WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |

Search International and National Patent Collections
World Intellectual Property Organization
Machine translation
1. (WO2002031405) BEAM EXPANSION
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2002/031405    International Application No.:    PCT/GB2001/004528
Publication Date: 18.04.2002 International Filing Date: 11.10.2001
Chapter 2 Demand Filed:    03.05.2002    
F21V 8/00 (2006.01)
Applicants: SCREEN TECHNOLOGY LTD. [GB/GB]; Unit D1, Button End, Harston, Cambridge CB2 5NX (GB) (AE, AG, AL, AM, AT, AU, AZ, BA, BB, BE, BF, BG, BJ, BR, BY, BZ, CA, CF, CG, CH, CI, CM, CN, CO, CR, CU, CY, CZ, DE, DK, DM, DZ, EC, EE, ES, FI, FR, GA, GB, GD, GE, GH, GM, GN, GQ, GR, GW, HR, HU, ID, IE, IL, IN, IS, IT, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MC, MD, MG, MK, ML, MN, MR, MW, MX, MZ, NE, NL, NO, NZ, PH, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, SN, SZ, TD, TG, TJ, TM, TR, TT, TZ, UA, UG, UZ, VN, YU, ZA, ZW only).
GALLEN, Niall, Anthony [IE/GB]; (GB) (For US Only).
YORK, Timothy [GB/GB]; (GB) (For US Only).
TRAVIS, Adrian, Robert, Leigh [GB/GB]; (GB) (For US Only)
Inventors: GALLEN, Niall, Anthony; (GB).
YORK, Timothy; (GB).
TRAVIS, Adrian, Robert, Leigh; (GB)
Agent: TURNER, James, Arthur; D. Young & Co., 21 New Fetter Lane, London EC4A 1DA (GB)
Priority Data:
0024945.8 11.10.2000 GB
Abstract: front page image
(EN)A large-area collimated beam (1) of radiation is formed by re-directing a beam of small projected area off one or two orthogonal surfaces (11, 12) which are faceted or have a non-specular reflection angle and which spatially distribute the incoming (1) beam across their surface area. Preferably there are two expansion stages, one for each dimension. If the input beam (1) is linearly polarised then the output beam will also be polarised. The polarisation will undergo a rotation through 90 degrees. The beam expander is compact and suitable for use in liquid-crystal flat-panel displays.
(FR)La présente invention concerne un faisceau de rayonnement aligné sur une grande zone qu'on forme en redirigeant un faisceau de petite zone de projection à partir d'une ou de deux surfaces orthogonales qui présentent des facettes ou qui possèdent un angle de réflexion non spéculaire et qui distribuent dans l'espace le faisceau entrant à travers leur zone de surface. Il existe, de préférence, deux stades de dilatations, un pour chaque dimension. Si le faisceau entré est polarisé linéairement, alors le faisceau de sortie sera aussi polarisé. Cette polarisation effectuera une rotation sur 90 degrés. Ce dispositif de dilatation de faisceau est compact et convient pour des écrans plats à cristaux liquides.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, 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, PH, 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, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)