Essilor International (compagnie Generale D'optique)

Essilor International

Alphamicron, Inc.

Stuart Aiken

Bernard Mark Heron

Christopher David Gabbutt

Samuel Archambeau

Claudine Biver

Fabien Berit-Debat

Jean-Paul Cano

Thomas David Broadbent

Bahman Taheri

Tamas Kosa

Ludmila Sukhomlinova

Sandrine Duluard

Linli Su

Daniel Luke Crossley

Christopher Stephen Kershaw

Nicola Jane Smith

Thomas D Broadbent

Daniel L Crossley

Georgina K Armitage

Jean Paul Cano

Christopher David Gabbut

Christoper David Gabbutt

The present invention relates to a group of novel electrochromic compounds. More specifically, it relates to electrochromic compounds comprising one or several pyridinium rings and the use of these compounds as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.

Electrochromic compounds and optical articles containing them

Electrochromic compounds and optical articles containing them The present invention relates to a group of novel electrochromic compounds. More specifically, it relates to electrochromic compounds comprising one or several pyridinium rings and the use of these compounds as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.

The present invention relates to a group of novel electrochromic materials. More specifically, it relates to electrochromic materials having two-core viologens and the use of these two-core viologens as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.

Electrochromic two-core viologen derivatives and optical articles containing them

The present invention relates to a group of novel electrochromic materials. More specifically, it relates to electrochromic materials based on either single or two-core viologen systems and the use of these viologen systems as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.

Electrochromic single and two-core viologens and optical articles containing them

A naphthopyran compound represented by the formula (I): wherein:

3H-naphtho [2,1-B] pyrans as photochromic dichroic dyes and optical article containing them

A naphthopyran compound represented by the formulae (I) to (II) wherein: &#x2014;mi, Hi2, p, q are each an integer comprised from O to 4 or 5 inclusive; &#x2014;Ri, R2 and R4, represent a group selected from halogen, H, &#x2014;Ra, aryl, &#x2014;OH, &#x2014;ORa, &#x2014;SH, &#x2014;SRa, &#x2014;NH2, &#x2014;NR8RaI, &#x2014;NRbRc, &#x2014;NRal-CORa, &#x2014;NRaiCO(aryl), &#x2014;NRai aryl, &#x2014;N-aryfe, &#x2014;N(aryl)CO(aryl), &#x2014;CO&#x2014;R3, &#x2014;CO2R3I, &#x2014;OC(O)&#x2014;Rd, and &#x2014;X&#x2014;(Re)&#x2014;Y, and linear or branched (Ci-Ci8) perfluoroalkyl group, wherein R3, Rai, Rb, Rc, X, Y, Re, Rd are as defined into the description; &#x2014;Zi re resent a group selected from: (formules).

Photochromic dichroic naphtho-pyrans and optical articles containing them

A naphthopyran compound represented by the formula (I) wherein: n, n, p, m and q represent an integer; R, Rand R, represent a group selected from halogen, &#x2014;R, &#x2014;OH, &#x2014;OR, &#x2014;SH, &#x2014;SR, &#x2014;NH, &#x2014;NRR, &#x2014;NRR, &#x2014;CO&#x2014;R, &#x2014;COR, &#x2014;OC(O)&#x2014;R, &#x2014;X&#x2014;(R)&#x2014;Y, linear or branched (C-C) perfluoroalkyl group, wherein R, R, R, R, X, Y, R, and Rare as defined in the description; Z represents a group selected from CO, CS, SO, SO, CO, C(O)S, CS, C(O)NH, C(O)NR, C(S)NH, C(S)NRand C&#x2550;NR; Rrepresents a group selected from halogen, &#x2014;R, linear or branched (C) perfluoroalkyl group &#x2014;OH, &#x2014;OR, &#x2014;SH, &#x2014;SR, &#x2014;NH, and &#x2014;NRR; Rrepresents a group selected from &#x2014;Rwhich may be optionally substituted, linear or branched (C) perfluoroalkyl, cycloalkyl, heterocycloalkyl, aryl, and heteroaryl, which may be optionally substituted; Rrepresents a group selected from: halogen, &#x2014;R, linear or branched (C) perfluoroalkyl group, &#x2014;OH, &#x2014;OR, &#x2014;SH, &#x2014;SR, &#x2014;NH, &#x2014;NRR, &#x2014;CO&#x2014;R, &#x2014;O&#x2014;C(O)&#x2014;Rand &#x2014;COR; or when q is equal to 2, then two Rtogether represents further a group &#x2014;O&#x2014;(CH)&#x2014;O&#x2014; wherein q1 represents an integer comprised from 1 to 3 inclusive. 

6-(biphenyl-ester)-3H-naphtho[2,1-b]pyrans as photochromic dichroic dyes and optical article containing them

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York, United Kingdom

Stuart Aiken