Hard X-ray Holographic Microscope for 3D Phase Reconstruction of Semitransparent Object

用于半透明物体 3D 相位重建的硬 X 射线全息显微镜

• 批准号: 12450037
• 负责人: WATANABE Norio
• 金额: $ 8.9万
• 依托单位: University of Tsukuba
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12450037/
• 关键词: X-ray holography; Fourier transform holography; Gabor holography; X-ray microscope; Synchrotron radiation; Zone plate; Phase-contrast; X線; ホログラフィー; 顕微鏡; ウォルターミラー

Gabor and lens-less Fourier transform holographic microscopes have been developed for the purpose of (a) high-resolution phase-contrast imaging, (b) quantitative phase imaging, and (c) 3D phase reconstruction. A combination of the x-ray undulator source of SPring-8 and a high-resolution zone plate enabled us to make a secondary coherent source as small as 100 nm size. Then, a tantalum line and space pattern as fine as 100 nm could be resolved both Gabor and lens-less Fourier transform holography at 10 keV. This is the highest resolution that has been reported in hard x-ray holography. The image of the lens-less Fourier transform holography was edge-enhanced one because the central region of the hologram had to be blocked. For quantitative phase imaging, a lens-less Fourier transform holographic microscope with a double zone plate interferometer was newly developed. Not only the edge pattern but also the inside flat field of a tantalum pattern could be reconstructed. Using this optical system, projection data for 3D phase tomography could be recorded and the reconstruction is currently under way. A Zernike-type hard x-ray phase-contrast microscope was also developed at the Photon Factory. A tantalum line and space pattern as fine as 100 nm could be clearly resolved at 9 keV.To make a ID small x-ray source, total reflection from a limited mirror surface was also investigated. The reduction of the secondary source size was confirmed from the Gabor hologram of a gold wire illuminated with the reflected x-rays at 8 keV. This method can be used to make a small reference source of holography, the size of which determines the spatial resolution.

Gabor和无透镜傅里叶变换全息显微镜已被开发用于(A)高分辨率相位对比度成像、(B)定量相位成像和(C)3D相位重建。SPRING-8的x射线波荡器源和高分辨率波带片的组合使我们能够制作尺寸为100 nm的二次相干源。在10keV电压下，利用Gabor全息术和无透镜傅里叶变换全息术都可以分辨出高达100 nm的钽线条和空间图案。这是已报道的硬x射线全息术中的最高分辨率。无透镜傅里叶变换全息术的图像是边缘增强的，因为全息图的中心区域必须被遮挡。为了实现定量位相成像，新研制了一种无透镜傅里叶变换全息显微镜和双波带板干涉仪。不仅可以重建钽图案的边缘图案，还可以重建其内部平坦场。利用该光学系统，可以记录三维相位层析成像的投影数据，目前正在进行重建。光子工厂还研制了一台Zernike型硬X射线相差显微镜。在9keV下，可以清晰地分辨出高达100 nm的钽线和空间图案。为了制作一个ID小X射线源，我们还研究了有限镜面的全反射。用8keV反射X射线照射金丝的Gabor全息图证实了次级源尺寸的减小。这种方法可以制作一个小的全息照相参考源，其大小决定了空间分辨率。

项目成果

N.Watanabe et al.: "Hard X-ray Fourier Transform Holography with Zone Plates"AIP Conf.Proc.. 705(in press).

N.Watanabe 等人：“带波带板的硬 X 射线傅里叶变换全息术”AIP Conf.Proc.. 705（印刷中）。

H.Yokosuka et al.: "Phase-contrast hard X-ray microscope with a zone plate at the Photon Factory"J.Phys.IV France. 104. 591-594 (2003)

H.Yokosuka 等人：“光子工厂配备波带板的相衬硬 X 射线显微镜”J.Phys.IV France。

N.Watanabe, S.Aoki: "X-Ray Microscope with a Wolter Mirror"International Progress on Advanced Optics and Sensors, Proceedings of International Workshop on Extreme Optics and Sensors (eds. H.Ohmori, H.M.Shimizu). (Universal Academic Press, Tokyo). 135-142

N.Watanabe、S.Aoki：“带 Wolter 镜的 X 射线显微镜”先进光学和传感器的国际进展，极端光学和传感器国际研讨会论文集（H.Ohmori、H.M.Shimizu 编）。

N.Watanabe et al.: "Optical holography in the hard X-ray domain"J.Phys.IV France. 104. 551-556 (2003)

N.Watanabe 等人：“硬 X 射线领域的光学全息术”J.Phys.IV France。

渡辺 紀生et al.: "X線ホログラフィーの現状"放射光. 16. 345-351 (2003)

Norio Watanabe 等人：“X 射线全息术的现状”同步辐射。16. 345-351 (2003)