Application of Snell’s Law on Optical Cloaking Printing to Laser...Optical Spatial Cloaking is...
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Application of Snell’s Law on Optical Cloaking By: MIDN 4/C Peralta, 4/C Lockhart, 4/C Caron ABSTRACT Continue an experiment which uses optical spatial cloaking to hide an object behind two separate containers of water. BACKGROUND Optical Spatial Cloaking is based on the idea that light is transversely shifted through a tilted medium and then refracted back to display a separate image from the one being hidden. Following Snell’s law : n1sin( θ1)= n2sin(θ2) The cloaking width (2*d) can be increased by increasing n2. ACKNOWLEDGEMENTS METHODS Two equal containers of water filled with equal volumes of water were used, along with a laser light source, and an object which was used to show the ‘cloaking region’. The cloaking region was created by the index of refraction of the material inside the containers. The material used in the first trail (Trial 1) was water which has an index of refraction of approximately 1.33. The second and third trial was using a 30% and 80% solution of sugar- water respectively in order to change the index of refraction. Measurements on the maximum cloaking width was taken by splitting a beam on corner of the apparatus and measuring the seperation between the resulting beams. CONCLUSION The future of this project lies in trying to maximize the cloaked area while minimizing the size of the cloaking apparatus. This can be done by finding a material for the appartus with a higher index of refraction, or by altering the angle of the apparatus to create a longer path. REFERENCES J. C. Howell, J. B. Howell, and J. S. Choi, “Amplitude-only, passive, broadband, optical spatial cloaking of very large objects,” Applied Optics, (2014). RESULTS Light was diffracted to show image behind the second container. The maximum cloaking distance was approximately 10.75 centimeters across using a pure water solution of 1.33 index of refraction, 11 cm and 11.5 cm with subsequent additions of cups of sugar to demonstrate how changing the index of refraction increases the cloaking width through the application of Snell’s law.
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ApplicationofSnell’sLawonOpticalCloakingBy: MIDN 4/C Peralta, 4/C Lockhart, 4/C Caron
ABSTRACT
Continueanexperimentwhichusesopticalspatialcloakingtohideanobjectbehindtwoseparatecontainersofwater.
BACKGROUND
OpticalSpatialCloakingisbasedontheideathatlightistransverselyshiftedthroughatiltedmediumandthenrefractedbacktodisplayaseparateimagefromtheonebeinghidden.
FollowingSnell’slaw:n1sin(θ1)=n2sin(θ2)Thecloakingwidth(2*d)canbeincreasedbyincreasingn2.
ACKNOWLEDGEMENTS
METHODS
Twoequalcontainersofwaterfilledwithequalvolumesofwaterwereused,alongwithalaserlightsource,andanobjectwhichwasusedtoshowthe‘cloakingregion’.
Thecloakingregionwascreatedbytheindexofrefractionofthematerialinsidethecontainers.Thematerialusedinthefirsttrail(Trial1)waswaterwhichhasanindexofrefractionofapproximately1.33.
Thesecondandthirdtrialwasusinga30%and80%solutionofsugar-waterrespectivelyinordertochangetheindexofrefraction.
Measurementsonthemaximumcloakingwidthwastakenbysplittingabeamoncorneroftheapparatusandmeasuringtheseperationbetweentheresultingbeams.
CONCLUSION
Thefutureofthisprojectliesintryingtomaximizethecloakedareawhileminimizingthesizeofthecloakingapparatus.Thiscanbedonebyfindingamaterialfortheappartuswithahigherindexofrefraction,orbyalteringtheangleoftheapparatustocreatealongerpath.
REFERENCES
J.C.Howell,J.B.Howell,andJ.S.Choi,“Amplitude-only,passive,broadband,opticalspatialcloakingofverylargeobjects,”AppliedOptics,(2014).
RESULTS
Lightwasdiffractedtoshowimagebehindthesecondcontainer.
Themaximumcloakingdistancewasapproximately10.75centimetersacrossusingapurewatersolutionof1.33indexofrefraction,11cmand11.5cmwithsubsequentadditionsofcupsofsugartodemonstratehowchangingtheindexofrefractionincreasesthecloakingwidththroughtheapplicationofSnell’slaw.
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