diff --git a/Absorption-Imaging-Class.md b/Absorption-Imaging-Class.md
index 727227a..de6b565 100644
--- a/Absorption-Imaging-Class.md
+++ b/Absorption-Imaging-Class.md
@@ -11,7 +11,11 @@ This is a class for getting data of absorption imaging form three standard image
 ## absorption_imaging.\_\_init\_\_
 > dylab.absorption_imaging(data_path, camera_orientation, camera_label, transition=None, camera=None, detuning=None, intensity=None)
 
-Initialization function of the absorption imaging class. The path of those three standard pictures should be "camera_orientation\camera_label". The defult name of them are "atoms", "background" and "dark". If you would like to change their name for different configuration, plase use function **absorption_imaging.set_image_name()**
+Initialization function of the absorption imaging class. 
+
+The path of those three standard pictures should be "camera_orientation\camera_label". The defult name of them are "atoms", "background" and "dark". If you would like to change their name for different configuration, plase use function **absorption_imaging.set_image_name()**
+
+Just for get the absorption imaging, it doesn't require any information about camera and transition. But any further calculation, it has to call "transition" and "camera"
 
 ### Parameters:
 * **data_path** *(unknown, necessary)*: The path of hdf5 file provided by lyse moduel in LabScript.
@@ -19,4 +23,5 @@ Initialization function of the absorption imaging class. The path of those three
 * **camera_label** *(string, necessary)*: Name of the imaging group in hdf5 file.
 * **transition** *(objet of class dylab.TransitionClass.Transition, optional)*: A constant dictionary class storing the information of transition.
 * **camera** *(object of class dylab.Camera.\*, optional)*: A constant dictionary class storing the information of camera.
-* **detuning** *()*
\ No newline at end of file
+* **detuning** *(float, optional)*: Detuning of the laser beam.
+* **Intensity** *(float, optional)*: Laser beam intensity at the position of atom cloud!
\ No newline at end of file