WISHED: Wavefront imaging sensor with high resolution and depth ranging
WISHED: Wavefront imaging sensor with high resolution and depth ranging
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DOI：
10.1109/iccp48838.2020.9105280
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发表时间：
2020-04
期刊：
影响因子：
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通讯作者：
Yicheng Wu;Fengqiang Li;F. Willomitzer;A. Veeraraghavan;O. Cossairt
中科院分区：
文献类型：
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作者：
Yicheng Wu;Fengqiang Li;F. Willomitzer;A. Veeraraghavan;O. Cossairt
基于相位恢复的波前传感器已经被证明可以从具有高空间分辨率的物体重建复场。虽然重建的复场编码的对象的深度信息，它是不切实际的被用作深度传感器的宏观对象，因为明确的深度成像范围是有限的光波长。为了提高成像的深度范围和处理深度不连续性，我们提出了一种新的三维传感器，利用波长多样性和波前传感。记录两个光波长的复杂场，通过关联这些波前可以产生合成波长。该系统实现了高的横向和深度分辨率。我们的实验原型显示出比光波长大1,000倍以上的清晰范围，而平滑物体的深度精度高达9微米，粗糙物体的深度精度高达69微米。我们的实验演示了3D重建透明，半透明，不透明的物体光滑和粗糙的表面。
Phase-retrieval based wavefront sensors have been shown to reconstruct the complex field from an object with a high spatial resolution. Although the reconstructed complex field encodes the depth information of the object, it is impractical to be used as a depth sensor for macroscopic objects, since the unambiguous depth imaging range is limited by the optical wavelength. To improve the depth range of imaging and handle depth discontinuities, we propose a novel three-dimensional sensor by leveraging wavelength diversity and wavefront sensing. Complex fields at two optical wavelengths are recorded, and a synthetic wavelength can be generated by correlating those wavefronts. The proposed system achieves high lateral and depth resolutions. Our experimental prototype shows an unambiguous range of more than 1,000 x larger compared with the optical wavelengths, while the depth precision is up to 9µm for smooth objects and up to 69µm for rough objects. We experimentally demonstrate 3D reconstructions for transparent, translucent, and opaque objects with smooth and rough surfaces.