Adaptive Optics最新文献

{"title":"Keck Adaptive Optics: Optical Bench Subsystem","authors":"T. Gregory, P. Wizinowich, D. S. Acton, A. Gleckler, P. Stomski, S. Radau, J. Maute, M. Sirota","doi":"10.1364/adop.1996.amb.2","DOIUrl":"https://doi.org/10.1364/adop.1996.amb.2","url":null,"abstract":"The W. M. Keck Observatory and Lawrence Livermore National Labs are currently developing an adaptive optics (AO) system for use on the 10-meter Keck II telescope. This paper will review the Optical Bench Subsystem, placing emphasis on the requirements that led to the current design.","PeriodicalId":256393,"journal":{"name":"Adaptive Optics","volume":"21 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":"126601367","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}

{"title":"Review of Large Telescope Adaptive Optics Systems","authors":"D. Sandler","doi":"10.1364/adop.1996.ama.1","DOIUrl":"https://doi.org/10.1364/adop.1996.ama.1","url":null,"abstract":"The new generation of large telescopes begins a truly exciting new era for ground-based astronomy. By the end of the decade, nearly a dozen new telescopes with diameter D≥6.5 m will be in operation. Equipped with adaptive optics, these telescopes will provide unprecedented resolution from the ground. The rapid increase in our knowledge of the atmosphere, the refinement of adaptive optics components, and the steady increase in confidence arising from the experience of numerous groups around the world are all coming together at the right time for adaptive optics to fulfill its promise for astronomy.","PeriodicalId":256393,"journal":{"name":"Adaptive Optics","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":"126987605","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}

{"title":"Novel Adaptive Optics with the Durham University ELECTRA System","authors":"D. Buscher, N. Andrews, C. Dunlop, P.W. Morris, R. Myers, R. Sharpies, A. Vick, A. Zadrozny, C. Haniff, R. Wilson","doi":"10.1364/adop.1995.mc2","DOIUrl":"https://doi.org/10.1364/adop.1995.mc2","url":null,"abstract":"We present the status of the Durham University ELECTRA visible-light adaptive optics system and describe novel imaging strategies to be used with this instrument.","PeriodicalId":256393,"journal":{"name":"Adaptive Optics","volume":"6 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":"122035597","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}

{"title":"A Computationally Efficient Method for Wavefront Reconstruction","authors":"S. Browne, J. Vaughn, G. Tyler, J. Gonglewski","doi":"10.1364/adop.1995.tua13","DOIUrl":"https://doi.org/10.1364/adop.1995.tua13","url":null,"abstract":"A fast algorithm for measuring Hartmann spot positions is combined with a computationally efficient reconstructor running on a pair of i860XP processors to achieve 1000 reconstructions per second. The full-featured reconstructor removes unobservable modes, as well as tilt which is handed to a steering min or with high dynamic range. Moreover, the reconstructor can perform much of its processing on the fly while the frame is being transferred from the pupil plane camera, resulting in significantly reduced servo phase lag. Details of the fast reconstructor are described with particular emphasis on the creative use of computational resources.","PeriodicalId":256393,"journal":{"name":"Adaptive Optics","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":"128044359","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}

{"title":"Focault-like Wave-Front Sensor","authors":"A. Riccardi, S. Esposito, R. Ragazzoni, L. Fini, P. Ranfagni","doi":"10.1364/adop.1996.athc.5","DOIUrl":"https://doi.org/10.1364/adop.1996.athc.5","url":null,"abstract":"We present first laboratory results for a focault-like wave-front sensor suitable for adaptive optics systems based on a squared-based refractive pyramid.","PeriodicalId":256393,"journal":{"name":"Adaptive Optics","volume":"45 1 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":"125830318","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}

{"title":"Adaptive Optics Specification for a 10m Telescope on the ORM","authors":"N. Devaney","doi":"10.1364/adop.1996.amb.6","DOIUrl":"https://doi.org/10.1364/adop.1996.amb.6","url":null,"abstract":"The Spanish astronomical community has decided to build a 10m telescope employing a segmented primary mirror in the Observatorio del Roque de los Muchachos (ORM) on the island of La Palma in the Canary Islands. The telescope will incorporate an Adaptive Optics (AO) facility and work is underway to specify the requirements for this system. The AO requirements are being drawn up at this early stage so that they may be taken into account in the detailed optical and mechanical design of the telescope. In particular, the ability to carry out AO at the shortest wavelengths feasable should not be limited by errors in the phasing and tilting of the primary mirror segments. The form of the PSF and the Strehl ratio dependance on these errors is examined by Fourier transforming a simple simulation of the segmented mirror. The simulation includes inter-segment correlation of the piston errors.","PeriodicalId":256393,"journal":{"name":"Adaptive Optics","volume":"48 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":"121969945","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}

{"title":"CRICS - Confusion Rejection Image Compensation System","authors":"A. Wirth, A. Jankevics","doi":"10.1364/adop.1995.tua46","DOIUrl":"https://doi.org/10.1364/adop.1995.tua46","url":null,"abstract":"A novel concept for the compensation of aberrated images has been developed. It is based on the idea of introducing a pupil mask that blocks the most highly tilted portions of the incoming wavefront. Such a mask might consist of a spatial light modulator. The SLM would be driven by a binary Hartmann sensor. Subapertures with low tilt would turn on their corresponding SLM pixels allowing the nearly flat portions of the wavefront to propagate. Subapertures with larger tilts would act to turn off their SLM pixels, eliminating those portions of the pupil that don not contribute to the core of the image.","PeriodicalId":256393,"journal":{"name":"Adaptive Optics","volume":"185 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":"121729419","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}

{"title":"Performance Characterization of High Performance, Low Cost Wavefront Reconstructor System","authors":"S. Rogers, S. McDermott","doi":"10.1364/adop.1996.athc.32","DOIUrl":"https://doi.org/10.1364/adop.1996.athc.32","url":null,"abstract":"Logicon RDA has participated in the Air Force Phillips Laboratory imaging efforts under the direction of Dr. J. Gonglewski during the past years. We just finished supporting an adaptive optics experiment using a 197 actuator deformable mirror that was installed on the 3.5 m telescope located at Starfire Optical Range in Albuquerque NM. The experiment initially called for all centroid and wavefront reconstruction calculations be performed using a CSPI multiple i860 processor board. It was quickly determined that the resulting bandwidth would be insufficient to support the experiment objectives so Logicon RDA was tasked with designing and implementing a hardware based centroid and wavefront reconstructor.\u0000 A deformable mirror with a large number of actuators and a requirement for high speed control leads towards the current trend to dedicate a single processing element per actuator. While this allows flexible control with enhanced diagnostic capabilities, the size and complexity of the system increases as does the number of interfaces. Our approach, to quickly provide the needed bandwidth for this experiment, was to use a small number of inexpensive parallel processing paths that are capable of keeping up with the camera frame rate of 1000 fps. This reduced the size of our system (3, 6U VME boards) and kept the number of interfaces to a manageable number.\u0000 The centroid areas used for each actuator are completely reconfigurable (size and location) via the host processor as is the matrix used to reconstruct the wavefront. The matrix multiply is a brute force approach with no shortcuts implemented allowing the user to tailor the matrix to account for local effects if needed.\u0000 We believe that our approach is an inexpensive method to control a medium sized deformable mirror (up to 500 actuators) running at frame rates of up to 2000 fps.\u0000 We discuss the processing system configuration, the methods used to predict and measure the performance of the Deformable Mirror system, actual system performance results and show a cost breakdown and photographs of the centroid calculator and the wavefront reconstructor.","PeriodicalId":256393,"journal":{"name":"Adaptive Optics","volume":"24 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":"121751590","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}

{"title":"Imaging by Low order Adaptive Optics","authors":"M. Holohan, M.L O’hUallacháin","doi":"10.1364/adop.1995.tua14","DOIUrl":"https://doi.org/10.1364/adop.1995.tua14","url":null,"abstract":"As the use of optics in industrial and medical applications becomes more widespread the problems of maintaining desired optical properties during transmission through turbulent media has come to the fore. Much work has been done modelling optical transmission through such media [1, 2]. Adaptive optics (AO) is the name given to systems which continually monitor the incoming light and attempt to maintain the beam or image quality. The need for low cost adaptive optics will only grow as new applications develop.","PeriodicalId":256393,"journal":{"name":"Adaptive Optics","volume":"5 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":"124770113","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}

{"title":"High Speed Micro-Machine Device for Adaptive Correction of Aero-Optic Effects","authors":"R. Clark, J. Karpinsky, G. Borek, Eric T. Johnson, N. Clark","doi":"10.1364/adop.1995.thb6","DOIUrl":"https://doi.org/10.1364/adop.1995.thb6","url":null,"abstract":"Current adaptive optical 1 systems which provide wavefront correction operate at or below 100 Hz, a frequency response suitable for correcting atmospheric effects for such applications as ground-based astronomy1. These systems are limited to such low frequency operating bandwidths by the speed of the processing and drive electronics, and the large, slow, deformable mirror devices utilized by these system designs. SY Technology, Inc. has developed a micro-machine based, high frequency, adaptive device which, when inserted into the proposed interferometric design, will have the potential to correct wavefronts at frequencies of hundreds of kilohertz2. This tremendous bandwidth is achieved by a device fabricated using photolithographic techniques, with its drive electronics controlled through light-addressed circuitry (see Figure 1). In this paper, a closed-loop adaptive, interferometric micro-machine device to correct for aero-optic effects is described and demonstrated3.","PeriodicalId":256393,"journal":{"name":"Adaptive Optics","volume":"26 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":"125053199","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}