Incoherent digital holographic spectral imaging with high accuracy of image pixel registration

• 作者: Feng-Ying Ma Xi Wang Yuan-Zhuang Bu Yong-Zhi Tian Yanli Du Qiao-Xia Gong Ceyun Zhuang Jinhai Li Lei Li
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: ELECTROMAGNETISM,OPTICS,ACOUSTICS,HEAT TRANSFER,CLASSICAL MECHANICS,AND FLUID DYNAMICS
• 页码范围: 271-278
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1056/abd2aa

摘要

Fresnel incoherent correlation holography(FINCH)is a unique three-dimensional(3D)imaging technique which has the advantages of scanning-free,high resolution,and easy matching with existing mature optical systems.In this article,an incoherent digital holographic spectral imaging method with high accuracy of spectral reconstruction based on liquid crystal tunable filter(LCTF)and FINCH is proposed.Using the programmable characteristics of spatial light modulator(SLM),a series of phase masks,none of whose focal lengths changes with wavelength,is designed and made.For each wavelength of LCTF output,SLM calls three phase masks with different phase constants at the corresponding wavelength,and CCD records three holograms.The spectral images obtained by this method have a constant magnification,which can achieve pixel-level image registration,restrain image registration errors,and improve spectral reconstruction accuracy.The results show that this method can not only obtain the 3D spatial information and spectral information of the object simultaneously,but also have high accuracy of spectral reconstruction and excellent color reproducibility.