Deletion of Celor lens

Comment: appears to be a notable lens design. Dedicated book chapter http://www.optics.ntut.edu.tw/bin/downloadfile.php?file=WVhSMFlXTm9Mekk1TDNCMFlWOHhNalV5TVY4Mk5URTVNRFE1WHpBeU1qUXpMbkJrWmc9PQ==&fname=UTJWc2IzSWdUR1Z1Y3k1d1pHWT0=,  few sentences in another book https://books.google.pl/books?id=HY-GDAAAQBAJ&q=%22celor+lens%22#v=snippet&q=%22celor%20lens%22&f=false, and more https://books.google.com/books?id=fcEWAQAAMAAJ&q=%22celor+lens%22&dq=%22celor+lens%22&hl=en&sa=X&ved=0ahUKEwid4YK1ne3VAhUjD5oKHQShBxwQ6AEIQTAF. Lack of references is not a reason for deletion. The requirement is |verifiability not verification
Stance: keep
Cited policy: Wikipedia:Verifiability (WP:V)