{"id":1980,"date":"2021-01-09T12:04:07","date_gmt":"2022-12-19T00:00:00","guid":{"rendered":"http:\/\/optical-tech-group.toyotec.com\/?post_type=technicalcolumn&p=1980"},"modified":"2025-01-22T18:57:10","modified_gmt":"2025-01-22T09:57:10","slug":"what-is-the-peripheral-illumination-ration","status":"publish","type":"technicalcolumn","link":"https:\/\/optical-tech-group.toyotec.com\/de\/technicalcolumn\/what-is-the-peripheral-illumination-ration\/","title":{"rendered":"(RDL) What is the peripheral illumination ratio?"},"content":{"rendered":"

RDL peripheral illumination ratios are as follows<\/p>\n

Horizontal: 58%
\nDiagonal: 45%<\/p>\n

In the central projection method used by the RDL, the vignetting ratio decreases according to the cosine fourth law. The vignetting ratio is inversely proportional to the distortion factor, and if one is raised, the other is lowered. Therefore, a lens unit with a low distortion rate, such as the RDL, will have a higher peripheral illumination ratio.<\/p>","protected":false},"featured_media":2082,"parent":0,"template":"","technicaltypes":[],"columns":[],"category_columns":[78],"acf":[],"yoast_head":"\nRDL | What is the peripheral illumination ratio\uff5cToyotec Solutions<\/title>\n<meta name=\"description\" content=\"RDL peripheral illumination ratios:Horizontal: 58% Diagonal: 45% By RDL,in central projection method, the vignetting ratio decreases according to cosine 4th law\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/optical-tech-group.toyotec.com\/de\/technicalcolumn\/what-is-the-peripheral-illumination-ration\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"RDL | What is the peripheral 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