Fabrication of multi-wavelength visible and infrared filter for solar atmosphere tomographic imaging

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2017,（12）
• 页码范围: 86-90
• 页数: 5页
• 语种: 英文
• DOI: 10.3788/COL201715.123101

摘要

To simultaneously obtain high-resolution multi-wavelength (from visible to near infrared) tomographic images of the solar atmosphere,a high-performance multi-wavelength optical filter has to be used in solar imaging telescopes.In this Letter,the fabrication of the multi-wavelength filter for solar tomographic imaging is described in detail.For this filter,Ta2O5 and SiO2 are used as high-and low-index materials,respectively,and the multilayer structure is optimized by commercial Optilayer software at a 7.5° angle of incidence.Experimentally,this multi-wavelength optical filter is prepared by a plasma ion-assisted deposition technique with optimized deposition parameters.High transmittance at 393.3,396.8,430.5,525,532.4,656.8,705.8,854.2,1083,and 1565.3 nm,as well as high reflectance at 500 and 589 nm are achieved.Excellent environmental durability,demonstrated via temperature and humidity tests,is also established.