在收集完图片之后，我们要对图片进行ctf修正，还原它在各个分辨率的衬度。程序的实现方法就是，对图片做傅里叶变换，用公式来拟合它的衬度变化，找到该图的CTF曲线。

2021年2月1日 · In this paper, the contrast transfer and noise properties of ptychography are explored in order to minimise the electron dose needed to obtain high-quality phase …

The contrast transfer function (CTF) describes the aberrations of the objective lens in HRTEM and how the condenser system shapes the probe in STEM. Here we describe how to create a CTF …

The Contrast Transfer Function (CTF) describes the aberrations of the objective lens in HRTEM and specifies how the condenser system shapes the probe in STEM. Here we describe how to …

Example plots of PSF and CTF are shown for optimum (9.6 mrad) and spherical aberration limited (13 mrad) conditions in Fig. 4. The optimum defocus for 9.6 mrad (∆fopt ~ 500 Å) generates a …

CTF Function of a CM300 Microscope damped by temporal and spatial envelope functions. The envelope function represents the effect of additional aberrations that damp the contrast …

The contrast transfer function (CTF) describes the aberrations of the objective lens in HRTEM and specifies how the condenser system shapes the probe in STEM. abTEM implements phase …

2020年7月30日 · The exCTF simulator not only calculates the CTF for basic optical information that can be obtained in conventional TEM, but also can calculate the extended CTF with …

The most important optical factor in achieving the optimum probe profile is the radius of the probe-forming aperture, which determines the convergence semi-angle of the illumination. Small …

2024年12月20日 · This valuable work presents the latest version of CTFFIND, which is the most popular software for determination of the contrast transfer function (CTF) in cryo-electron …