{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Simplified method of tracing rays through any optical system of lenses, prisms, and mirrors","author_name":"Ludwik Silberstein","thumbnail_url":"https://www.ebooknetworking.net/books/B00/40R/bigB0040RV1SY.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B0040RV1SY.html\">Simplified method of tracing rays through any optical system of lenses, prisms, and mirrors</a>","width":400,"height":300}