Magnifiers for Craft Work, Reading Magnifier with LED ... - magnifier for crafting
Central obstruction
Tyler, G. A., Turbulence-induced adaptive-optics performance degradation: evaluation in the time domain, J. Opt. Soc. Am. A, 1, (1984) 251–262
Strehl ratio is an important performance measure for adaptive-optics systems. Its calculation is more complicated than that of variances. Nevertheless, it is shown below that one can obtain exact expressions for the Strehl ratio for propagation through uncorrected turbulence, and through turbulence for which all modes except tilt have been corrected. Asymptotic expressions are also obtained that apply when the distortion is high.
strehlratio中文
Sasiela, R.J. (1994). Strehl Ratio. In: Electromagnetic Wave Propagation in Turbulence. Springer Series on Wave Phenomena, vol 18. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-85070-7_8
Cole, A. E., Court, A., Kantor, A. J., Handbook of Geophysics and Space Environments, Edited by Valley, Shea L, McGraw-Hill Book Company, Inc., New York, 1965
Strehl ratioZemax
Belsher, J., Fried, D., Chromatic Refraction Induced Pseudo Anisoplanatism, tOSC Report No. TR-433 (the Optical Sciences Company, Placentia, California, 1981)
Tyler, G., Belsher, J., Fried, D., Amelioration of Chromatic Refraction Induced Pseu-doanisoplanatism, tOSC Report No. TR-465 (the Optical Sciences Company, Placentia, California, 1982)