Roger Bacon, O.F.M. (Ilchester, Somerset, 1214 - Oxford 1294) alikuwa msomi mkubwa wa mambo mengi kutoka Uingereza. Kisha kusomea chuo kikuu cha Oxford, alijiunga na utawa wa Ndugu Wadogo (1256). Hapo aliacha kufundisha lakini akaendelea na masomo yake na hata kuandika kuhusu mambo mengi tofauti hadi kifo chake. James, R.R. (1928). "THE FATHER OF BRITISH OPTICS: ROGER BACON, c. 1214–1294". British Journal of Ophthalmology 12 (1): 1–14. doi:10.1136/bjo.12.1.1 . PMC 511940 . PMID 18168687 . http://bjo.bmj.com/content/12/1/1.citation. Retrieved 2014-10-19. Linda S. Noelker, Kenneth Rockwood, Richard Sprott (ed.), The Encyclopedia of Aging: A-K, Springer Publishing Company, 2006, p. 69. Glick, Thomas F.; Livesey, Steven John; Wallis, Faith: Medieval Science, Technology, and Medicine: An Encyclopedia, first edition, Routledge, 29 September 2005, ISBN 978-0-415-96930-7, p. 71 Roger Bacon. The Art and Science of Logic (Mediaeval Sources in Translation, 47), Toronto, PIMS 2009. Roger Bacon. On Signs (Mediaeval Sources in Translation, 54), Toronto, PIMS 2013.