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1. (WO2018220473) OPTICAL FILM AND OPTICAL SYSTEM
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Pub. No.: WO/2018/220473 International Application No.: PCT/IB2018/053615
Publication Date: 06.12.2018 International Filing Date: 22.05.2018
IPC:
G02B 1/10 (2015.01) ,G02B 1/12 (2006.01) ,G02B 5/18 (2006.01) ,G02B 27/42 (2006.01)
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
1
Optical elements characterised by the material of which they are made; Optical coatings for optical elements
10
Optical coatings produced by application to, or surface treatment of, optical elements
G PHYSICS
02
OPTICS
B
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
1
Optical elements characterised by the material of which they are made; Optical coatings for optical elements
10
Optical coatings produced by application to, or surface treatment of, optical elements
12
by surface treatment, e.g. by irradiation
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
27
Other optical systems; Other optical apparatus
42
Diffraction optics
Applicants:
3M INNOVATIVE PROPERTIES COMPANY [US/US]; 3M Center Post Office Box 33427 Saint Paul, Minnesota 55133-3427, US
Inventors:
YANG, Zhaohui; US
SITTER, Brett J.; US
THIELEN, James A.; US
NAISMITH, Nathaniel K.; US
Agent:
RICHARDSON, Clifton F.,; US
RHODES, Kevin H.; US
BLANK, Colene H.,; US
HARTS, Dean M. ,; US
LEVINSON, Eric D.,; US
MAKI, Eloise J.,; US
NOWAK, Sandra K.,; US
OLSON, Peter L.,; US
RINGSRED, Ted K.,; US
Priority Data:
62/514,16702.06.2017US
Title (EN) OPTICAL FILM AND OPTICAL SYSTEM
(FR) FILM OPTIQUE ET SYSTÈME OPTIQUE
Abstract:
(EN) A multilayer optical film including a first layer having an index of refraction n1 at a wavelength λ in a range from about 580 nm to about 650 nm, and a second layer having an index of refraction n2 at λ is described. The first and second layers define an interface therebetween comprising a two-dimensional grating. The grating may have an average height H such that |n1-n2|*H is in a range from 0.24 micrometers to 0.3 micrometers. Optical systems including the multilayer optical film are described. A subpixel in a display surface of the optical system may be diffracted into a zero diffraction order and a plurality of first diffraction orders where the intensities of the zero and first diffraction orders are with 10% of each other at λ. The optical system may have a modulation transfer function greater than 0.4 at 10 line pairs per millimeter.
(FR) La présente invention concerne un film optique multicouche comprenant une première couche ayant un indice de réfraction n1 à une longueur d’onde λ dans une plage d’environ 580 nm à environ 650 nm, et une deuxième couche ayant un indice de réfraction n2 à λ. Les première et deuxième couches définissent une interface entre celles-ci comprenant un réseau bidimensionnel. Le réseau peut avoir une hauteur moyenne H telle que/n1-n2/*H soit dans une plage de 0,24 micromètre à 0,3 micromètre. L’invention concerne en outre des systèmes optiques comprenant le film optique multicouche. Un sous-pixel dans une surface d’affichage du système optique peut être diffracté dans un ordre de diffraction zéro et une pluralité de premiers ordres de diffraction, les intensités de l’ordre de diffraction zéro et des premiers ordres de diffraction étant à 10 % les unes des autres à λ. Le système optique peut avoir une fonction de transfert de modulation supérieure à 0,4 à 10 paires de lignes par millimètre.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)