Hybrid imaging of optical aberration imagery with random wave-front coding

作者：Luo Lin^*; Gao Xiao Rong; Wang Ze Yong; Wang Li

来源：Acta Armamentarii, 2011, 32(7): 827-831.

• Aberration compensation
• Blind deconvolution
• Conjugate gradient optimization
• Decoded images
• Decoding algorithm
• Diffraction limited
• Frequency domains
• Gradient optimization
• High-resolution imaging
• Image detector
• Imaging quality
• Intermediate image
• Laboratory experiments
• Laser speckle interference
• Light path
• Optical aberration
• Random phase masks
• Random waves
• Wave front coding

A hybrid imaging was investigated to remove the optical aberrations by random wave front coding and digital image processing. The random phase mask made of laser speckle interference was placed in light path before the optical system image detector to change aberration image into random encoding intermediate image, and the optical deterministic aberrations was submerged in random encoding, so weakened. The blind deconvolution decoding algorithm based on frequency-domain conjugate gradient optimization was established for decoding intermediate image into no aberrations image. Due to using the frequency domain gradient optimization, the decoded image speed is improved. The influence of symmetrical, asymmetric and mixed aberrations, etc on encoding imaging was analyzed. Also the ability of noise inhibiting of encoding imaging is shown. The computer simulation and laboratory experiment were done, the results show that the proposed method can effectively eliminate optical system aberrations, reduce the noise, improve the imaging quality, and have resolution of optical system reach the diffraction limited level.

• 出版日期2011
• 单位西南交通大学