Pub Date : 2014-01-01DOI: 10.3788/CO.20140706.0956
何远清 He Yuan-qing, 刘永基 Liu Yong-ji, 翟奕 Zhai Yi
{"title":"Optical design of imaging keratometer","authors":"何远清 He Yuan-qing, 刘永基 Liu Yong-ji, 翟奕 Zhai Yi","doi":"10.3788/CO.20140706.0956","DOIUrl":"https://doi.org/10.3788/CO.20140706.0956","url":null,"abstract":"","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":"53 1","pages":"956-961"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74861525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.3788/CO.20140704.0644
高志良 Gao Zhi-liang
When assembling CCD of hyperspectral imager,20 μm focal depth should be satisfied in longitudinal direction,and alignment in spectral and spacial direction should also be achieved. An equivalent focal plane assembling module is designed to avoid frequent installation of expensive CCD during measurements.The equivalent module is precisely manufactured according to measured dimensions of CCD module. It also provides simulated spectral image that could be observed by microscope. By measuring distance between real and simulated spectral image,spacer's reshape value is calculated,and spectral image is aligned to CCD laterally. Experiment shows that the whole spectral image's defocusing value is in focal depth in the presence of tool microscope measuring error,spacer reparation error and interchangeability error. MTF is higher than 0. 3after 3 iterations in experiment,which shows an improvement on efficiency and safety.
{"title":"Design of hyperspectral imager equivalent focal plane assembling module","authors":"高志良 Gao Zhi-liang","doi":"10.3788/CO.20140704.0644","DOIUrl":"https://doi.org/10.3788/CO.20140704.0644","url":null,"abstract":"When assembling CCD of hyperspectral imager,20 μm focal depth should be satisfied in longitudinal direction,and alignment in spectral and spacial direction should also be achieved. An equivalent focal plane assembling module is designed to avoid frequent installation of expensive CCD during measurements.The equivalent module is precisely manufactured according to measured dimensions of CCD module. It also provides simulated spectral image that could be observed by microscope. By measuring distance between real and simulated spectral image,spacer's reshape value is calculated,and spectral image is aligned to CCD laterally. Experiment shows that the whole spectral image's defocusing value is in focal depth in the presence of tool microscope measuring error,spacer reparation error and interchangeability error. MTF is higher than 0. 3after 3 iterations in experiment,which shows an improvement on efficiency and safety.","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":"32 1","pages":"644-650"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74288389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.3788/co.20140705.0786
王永伟 Wang Yong-wei, 徐向东 Xu Xiang-dong, 高. G. Feng, 穆岩 Mu Yan, 宫亚坤 Gong Ya-kun
We proposed a method to accurately acquire the sin wave curve of strap-down north seeking signal acquisition system at different latitudes. According to the current value of dynamically tuned gyro output at different latitude we designed a system which can automatically adjust the sample resistor value using digital potentiometer. The data processing system calculates the latitude automatically based on dynamically tuned gyro signal and then the signal acquisition system resets the acquisition resistor value,and thus we can acquire the sin wave curve efficiently. Using this method we ensure that the north finder can meet the accuracy requirements at different geographical latitudes,and has strong adaptability and high stability.
{"title":"Signal sampling system of strap-down north seeking","authors":"王永伟 Wang Yong-wei, 徐向东 Xu Xiang-dong, 高. G. Feng, 穆岩 Mu Yan, 宫亚坤 Gong Ya-kun","doi":"10.3788/co.20140705.0786","DOIUrl":"https://doi.org/10.3788/co.20140705.0786","url":null,"abstract":"We proposed a method to accurately acquire the sin wave curve of strap-down north seeking signal acquisition system at different latitudes. According to the current value of dynamically tuned gyro output at different latitude we designed a system which can automatically adjust the sample resistor value using digital potentiometer. The data processing system calculates the latitude automatically based on dynamically tuned gyro signal and then the signal acquisition system resets the acquisition resistor value,and thus we can acquire the sin wave curve efficiently. Using this method we ensure that the north finder can meet the accuracy requirements at different geographical latitudes,and has strong adaptability and high stability.","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":"14 1","pages":"786-793"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84732347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.3788/CO.20140705.0801
夏蕾 Xia Lei, 韩旭东 Han Xu-dong, 邵俊峰 Shao Jun-feng
Double laser beam combination accuracy of wavelength multiplexing is carried in this article. Two beams with wavelengths of 532 nm and 515 nm are combined into one in the combination and detection system using light filter with special optical thin films,and the combination accuracy is detected. Based on this system,the corresponding theoretical model is established,and the comprehensive analysis on the error source and the value in combination and detection are given in this paper. When the pointing stability of both beams is 50 μrad,the theoretical value of combination accuracy is 14. 69″,and the proportion of pointing stability is99. 26%. The system gets an excellent anti interference ability against the unstable factor such as the error of centroid location( error rate 3 times),and the variation in accuracy rate is less than 2. 4 ‰. When the laser pointing stability is increased to 23. 51 μrad,the highest theoretical value of combination accuracy is 7. 09″and the proportion of pointing stability is 96. 77%. The system still has a high ability of anti-interference and the variation in the accuracy rate is less than 1%. Factors that affect the beam combination accuracy of near field and small power are laser beam pointing stability,mechanical adjustment and centroid location error are all the factors to affect the combination accuracy of the near field beam with low power,among which the laser pointing stability is the main factor. Adjusting the proportion of each factor,we can control the ability of anti interference of beam combination.
{"title":"Laser beam combination accuracy of wavelength multiplexing","authors":"夏蕾 Xia Lei, 韩旭东 Han Xu-dong, 邵俊峰 Shao Jun-feng","doi":"10.3788/CO.20140705.0801","DOIUrl":"https://doi.org/10.3788/CO.20140705.0801","url":null,"abstract":"Double laser beam combination accuracy of wavelength multiplexing is carried in this article. Two beams with wavelengths of 532 nm and 515 nm are combined into one in the combination and detection system using light filter with special optical thin films,and the combination accuracy is detected. Based on this system,the corresponding theoretical model is established,and the comprehensive analysis on the error source and the value in combination and detection are given in this paper. When the pointing stability of both beams is 50 μrad,the theoretical value of combination accuracy is 14. 69″,and the proportion of pointing stability is99. 26%. The system gets an excellent anti interference ability against the unstable factor such as the error of centroid location( error rate 3 times),and the variation in accuracy rate is less than 2. 4 ‰. When the laser pointing stability is increased to 23. 51 μrad,the highest theoretical value of combination accuracy is 7. 09″and the proportion of pointing stability is 96. 77%. The system still has a high ability of anti-interference and the variation in the accuracy rate is less than 1%. Factors that affect the beam combination accuracy of near field and small power are laser beam pointing stability,mechanical adjustment and centroid location error are all the factors to affect the combination accuracy of the near field beam with low power,among which the laser pointing stability is the main factor. Adjusting the proportion of each factor,we can control the ability of anti interference of beam combination.","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":"31 1","pages":"801-807"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90917712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.3788/CO.20140704.0608
刘东旭 Liu Dong-xu, 夏. X. Hong, 孙允陆 Sun Yun-lu, 陈岐岱 Chen Qi-dai, 董文飞 Dong Wen-fei
{"title":"Femtosecond laser direct writing bio-gel template for in situ synthesis of nanoparticles","authors":"刘东旭 Liu Dong-xu, 夏. X. Hong, 孙允陆 Sun Yun-lu, 陈岐岱 Chen Qi-dai, 董文飞 Dong Wen-fei","doi":"10.3788/CO.20140704.0608","DOIUrl":"https://doi.org/10.3788/CO.20140704.0608","url":null,"abstract":"","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":"46 1","pages":"608-615"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79667049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.3788/CO.20140704.0552
赵汝成 Zhao Ru-Cheng, 包建勋 Bao Jian-xun
{"title":"Investigation and application of large scale lightweight SiC mirror","authors":"赵汝成 Zhao Ru-Cheng, 包建勋 Bao Jian-xun","doi":"10.3788/CO.20140704.0552","DOIUrl":"https://doi.org/10.3788/CO.20140704.0552","url":null,"abstract":"","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":"3 1","pages":"552-558"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78526025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.3788/CO.20140706.0911
冯平 Feng Ping, 刘. L. Zhen
{"title":"Automatic localization method of the multi-planar strip in rudder angle measurement","authors":"冯平 Feng Ping, 刘. L. Zhen","doi":"10.3788/CO.20140706.0911","DOIUrl":"https://doi.org/10.3788/CO.20140706.0911","url":null,"abstract":"","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":"8 1","pages":"911-916"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83690197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.3788/CO.20140701.00-1B
张晓龙 Zhang Xiao-long, 刘. L. Ying, 王. W. Jian, 周. Z. Hao, 孙. S. Qiang
In order to keep high accuracy of temperature measurement of the cooled medium-wave infrared thermal imager after nonuniformity correction under different ambient temperatures,the calibration model of the medium-wave infrared thermal imager is analyzed with the consideration of the effect of the nonuniformity correction temperature. The nonuniformity of thermal imager is corrected using surface blackbody under different temperatures. The relationship between the gray and blackbody radiance is obtained by thermometry experiment of blackbody target. The mathematical calculation model of target temperature is established and the error of thermometry result is analyzed. The results show that the drift of gray of thermal image as nonuniformity correction radiance under different correction temperatures can be treated linearly,and is independent on the target temperature. When the nonuniformity is low,the temperature measurement error of the thermal imager is less than 0. 22 ℃,which greatly reduces the temperature measurement error of the cooled medium-wave infrared thermal imager after nonuniformity correction under different correction temperatures.
{"title":"Infrared thermometry technology with different nonuniformity correction temperatures","authors":"张晓龙 Zhang Xiao-long, 刘. L. Ying, 王. W. Jian, 周. Z. Hao, 孙. S. Qiang","doi":"10.3788/CO.20140701.00-1B","DOIUrl":"https://doi.org/10.3788/CO.20140701.00-1B","url":null,"abstract":"In order to keep high accuracy of temperature measurement of the cooled medium-wave infrared thermal imager after nonuniformity correction under different ambient temperatures,the calibration model of the medium-wave infrared thermal imager is analyzed with the consideration of the effect of the nonuniformity correction temperature. The nonuniformity of thermal imager is corrected using surface blackbody under different temperatures. The relationship between the gray and blackbody radiance is obtained by thermometry experiment of blackbody target. The mathematical calculation model of target temperature is established and the error of thermometry result is analyzed. The results show that the drift of gray of thermal image as nonuniformity correction radiance under different correction temperatures can be treated linearly,and is independent on the target temperature. When the nonuniformity is low,the temperature measurement error of the thermal imager is less than 0. 22 ℃,which greatly reduces the temperature measurement error of the cooled medium-wave infrared thermal imager after nonuniformity correction under different correction temperatures.","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72781475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.3788/CO.20140703.0442
齐立涛 Qi Li-tao
Lasers with wavelengths of 532 nm,355 nm and 266 nm are obtained using harmonic generation of a Nd∶ YAG solid-state laser by nonlinear optical crystal. The relationship between the absorption of single crystal silicon and the laser wavelength and ablation characteristics of single crystal silicon by 3 different wavelength lasers under vacuum condition are studied. The results show that single crystal silicon has a good absorption of ultraviolet laser in the wavelength range of 100- 370 nm,and under the same conditions,the minimum single pulse energy for 532 nm laser ablation of silicon is 30 μJ and the minimum single pulse energy for 355 nm or 266 nm laser ablation of silicon is 15 μJ. The ablation threshold values of 532 nm,355 nm and 266 nm laser ablation of silicon are different,which become smaller with the decrease of wavelength.
{"title":"Different wavelength solid-state laser ablation of silicon wafer in vacuum","authors":"齐立涛 Qi Li-tao","doi":"10.3788/CO.20140703.0442","DOIUrl":"https://doi.org/10.3788/CO.20140703.0442","url":null,"abstract":"Lasers with wavelengths of 532 nm,355 nm and 266 nm are obtained using harmonic generation of a Nd∶ YAG solid-state laser by nonlinear optical crystal. The relationship between the absorption of single crystal silicon and the laser wavelength and ablation characteristics of single crystal silicon by 3 different wavelength lasers under vacuum condition are studied. The results show that single crystal silicon has a good absorption of ultraviolet laser in the wavelength range of 100- 370 nm,and under the same conditions,the minimum single pulse energy for 532 nm laser ablation of silicon is 30 μJ and the minimum single pulse energy for 355 nm or 266 nm laser ablation of silicon is 15 μJ. The ablation threshold values of 532 nm,355 nm and 266 nm laser ablation of silicon are different,which become smaller with the decrease of wavelength.","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":"7 1","pages":"442-448"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85721411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.3788/CO.20140703.0449
白. B. Yu, 廖志远 Liao Zhi-yuan, 李. L. Hua, 程习敏 Cheng Xi-min, 邢廷文 Xing Ting-wen, 蒋亚东 Jiang Ya-dong
{"title":"Application of the chalcogenide glass in modern infrared thermal imaging systems","authors":"白. B. Yu, 廖志远 Liao Zhi-yuan, 李. L. Hua, 程习敏 Cheng Xi-min, 邢廷文 Xing Ting-wen, 蒋亚东 Jiang Ya-dong","doi":"10.3788/CO.20140703.0449","DOIUrl":"https://doi.org/10.3788/CO.20140703.0449","url":null,"abstract":"","PeriodicalId":10133,"journal":{"name":"Chinese Journal of Optics and Applied Optics","volume":"37 1","pages":"449-455"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82459135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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