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oe1(光电查) - 科学论文

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?? 中文（中国） ▾

  • Resolution-enhanced imaging using interferenceless coded aperture correlation holography with sparse point response

    摘要： interferenceless coded aperture correlation holography (i-coAcH) is a non-scanning, motionless, incoherent digital holography technique. in this study we use a special type of i-coAcH in which its point spread hologram (pSH) is ensemble of sparse dots. With this pSH an imaging resolution beyond the classic diffraction limit is demonstrated. This resolution improvement is achieved due to the position of the coded aperture between the object and the lens-based imaging system. the coded aperture scatters part of the light, that otherwise is blocked by the system aperture, into the optical system, and by doing that, extends the effective numerical aperture of the system. The use of sparse PSH increases the signal-to-noise ratio of the entire imaging system. A lateral resolution enhancement by a factor of about 1.6 was noted in the case of I-COACH compared to direct imaging.

    关键词： resolution enhancement,signal-to-noise ratio,interferenceless coded aperture correlation holography,incoherent digital holography,sparse point response

    更新于2025-09-23 15:19:57

  • Single-shot Fresnel incoherent digital holography based on geometric phase lens

    摘要： Single-shot and incoherent imaging are two important properties of digital holography that can extend its application range. In this study, a simple, compact, in-line Fresnel incoherent digital holographic recording system is proposed that is capable of single-shot and three-dimensional imaging. A geometric phase lens is used as the common-path beam splitter based on its special wave separation property. Parallel phase-shifting holography is used to achieve single-shot operation with the use of a polarization imaging camera together with space-division multiplexing. The capabilities of the proposed technique are experimentally confirmed by imaging two standard test charts based on a compact setup.

    关键词： incoherent digital holography,Single-shot,three-dimensional imaging,Parallel phase-shifting method,space-division multiplexing,geometric phase lens

    更新于2025-09-12 10:27:22