diff --git a/Absorption-Imaging-Class.md b/Absorption-Imaging-Class.md
index a522a77..727227a 100644
--- a/Absorption-Imaging-Class.md
+++ b/Absorption-Imaging-Class.md
@@ -16,4 +16,7 @@ Initialization function of the absorption imaging class. The path of those three
 ### Parameters:
 * **data_path** *(unknown, necessary)*: The path of hdf5 file provided by lyse moduel in LabScript.
 * **camera_orientation** *(string, necessary)*: Name of the camare group in hdf5 file.
-* **camera_label** *(string, necessary)*: Name of the imaging group in hdf5 file.
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+* **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** *()*
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