A device and method for measuring atmospheric optical turbulence profile based on telescope focal plane ring image

Jiaxin Li; Hualin Chen; Hua Bai; Chong Pei; Ying Fu

doi:10.1117/12.3020999

11 September 2024 A device and method for measuring atmospheric optical turbulence profile based on telescope focal plane ring image

Jiaxin Li, Hualin Chen, Hua Bai, Chong Pei, Ying Fu

Author Affiliations +

Proceedings Volume 13094, Ground-based and Airborne Telescopes X; 130945I (2024) https://doi.org/10.1117/12.3020999
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

The study introduces a technique and apparatus for assessing the atmospheric optical turbulence profile, utilizing the ring image obtained at the focal plane of a telescope fitted with a cone lens. Positioning of the cone lens is possible either ahead of the telescope or its focal plane, with the first option providing an expanded field of view and enhanced imaging efficiency. The algorithmic software analyzes the achromatic ring image from this optical arrangement to determine angular frequency signals indicative of wavefront scintillation. Subsequently, these signals facilitate the derivation of statistical data essential for analyzing turbulence, simultaneously forming a theoretical formula for the weight function that elucidates their correlation with turbulence. Inversion is used to restore the turbulence profile, by analyzing the link between the wavefront scintillation signal's angular power spectrum and the turbulence's intensity and weight function at a certain altitude. Remarkably, the suggested optical apparatus shows an absence of chromatic aberration throughout its full spectral span (400-1000nm). Given that the achromatic annular image's imaging surface aligns with the telescope's focal plane and the lens barrel is made of carbon fiber, the ring image's image quality remains unaffected by significant temperature variations, eliminating the necessity for additional focusing equipment. This method provides an economical solution with an uncomplicated hardware framework that is straightforward to set up and modify.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Jiaxin Li, Hualin Chen, Hua Bai, Chong Pei, and Ying Fu "A device and method for measuring atmospheric optical turbulence profile based on telescope focal plane ring image", Proc. SPIE 13094, Ground-based and Airborne Telescopes X, 130945I (11 September 2024); https://doi.org/10.1117/12.3020999

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available