000069996 001__ 69996
000069996 005__ 20190709135433.0
000069996 0247_ $$2doi$$a10.1364/AO.56.003628
000069996 0248_ $$2sideral$$a99069
000069996 037__ $$aART-2017-99069
000069996 041__ $$aeng
000069996 100__ $$0(orcid)0000-0003-3178-5253$$aTorcal-Milla, Francisco Jose$$uUniversidad de Zaragoza
000069996 245__ $$aCollimation technique and testing applied to finite size polychromatic sources
000069996 260__ $$c2017
000069996 5060_ $$aAccess copy available to the general public$$fUnrestricted
000069996 5203_ $$aHighly collimated beams are required in numerous applications and techniques. Different methods have been proposed for collimating monochromatic point light sources during the recent years. In this work, we analyze how a finite size and polychromatic light source can be collimated using only one diffraction grating and a CMOS camera placed after the source and the collimating lens. For this, we determine the period of the fringes diffracted by the grating and compare it with the period of the grating. Analytical equations are obtained to predict the amplitude of the fringes and their period. Since self-images disappear for finite size polychromatic sources at long distances from the grating, the period has to be measured close to the grating. In addition, we give an analytical equation to determine the error in the positioning of the source in terms of the source size and the setup parameters. Finally, we experimentally corroborate the obtained analytical formalism using a white LED of size s = 0.6 mm collimated by a lens with focal length f = 25 mm, and a Ronchi binary grating of period d = 250 µm. In this case, we achieve an experimental error in the positioning of the source with respect to the focal plane of the lens of dzexp = 92 µm.
000069996 536__ $$9info:eu-repo/grantAgreement/ES/MI/SPIP2015-01812
000069996 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000069996 590__ $$a1.791$$b2017
000069996 591__ $$aOPTICS$$b49 / 94 = 0.521$$c2017$$dQ3$$eT2
000069996 592__ $$a0.715$$b2017
000069996 593__ $$aElectrical and Electronic Engineering$$c2017$$dQ1
000069996 593__ $$aEngineering (miscellaneous)$$c2017$$dQ1
000069996 593__ $$aAtomic and Molecular Physics, and Optics$$c2017$$dQ2
000069996 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000069996 700__ $$aSanchez-Brea, Luis Miguel
000069996 7102_ $$12002$$2385$$aUniversidad de Zaragoza$$bDpto. Física Aplicada$$cÁrea Física Aplicada
000069996 773__ $$g56, 12 (2017), 3628-3633$$pAppl. opt. (2004)$$tAPPLIED OPTICS$$x1559-128X
000069996 8564_ $$s1679058$$uhttps://zaguan.unizar.es/record/69996/files/texto_completo.pdf$$yPostprint
000069996 8564_ $$s117116$$uhttps://zaguan.unizar.es/record/69996/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000069996 909CO $$ooai:zaguan.unizar.es:69996$$particulos$$pdriver
000069996 951__ $$a2019-07-09-11:32:47
000069996 980__ $$aARTICLE