Optical element having non-linear optical properties including a substrate having a coating of an azo compound
US4946629A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 1988 |
| Grant date | Aug 7, 1990 |
| Priority date | — |
| Expiry date | Nov 25, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S534/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
(i) A compound of the formula: ##STR1## wherein R is H, a metal or a group containing a tetravalent N atom; PA0 X is ##STR2## R.sup.1 is NO.sub.2, CN or COOY; Y is H, C.sub.1-4 -alkyl, a metal or a group containing a tetravalent N atom; PA0 R.sup.2 & R.sup.3 are each independently H or a non-hydrophilic aliphatic or cycloaliphatic group containing up to 30 carbon atoms; PA0 R.sup.4 & R.sup.5 are each independently H or a non-hydrophilic aliphatic or cycloaliphatic group containing up to 30 carbon atoms; PA0 and R.sup.6 & R.sup.7 are each independently H or a non-hydrophilic group containing up to 4 carbon atoms; PA0 or R.sup.4 & R.sup.6 together comprise ring fused to Ring A and R.sup.5 & R.sup.7 are as hereinbefore defined; PA0 or R.sup.5 & R.sup.7 together comprise ring fused to Ring A and R.sup.4 & R.sup.6 are as hereinbefore defined; PA0 or R.sup.2 & R.sup.4 together with the N atom to which R.sup.2 is attached from a ring fused to Ring A and R.sup.3 & R.sup.5 are as hereinbefore defined; PA0 or R.sup.3 & R.sup.5 together with the N atom to which R.sup.3 is attached form a ring fused to Ring A and R.sup.2 & R.sup.4 are as hereinbefore defined; provided there are, in total, from…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.