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Pub. No.:    WO/2001/081974    International Application No.:    PCT/CA2001/000469
Publication Date: 01.11.2001 International Filing Date: 05.04.2001
G02B 5/20 (2006.01), G02B 7/00 (2006.01), G02B 26/02 (2006.01)
Applicants: APPLIED PHYSICS SPECIALTIES LIMITED [CA/CA]; 17 Prince Andrew Place Don Mills, Ontario M3C 2H2 (CA) (For All Designated States Except US).
LADD, Gale [CA/CA]; (CA) (For US Only).
SAMSON, Eleanor [CA/CA]; (CA) (For US Only).
HIGH, Wilson [CA/CA]; (CA) (For US Only).
BALL, Gary [US/US]; (US) (For US Only)
Inventors: BALL, Gary; (US).
HIGH, Martin;
Agent: SHEARN, Jim; Ridout & Maybee One Queen Street East Suite 2400 Toronto, Ontario M5C 3B1 (CA)
Priority Data:
2,306,290 20.04.2000 CA
Abstract: front page image
(EN)A variable optical filter for video cameras designed to variably attenuate certain wave lenth signals by means of alternating radially oriented areas of coatings which are opaque or partially opaque to the aforesaid wave lengths. A pair of similarly designed filters can be relatively rotated to cause opaque areas to overlap non-opaque areas and thereby reduce the signal intenstiy.
(FR)L'invention concerne un filtre optique variable pour des caméras vidéo conçues pour atténuer de manière variable certains signaux de longueur d'ondes au moyen de zones de revêtement alternatives, à orientation radiale, qui sont opaques ou partiellement opaques par rapport aux longueurs d'ondes susmentionnées. Une paire de filtres conçus de la même manière peut tourner de façon à amener les zones opaques à chevaucher des zones non opaques et réduire ainsi l'intensité des signaux.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CR, CU, CZ, DE, DK, DM, DZ, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, TZ, UA, UG, US, UZ, VN, YU, ZA, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)