A new evaluation method for the detecting ability of a telescope

Bi-Tao Tan; Hang Yin; Peng Zhang; Gao-Xing Li

doi:10.1117/12.2648216

14 October 2022 A new evaluation method for the detecting ability of a telescope

Bi-Tao Tan, Hang Yin, Peng Zhang, Gao-Xing Li

Proceedings Volume 12343, 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022); 123430S (2022) https://doi.org/10.1117/12.2648216
Event: 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022), 2022, Qingdao, China

Abstract

The Modulation Transfer Function (MTF) is an analysis method of a telescope in the frequency regime, which can estimate the telescope imaging effect through spatial resolution power. Traditional detecting ability studies on a telescope is based on the signal-to-noise ratio (SNR). This cannot analyze the factors affecting detection ability and spatial resolution simultaneously, such as the atmospheric coherence length, the image motion and the aberrations. A new method on the detecting ability evaluation of a telescope is presented in this article, which is based on SNR and MTF. It can compensate for the deficiency of the traditional evaluation method, and can analyze the effective of image motion, aberrations and atmospheric coherence length. It can also be used to analyze a telescope with an adaptive optics system. The simulation results indicate that the detecting ability of a telescope is influenced serious by an image motion, some aberrations or the atmospheric coherence length. The detecting ability reduces about 0.5 magnitudes by image motion, which can improve 1 magnitude through an adaptive optics technology.

Citation Download Citation

Bi-Tao Tan, Hang Yin, Peng Zhang, and Gao-Xing Li "A new evaluation method for the detecting ability of a telescope", Proc. SPIE 12343, 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022), 123430S (14 October 2022); https://doi.org/10.1117/12.2648216

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KEYWORDS

Telescopes

Modulation transfer functions

Adaptive optics

Atmospheric sensing

Atmospheric optics

Charge-coupled devices

Signal to noise ratio

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