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Pub. No.:    WO/2008/098339    International Application No.:    PCT/CA2007/000236
Publication Date: 21.08.2008 International Filing Date: 16.02.2007
G02B 1/04 (2006.01), C08J 5/00 (2006.01), G02B 1/02 (2006.01), G02B 5/00 (2006.01)
Applicants: THE GOVERNING COUNCIL OF THE UNIVERSITY OF TORONTO [CA/CA]; Simcoe Hall, Room 133S, 27 King's College Circle, Toronto, Ontario M5S 1A1 (CA) (For All Designated States Except US).
ARSENAULT, Andre [CA/CA]; (CA) (For US Only).
OZIN, Geoffrey Alan [CA/CA]; (CA) (For US Only).
VON FREYMANN, Georg [DE/DE]; (DE) (For US Only)
Inventors: ARSENAULT, Andre; (CA).
OZIN, Geoffrey Alan; (CA).
Agent: OGILVY RENAULT LLP/S.E.N.C.R.L., s.r.l.; Suite 1600, 1981 Mcgill College Avenue, Montreal, Québec H3A 2Y3 (CA)
Priority Data:
Abstract: front page image
(EN)A compressible photonic crystal comprising a polymer with an ordered array of voids, the photonic crystal having a reflectance in a first wavelength range for light incident to its incident surface and its opposing incident surface; wherein compression against at least a portion of at least one of the surfaces shifts the reflectance to a second wavelength range in at least that portion of that surface. The crystal may be used in authentication devices of various types.
(FR)L'invention concerne un cristal photonique compressible comprenant un polymère avec un réseau ordonné de vides, le cristal photonique ayant une réflectance dans une première plage de longueurs d'onde pour une lumière incidente sur sa surface incidente et sa surface incidente opposée. Selon l'invention, une compression contre au moins une partie d'au moins l'une des surfaces décale la réflectance vers une seconde plage de longueurs d'onde dans au moins cette partie de cette surface. Le cristal peut être utilisé dans des dispositifs d'authentification de divers types.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SV, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)