Fresnel incoherent correlation holography (FINCH) is a self-interference incoherent digital holography technique. It possesses a higher lateral resolution than an equivalent incoherent imaging system. However, FINCH has lower axial resolution than the direct imaging systems with the same numerical aperture. A decade after the FINCH invention, a different incoherent holographic method named coded aperture correlation holography (COACH) was developed with improved axial resolution but with the same lateral resolution as direct imaging. In this study, we propose and demonstrate a variant of COACH called coded aperture with FINCH intensity responses (CAFIR) with an improved lateral resolution that is similar to the FINCH system while maintaining its high axial resolution similar to the direct imaging system. CAFIR is implemented with coded phase masks to generate an ensemble of quasi-randomly distributed FINCH-like responses. Point spread holograms and object holograms are recorded under identical conditions, and they are cross-correlated to obtain the image reconstruction. Imaging of a multiplane object is studied to compare the axial resolution of CAFIR with FINCH and direct imaging systems.

中文翻译：

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编码孔径相关全息 (COACH) 具有优异的 FINCH 横向分辨率和传统直接成像系统的轴向分辨率

菲涅尔非相干相关全息（FINCH）是一种自干扰非相干数字全息技术。它具有比等效的非相干成像系统更高的横向分辨率。然而，与具有相同数值孔径的直接成像系统相比，FINCH 的轴向分辨率较低。FINCH 发明十年后，开发了一种不同的非相干全息方法，称为编码孔径相关全息 (COACH)，其轴向分辨率有所提高，但横向分辨率与直接成像相同。在这项研究中，我们提出并展示了一种称为编码孔径与 FINCH 强度响应 (CAFIR) 的 COACH 变体，具有类似于 FINCH 系统的改进横向分辨率，同时保持其类似于直接成像系统的高轴向分辨率。CAFIR 使用编码相位掩码实现，以生成一组准随机分布的 FINCH 类响应。点扩散全息图和物体全息图在相同条件下记录，通过互相关得到图像重建。研究了多平面物体的成像，以比较 CAFIR 与 FINCH 和直接成像系统的轴向分辨率。