Instrumentation, Techniques, and Measurement

Isoplanatic angle in finite distance: experimental validation

[+] Author Affiliations
Long-Kun Yu, Zai-Hong Hou, Shou-Chuan Zhang, Xu Jing, Yi Wu

Chinese Academy of Sciences, Anhui Institute of Optics and Fine Mechanics, Key Laboratory of Atmospheric Composition and Optical Radiation, Hefei 230031, China

Opt. Eng. 54(2), 024105 (Feb 17, 2015). doi:10.1117/1.OE.54.2.024105
History: Received October 19, 2014; Accepted January 23, 2015
Text Size: A A A

Abstract.  Through theoretical analysis, we have previously proposed a method to measure an isoplanatic angle over a finite distance using three receiver apertures and a synthetic point source. Here, we present the validation experiment for this method. Through careful experimental design, the atmospheric coherence length for spherical waves propagating in the opposite direction was measured and converted to an isoplanatic angle as the true value for comparison. In general, the direct measurement of an isoplanatic angle agrees well with the true value in clear-air periods. Experimental results confirm our method for measuring an isoplanatic angle over a finite distance. The experiment resulted in the first time-diagram of an isoplanatic angle in finite distance ever measured through spherical-wave scintillation.

Figures in this Article
© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Long-Kun Yu ; Zai-Hong Hou ; Shou-Chuan Zhang ; Xu Jing and Yi Wu
"Isoplanatic angle in finite distance: experimental validation", Opt. Eng. 54(2), 024105 (Feb 17, 2015). ; http://dx.doi.org/10.1117/1.OE.54.2.024105


Tables

Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.