Some content of this application is unavailable at the moment.
If this situation persist, please contact us atFeedback&Contact
1. (WO1999056159) SEGMENTED COMPLEX DIFFRACTION GRATINGS
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1999/056159 International Application No.: PCT/US1999/007391
Publication Date: 04.11.1999 International Filing Date: 23.04.1999
Chapter 2 Demand Filed: 24.11.1999
IPC:
G02B 5/18 (2006.01) ,G02B 6/34 (2006.01) ,G06K 9/74 (2006.01) ,H04J 14/00 (2006.01)
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5
Optical elements other than lenses
18
Diffracting gratings
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6
Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
24
Coupling light guides
26
Optical coupling means
34
utilising prism or grating
G PHYSICS
06
COMPUTING; CALCULATING; COUNTING
K
RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9
Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
74
Arrangements for recognition using optical reference masks
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
J
MULTIPLEX COMMUNICATION
14
Optical multiplex systems
Applicants:
TEMPLEX TECHNOLOGY INC. [US/US]; Suite #101 400 East Second Avenue Eugene, OR 97401, US
Inventors:
MOSSBERG, Thomas; US
MUNROE, Michael; US
GRUNNET-JEPSON, Anders; US
JOHNSON, Alan; US
MANILOFF, Eric; US
Agent:
JONES, Michael, D.; Klarquist, Sparkman, Campbell, Leigh & Whinston, LLP One World Trade Center, Suite 1600 121 S.W. Salmon Street Portland, OR 97204, US
Priority Data:
09/115,33114.07.1998US
60/082,98924.04.1998US
Title (EN) SEGMENTED COMPLEX DIFFRACTION GRATINGS
(FR) GRILLES DE DIFFRACTION COMPLEXES FRAGMENTEES
Abstract:
(EN) Methods and apparatus are disclosed that apply a predetermined complex-valued spectral transfer function to an input optical field to produce an output field that propagates in an output direction. Methods for making such apparatus are also disclosed. Segmented gratings (1915, 1916, 19a15, 19a16) fabricated according to one example comprise a series of spatially distinct subgratings arrayed end to end. Each subgrating possesses a periodic array of diffraction structures, such as lines or other elements. The transfer functions of such segmented gratings are determined by controlling (a) the spatial periodicity or frequency of each subgrating, (b) the amplitude of each subgrating, (c) the spacing between the last diffraction structure (or line) on each subgrating and the first diffraction structure (or line) of the successive subgrating, and (d) the optical path length and transparency through each subgrating, or each subgrating plus additional material layers utilized to control optical path length and transparency. Communication systems using such segmented gratings are also provided.
(FR) L'invention porte sur des procédés et un appareil permettant d'appliquer une fonction prédéterminée de transfert spectral à valeur complexe sur un champ optique d'entrée de façon à générer un champ de sortie qui se propage dans une direction de sortie. L'invention porte également sur des procédés de fabrication de cet appareil. Des grilles fragmentées (1915, 1916, 19a15, 19a16) fabriquées conformément à un type de fabrication comprennent une série de sous-grilles distinctes spatiales mises en réseau bout à bout. Chaque sous-grille possède un ensemble périodique de structures de diffraction telles que des lignes ou autres éléments. On détermine les fonctions de transfert de ces grilles fragmentées en régulant (a) la périodicité ou fréquence spatiale de chaque sous-grille, (b) l'amplitude de chaque sous-grille, (c) l'espace entre la dernière structure de diffraction (ou ligne) sur chaque sous-grille et la première structure de diffraction (ou ligne) de la sous-grille successive, et (d) la longueur et la transparence du chemin optique dans chaque sous-grille, ou chaque sous-grille plus des couches de matériau additionnelles utilisées pour réguler la longueur et la transparence du chemin optique. L'invention porte également sur des système de communication utilisant ces grilles segmentées.
front page image
Designated States: CA, CN, JP, KR, MX
European Patent Office (EPO) (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)