MongoDB Filter without being case sensitive

I would like to search in field Suchname or Note.
Searchterm is “adam”
How to find even records with Adam?

http://xxx.xxx.xxx.xxx/api/v2/mongodb/_table/TelefonNotiz?
filter(Suchname%20like%20%22%25adam%25%22)or(Note%20like%20%22%25adam%25%22)