Author(s)

Lianhui Zheng^1,2,3,4*, Changhui Rao^1,4, Naiting Gu^1,4, Qi Qiu²

¹Key Laboratory of Adaptive Optics, Chinese Academy of Sciences, Chengdu, China.
²School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu, China.
³University of Chinese Academy of Sciences, Beijing, China.
⁴Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu, China.

The solar grating spectrometer is an essential tool to study the thermodynamics properties of the solar atmosphere with different height distributions, but its imaging performance will be degraded by the wavefront aberration generalized by the atmospheric turbulence. On the other hand, the narrow slit of the grating spectrometer will filter the wavefront aberration to some extent. The influence of the filter slit on the wavefront aberration and the correction requirement of the adaptive optics are analyzed theoretically and experimentally. We demonstrate that the influence of filter slit on the different types and magnitudes of wavefront aberration is different, and the RMS value of the wavefront aberration less than 0.3λ is down to below almost 60% after the filter slit, and it can lower the correction range requirement of the adaptive optics. The numerical simulation and experiment results show that: after the adaptive optics correction, the influence of the wavefront aberration on the spectral resolution is neglected, and the energy utilization is considerably improved; both numerical simulation and experiment results are in good agreement.

Solar Atmosphere, Aberration, Adaptive Optics, Prototype, Spectral Resolution

Zheng, L. , Rao, C. , Gu, N. and Qiu, Q. (2015) The Influence of Filter Slit on the Imaging Performance of the Solar Grating Spectrometer Based on Adaptive Optics. Optics and Photonics Journal, 5, 303-311. doi: 10.4236/opj.2015.510028.