diff --git a/Absorption-Imaging-Class.md b/Absorption-Imaging-Class.md
index 544e80b..f1c4dfc 100644
--- a/Absorption-Imaging-Class.md
+++ b/Absorption-Imaging-Class.md
@@ -8,4 +8,6 @@ This is a class for getting data of absorption imaging form three standard image
 | absorption_imaging.get_atom_number | Calculte the atom number accoring to the absorption imaging |
 | absorption_imaging.plot_result | Ploting the result |
 
-dylab.absorption_imaging(self, data_path, camera_orientation, camera_label, transition=None, camera=None, detuning=None, intensity=None)
\ No newline at end of file
+### absorption_imaging.\_\_init\_\_
+dylab.absorption_imaging(data_path, camera_orientation, camera_label, transition=None, camera=None, detuning=None, intensity=None)
+* data_path
\ No newline at end of file