High Refractive Index Polymers for Optical Applications

1997 ◽  
Vol 34 (4) ◽  
pp. 573-586 ◽  
Author(s):  
L. L. Beecroft ◽  
C. K. Ober
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Optical Applications

Thermally stable transparent sol–gel based active siloxane–oligomer materials with tunable high refractive index and dual reactive groups

RSC Advances ◽  
2016 ◽  
Vol 6 (75) ◽  
pp. 70825-70831 ◽  
Author(s):  
Mei Chen ◽  
Guoyan Zhang ◽  
Xiao Liang ◽  
Wanshu Zhang ◽  
Le Zhou ◽  
...  
Keyword(s):  
Refractive Index ◽  
Sol Gel ◽  
High Refractive Index ◽  
Thermally Stable ◽  
Transparent Film ◽  
Reactive Groups ◽  
Optical Applications

A novel active silicone–oligomers used as chemical intermediates in optical applications were synthesized and one of their derivatives, a transparent film with high refractive index, were presented.

Sulfur containing optical plastics and its ophthalmic lenses applications

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
G. S. Jha ◽  
G. Seshadri ◽  
A. Mohan ◽  
R. K. Khandal
Keyword(s):  
Refractive Index ◽  
Fiber Optics ◽  
High Refractive Index ◽  
Linear Optics ◽  
Non Linear Optics ◽  
Plastic Materials ◽  
Different Types ◽  
Optical Applications ◽  
Sulfur Containing ◽  
Optical Plastics

AbstractPlastics produced from the sulfur-based monomer are excellent materials with many optical applications such as ophthalmic lenses, fiber optics and non- linear optics. High refractive index plastic materials are able to reduce the curvature, edge and center thickness of lenses. Sulfur containing plastics such as sulfide, polysulfide, and sulfur containing vinyl compound, thioacrylate, polythiol and isocyanate/isothiocyanate based monomers have demonstrated high refractive index, high Abbe number, good impact strength, excellent machinability, good tintability and good transmittance. In the present article, various sulfur containing plastics with different types of monomers for ophthalmic lens applications are reviewed.

Novel way of making high refractive index plastics; metal containing polymers for optical applications

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Mukti Tyagi ◽  
Gunjan Suri ◽  
Pranshu Chhabra ◽  
Geetha Seshadri ◽  
Amita Malik ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Optical Devices ◽  
Metal Salts ◽  
Inorganic Glass ◽  
Metal Containing Polymers ◽  
Optical Applications ◽  
Almost All ◽  
New Applications ◽  
Optical Plastics

AbstractPlastics are being preferred in almost all possible applications of materials. Several new applications including optical devices are being developed using plastics replacing conventional materials like inorganic glass etc. For the optical applications, the most important properties of plastics essential for their desired performance include refractive index, Abbe number, optical clarity, etc. The biggest challenge in developing suitable materials for optical applications has always been to meet the criteria of high refractive index along with a high Abbe number. Normally, if the refractive index increases, the Abbe number automatically decreases. The researchers have tried several approaches to deal with this typical challenge without which it is not possible to develop novel optical plastics. Presently the most popularly known optical plastics includes polymers such as polymethacrylates, polyurethanes, polycarbonates, polystyrene and diethylene glycol bis allyl carbonate. The latest material of high refractive index plastics with a refractive index of 1.67 belongs to the polythiourethanes chemistry. Several approaches are being tried world over, to develop materials of high refractive index. One of the approaches being pursued for enhancement of refractive index of existing monomers pertain to the incorporation of metals or metal salts in the matrices. The other commonly tried but difficult to achieve approaches pertain to the preparation of nanoparticles or nanocomposites.

scholarly journals Modification of Low Refractive Index Polycarbonate for High Refractive Index Applications

2009 ◽  
Vol 2009 ◽  
pp. 1-8
Author(s):  
Gunjan Suri ◽  
Gouri Shankar Jha ◽  
Geetha Seshadri ◽  
Rakesh Kumar Khandal
Keyword(s):  
Refractive Index ◽  
Thermal Studies ◽  
High Refractive Index ◽  
Refractive Index Material ◽  
Optical Applications ◽  
Low Refractive Index

Polycarbonates and polythiourethanes are the most popular materials in use today, for optical applications. Polycarbonates are of two types which fall in the category of low refractive index and medium refractive index. The present paper describes the conversion of low refractive index polycarbonates into high refractive index material by the use of a high refractive index monomer, polythiol, as an additive. Novel polycarbonates, where the properties of refractive index and Abbe number can be tailor made, have been obtained. Thermal studies and refractive index determination indicate the formation of a new polymer with improved properties and suitable for optical applications.

scholarly journals Novel Nanocomposite Optical Plastics: Dispersion of Titanium in Polyacrylates

2010 ◽  
Vol 2010 ◽  
pp. 1-5 ◽  
Author(s):  
Gunjan Suri ◽  
Mukti Tyagi ◽  
Geetha Seshadri ◽  
Gurcharan Lal Verma ◽  
Rakesh Kumar Khandal
Keyword(s):  
Refractive Index ◽  
Impact Resistance ◽  
Polymeric Materials ◽  
High Refractive Index ◽  
Metal Compounds ◽  
The Matrix ◽  
In Situ Formation ◽  
Optical Applications ◽  
Free Material

Polyacrylates have become the preferred materials for optical applications replacing the conventionally used glass due to their superior optical clarity. The major disadvantage with polyacrylates is their low (1.40–1.50) refractive index besides their poor impact resistance. The improvements in refractive index as well as mechanical properties can be achieved by way of incorporation of metals or metal compounds in the matrix. A novel methodology for the incorporation of high refractive index metals into low refractive index polymeric materials to improve the refractive index and impact resistance of the latter has been developed. With the in-situ formation of nanoparticles ofTiO2, the refractive index of polyacrylates improved from 1.45 to 1.53 and the Abbe number increased from 40 to 57. One of the interesting dimension of this study pertains to the possibility of tailor-making of the two key optical properties of materials by way of varying the amount ofTiO2being formed in-situ. Thermal stability and impact resistance of nano dispersed (4.3% by wt. of Ti) polyacrylates are found to be better than the neat polyacrylates. Moreover,TiO2-containing polyacrylate is of light weight. TEM, SEM, and IR analysis confirms the in-situ formation of nanoparticles ofTiO2. Gamma irradiation has been used as an eco-friendly technique for polymerization. The developed compositions can be cast polymerized into clear and bubble free material for optical applications.

Development of High Refractive Index Plastics

e-Polymers ◽  
2007 ◽  
Vol 7 (1) ◽  
Author(s):  
G.S. Jha ◽  
G. Seshadri ◽  
A. Mohan ◽  
R.K. Khandal
Keyword(s):  
Refractive Index ◽  
State Of The Art ◽  
High Refractive Index ◽  
Present Review ◽  
Current State ◽  
Plastic Materials ◽  
Alternative Materials ◽  
Recent Developments ◽  
Optical Applications ◽  
Optical Plastics

AbstractOptical plastics have been the priority area of research for material scientists worldwide, mainly, to find alternative materials to glass, a conceptual optical material in use over the years. There are numerous advantages of using plastics for optical applications, in particular for ophthalmic applications over glass. Recently, the researchers have been putting their efforts to develop novel plastic materials to meet requirements of ophthalmic industries. The present review compiles the recent developments in the area of optical plastics. The aim is to present the current state-of-the-art in the field, besides analyzing the various aspects of developing optical plastics. The review presents various possible approaches to achieve the desired properties e.g. high refractive index of the optical plastic materials.

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