{"id":10349,"date":"2022-09-17T13:49:18","date_gmt":"2022-09-17T13:49:18","guid":{"rendered":"https:\/\/www.szlaser.com\/?page_id=10349"},"modified":"2022-09-18T06:49:35","modified_gmt":"2022-09-18T06:49:35","slug":"ar-coating","status":"publish","type":"page","link":"https:\/\/www.szlaser.com\/index.php\/wiki\/ar-coating\/","title":{"rendered":"What is AR Coating"},"content":{"rendered":"

What is AR Coating?<\/h1><\/h1><\/div>

The principle of reducing reflection and increasing transmission of light works due to the \u201cinterference\u201d phenomenon. In the visible spectrum range, each surface of an optical glass element reflects about 4% energy; thus, if 100% energy enters the first surface, about 92% comes out of the second surface.
\nThis is bad for optics. Table below shows two examples of what happens if more elements (and more surfaces) are in the optical assembly.<\/p>\n\n

\n \n\n \n \n \n \n
\n number of surface and energy losses <\/td>\n <\/tr>\n
\n n <\/td>\n \n 1 <\/td>\n \n 2 <\/td>\n \n 4 <\/td>\n \n 6 <\/td>\n \n 8 <\/td>\n \n 10 <\/td>\n \n 12 <\/td>\n \n 14 <\/td>\n <\/tr>\n
\n 1.5 <\/td>\n \n 4.00 <\/td>\n \n 7.84 <\/td>\n \n 15.07 <\/td>\n \n 21.72 <\/td>\n \n 27.86 <\/td>\n \n 33.52 <\/td>\n \n 38.73 <\/td>\n \n 43.53 <\/td>\n <\/tr>\n
\n 1.7 <\/td>\n \n 6.72 <\/td>\n \n 12.99 <\/td>\n \n 24.29 <\/td>\n \n 34.13 <\/td>\n \n 42.69 <\/td>\n \n 50.13 <\/td>\n \n 56.61 <\/td>\n \n 62.25 <\/td>\n <\/tr>\n <\/table>\n<\/div>