xin,JIANG SHao-ji,SHE Wei-long,ZHU Xi,CAI ZHi-gang,LI Bao-jun es,Sun Yat-Sen University,Guangzhou 510275,China) |
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| Abstract: | To amplify, filter, and monitor weak near infrared signal from strong noise during optical coating, a locking-in amplifier with near infrared detector has been designed based on the principle of visible optical monitoring system for optical coating. By using the designed locking-in amplifier, the weak near infrared signal was monitored successfully from the strong noise during optical coating and the characteristics of the weak near infrared signal was characterized easily. |
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| Keywords: | near infrared optical coatings monitoring of coating thickness locking-in amplify |
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