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Shared apertures in tracking turbulence-induced wavefront tilt errors 共享孔径跟踪湍流引起的波前倾斜误差
Conference on Laser and Electrooptical Systems Pub Date : 1900-01-01 DOI: 10.1364/cleos.1976.thf10
D. Greenwood
{"title":"Shared apertures in tracking turbulence-induced wavefront tilt errors","authors":"D. Greenwood","doi":"10.1364/cleos.1976.thf10","DOIUrl":"https://doi.org/10.1364/cleos.1976.thf10","url":null,"abstract":"In many optical pointing and tracking systems it is not practical to beam split the incoming wavefront in order to derive a tracking signal. The tracker optics are typically placed adjacent to a larger pointing mirror or telescope. We have found that this configuration is not optimum in tracking turbulence-induced wavefront errors. Instead, the tracker should either be in the region of the pointer central obscuration or be in a thin annulus surrounding the pointer. Wherever the tracker is located, its signal should be low-pass filtered, perhaps by the servo itself. Low frequencies correspond to large-scale turbulence, and such turbulence appears the same to both the pointer and the tracker.","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122077025","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}
引用次数: 0
3M electron beam laser 3M电子束激光器
Conference on Laser and Electrooptical Systems Pub Date : 1900-01-01 DOI: 10.1364/cleos.1976.thb7
J. R. Packard
{"title":"3M electron beam laser","authors":"J. R. Packard","doi":"10.1364/cleos.1976.thb7","DOIUrl":"https://doi.org/10.1364/cleos.1976.thb7","url":null,"abstract":"The electron beam laser is a technology in which laser emission is generated by exciting a single crystal semiconductor cavity with a high-energy electron beam. A large number of semiconductor materials have been shown capable of producing laser emission in this way. Of significance is that these materials include several II–VI semiconducting compounds from which junction laser emission has not been observed.","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116620646","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}
引用次数: 0
Performance and growth potential of CO2 laser space communication systems CO2激光空间通信系统的性能和发展潜力
Conference on Laser and Electrooptical Systems Pub Date : 1900-01-01 DOI: 10.1364/cleos.1976.thb2
F. Goodwin, D. Henderson, T. Nussmeier, L. Stokes
{"title":"Performance and growth potential of CO2 laser space communication systems","authors":"F. Goodwin, D. Henderson, T. Nussmeier, L. Stokes","doi":"10.1364/cleos.1976.thb2","DOIUrl":"https://doi.org/10.1364/cleos.1976.thb2","url":null,"abstract":"The historic trend in satellite communications has seen communication bandwidth utilization increasing 3 orders of magnitude per decade. This trend points toward common usage of gigabit per second data rates in the 1980s. Mission constraints and requirements lead to the conclusion that the most efficient means of transmitting such data from a satellite in low earth orbit to a single earth station is a laser data link through a geosynchronous relay satellite. The laser link is attractive because of its small antenna size and competitive power and weight compared to rf systems.","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"1807 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129676502","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}
引用次数: 0
OMEGA-X: a high peak power glass laser users facility OMEGA-X:高峰值功率玻璃激光用户设备
Conference on Laser and Electrooptical Systems Pub Date : 1900-01-01 DOI: 10.1364/cleos.1976.thd5
M. Lubin, J. Soures
{"title":"OMEGA-X: a high peak power glass laser users facility","authors":"M. Lubin, J. Soures","doi":"10.1364/cleos.1976.thd5","DOIUrl":"https://doi.org/10.1364/cleos.1976.thd5","url":null,"abstract":"Studies in laser-pellet fusion, x-ray generation and the development of an x-ray laser, high energy density equation of state, and the fundamental interaction of intense radiation with single particles will benefit from the availability of a multikilojoule high brightness radiation source.","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134441764","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}
引用次数: 0
Efficient high-power CH3F 496-μm laser systems 高效大功率ch3f496 μm激光系统
Conference on Laser and Electrooptical Systems Pub Date : 1900-01-01 DOI: 10.1364/cleos.1976.we4
T. Plant, T. Detemple
{"title":"Efficient high-power CH3F 496-μm laser systems","authors":"T. Plant, T. Detemple","doi":"10.1364/cleos.1976.we4","DOIUrl":"https://doi.org/10.1364/cleos.1976.we4","url":null,"abstract":"Many different configurations, both cw and pulsed, have been reported for a 496-μm CH3F laser optically pumped with a CO2 laser; however, none as yet has both the high efficiency and good beam quality required for plasma diagnostics applications.1-4 Simple superradiant geometries using multimode TEA CO2 lasers have produced peak powers > 1 MW, but in pulses with subnanosecond structure.2 Complicated cavity geometries have yielded smooth pulses but only at lower powers, and both methods have a photon conversion efficiency (number of 496-μm quanta/number of CO2 quanta absorbed) of only ~5%.","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131259039","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}
引用次数: 0
Infrared pyrometer for high-resolution surface temperature measurements on rotating turbine blades 用于旋转涡轮叶片高分辨率表面温度测量的红外高温计
Conference on Laser and Electrooptical Systems Pub Date : 1900-01-01 DOI: 10.1364/cleos.1976.wc8
O. W. Uguccini
{"title":"Infrared pyrometer for high-resolution surface temperature measurements on rotating turbine blades","authors":"O. W. Uguccini","doi":"10.1364/cleos.1976.wc8","DOIUrl":"https://doi.org/10.1364/cleos.1976.wc8","url":null,"abstract":"A high-resolution radiation pyrometer, designed at the NASA Lewis Research Center, was tested on an operating turbine engine. This pyrometer was used to obtain temperature profiles of the viewed surface of several turbine blades at blade tip speeds up to 366 m/sec (1200 fps).","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132550790","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}
引用次数: 0
Applications of Stark cells to CO2 laser communication Stark电池在CO2激光通信中的应用
Conference on Laser and Electrooptical Systems Pub Date : 1900-01-01 DOI: 10.1364/cleos.1976.thb5
R. Abrams, C. Asawa, T. Plant, G. Tangonan
{"title":"Applications of Stark cells to CO2 laser communication","authors":"R. Abrams, C. Asawa, T. Plant, G. Tangonan","doi":"10.1364/cleos.1976.thb5","DOIUrl":"https://doi.org/10.1364/cleos.1976.thb5","url":null,"abstract":"The availability of Stark tunable molecular absorption lines coincident with CO2 laser transitions has led to several applications in laser communications. Three applications are described here: (1) frequency stabilization of a CO2 laser; (2) a technique for direct demodulation of an optical FM signal; and (3) a method for producing single sideband ir modulation at microwave frequencies.","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114970150","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}
引用次数: 0
Performance characteristics of a holographic laser beam deflector 全息激光束偏转器的性能特性
Conference on Laser and Electrooptical Systems Pub Date : 1900-01-01 DOI: 10.1364/cleos.1976.wd7
R. Pole, H. Werlich
{"title":"Performance characteristics of a holographic laser beam deflector","authors":"R. Pole, H. Werlich","doi":"10.1364/cleos.1976.wd7","DOIUrl":"https://doi.org/10.1364/cleos.1976.wd7","url":null,"abstract":"The concept of the holographic deflector has been described previously.1 This paper, in addition to reviewing the principles, describes the development of a prototype device and its performance characteristics.","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"409 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116333960","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}
引用次数: 0
Laser scanning system for roller bearing quality assurance 激光扫描系统用于滚子轴承的质量保证
Conference on Laser and Electrooptical Systems Pub Date : 1900-01-01 DOI: 10.1364/cleos.1976.wh3
C. K. Cheng
{"title":"Laser scanning system for roller bearing quality assurance","authors":"C. K. Cheng","doi":"10.1364/cleos.1976.wh3","DOIUrl":"https://doi.org/10.1364/cleos.1976.wh3","url":null,"abstract":"This paper describes the design and engineering of an automatic inspection system for detecting minute flaws during the manufacture of precision roller bearings used in aircraft. The various types of flaws to be detected are scratches, pits, voids in seams, rust, and other surface flaws whose sizes are usually in the order of 25 μm. Visual inspection is impractical and subject to human errors.","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133737191","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}
引用次数: 0
Application of adaptive optical techniques to figure control of large telescopes 自适应光学技术在大型望远镜图形控制中的应用
Conference on Laser and Electrooptical Systems Pub Date : 1900-01-01 DOI: 10.1364/cleos.1976.thf1
R. M. Scott
{"title":"Application of adaptive optical techniques to figure control of large telescopes","authors":"R. M. Scott","doi":"10.1364/cleos.1976.thf1","DOIUrl":"https://doi.org/10.1364/cleos.1976.thf1","url":null,"abstract":"Large telescopes in space offer a great advantage to astronomers because their performance is not limited by the atmosphere. The space environment provides a further advantage in that it is free of gravity, but the thermal environment is a distinct disadvantage with respect to the performance of large optics. Weight in a large space system is always a major design problem. With these considerations in mind there has been increasing consideration of large mirrors of light weight, but this results in considerable flexibility. This paper reviews the progress toward systems in which the errors of figure of the mirror in space are measured and corrections made to perfect the figure by the application of controlled mechanical stresses. Several laboratory systems to demonstrate the principles and the design of a system for the Large Space Telescope are described. Some directions for future development are indicated.","PeriodicalId":301658,"journal":{"name":"Conference on Laser and Electrooptical Systems","volume":"276 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133043024","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}
引用次数: 0
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