Update About

About.md

@@ -1,41 +1,46 @@
 [Home page](ptychoScopy)
 
-##  Formulas
-#####  Reconstruction probe window
-is given by
+## Formulas
 
+Several restrictions and limitations described are based on comparison of set values with calculated limits. These are based on following formulas.
+
+##### Reconstruction probe window
+
+Electron probe shape can be reconstructed during iterative reconstruction, but its size (probe window) is limited by
 
 ```math
 w_{full} = \frac{\lambda \cdot CL_{eff}}{d_{eff}} [reference?]
 ```
-where $`\lambda`$ is electron wavelength, $`CL_{eff}`$ the effective detector camera length and $`d_{eff}`$ the  effective real space pixel size (including binning). $`w_{semi}`$ is then defined as $`w_{full}/2`$.
 
+where $`\lambda`$ is electron wavelength, $`CL_{eff}`$ the effective detector camera length and $`d_{eff}`$ the effective real space pixel size (including binning). $`w_{semi}`$ is then defined as $`w_{full}/2`$.
+
+##### Maximal usable defocus
 
-#####  Maximal usable defocus
 is given by
 
-
 ```math
 \Delta f_{max} = \frac{w_{semi}  - r_{0}}{\tan \alpha_{corr}} [to test]
 ```
+
 where $`w_{semi}`$ is probe semi-window, $`r_{0}`$ the beam radius with 0 defocus and $`\alpha_{corr}`$ the real probe semi-angle.
 
-#####  Pixel size in the reconstructed image
+##### Pixel size in the reconstructed image
+
 is given by
 
 ```math
 pix_{ptycho} = \frac{lambda CL_{eff}}{N_{eff}d_{eff}} [reference]
 ```
+
 where $`\lambda`$ is electron wavelength, $`CL_{eff}`$ the effective detector camera length, $`N_{eff}`$ the number of effective pixels and $`d_{eff}`$ the effective real space pixel size.
 
-
-
 ## Tested packages
+
 Proper widgets layout was tested in JupyterLab 4.0.8 and Python 3.11.5. The code was tested with packages:
 
-- Numpy version  1.26.2
-- Scipy version  1.11.4
-- Plotly version  5.18.0
-- Pandas version  2.1.1
-- IPython version  7.31.1
-- Ipywidgets version  8.0.4
+- Numpy version 1.26.2
+- Scipy version 1.11.4
+- Plotly version 5.18.0
+- Pandas version 2.1.1
+- IPython version 7.31.1
+- Ipywidgets version 8.0.4