Hi Aabid Baba
As far as the most authentic link in regards to this is concerned i would suggest you to opt for symbols that are from optical society as they are most standard but as far as i know they are offering a paid subscription. I am posting link for that as well and another link that has some free symbols but um not sure whether that is authentic enough.
http://www.gwoptics.org/ComponentLibrary/
https://www.physicsforums.com/threads/standard-optical-component-symbols.624032/
https://www.osapublishing.org/viewmedia.cfm?uri=opn-3-9-47
Regards
Burhan