CTF，全称contrast transfer function , 衬度 转换 函数 。 是 电子显微镜 拍摄的图片的一个特有的特征，我们在拍摄完TEM照片之后要对照片作ctf修正。 本文主要阐述一下我自己本人对ctf的一 …

The contrast transfer function (CTF) mathematically describes how aberrations in a transmission electron microscope (TEM) modify the image of a sample. [1][2][3][4] This contrast transfer …

这里我们用一个函数来描述不同频率分量在像平面的强度—— 衬度传递函数 （Contrast transfer function，CTF）或者 强度传递函数 （Intensity transfer function，ITF）。 图1所示为TEM成 …

The Contrast Transfer Function (CTF) models the effect of defocus and microscope aberrations on single particle images. These effects must be corrected before the images can be used to …

a simplified form of the CTF function can be derived. The phase shift ( r ) from a weak phase object is small, and the wave expression exp [ i ( r )] can be approximated by the series

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 …

2015年11月1日 · The contrast transfer function (CTF) describes an undesirable distortion of image data from a transmission electron microscope. Many users of full-featured processing …

The contrast transfer function (CTF) is a mathematical description of the imaging process in the TEM (Erickson and Klug, 1970), expressed in Fourier space. Ideally, TEM images would …

More details about the CTF 1. Electrons have really short wavelengths, and they travel through the column one by one. 2. The contrast in the image of a grating object varies with the amount …

2025年3月25日 · The contrast transfer function CTF (detailed treatment), sin χ (k), gives the phase changes of diffracted beams with respect to the direct beam.