New Bedford, MA, USA, July 7, 2017– Fiber Optic Center, Inc., (FOC), an international leading distributor specializing in helping their customers make the best cable assemblies in the world, introduces High Refractive Index Coating for Optoelectronics, LEDs, Emissive displays, AL-2264
FOC introduces a new product, an optical polymer dissolved in an evaporative solvent that can be applied by simple methods, i.e. dip, spin coating, drawdown, printing, etc. Upon drying it creates a hard, durable, polymer coating with a refractive index of 1.64. This polymer contains no metals, and the product contains no nanoparticles. The standard concentration leaves behind an approximately 20u layer coating thickness (using a single dip coating process). Coating thickness is easily reduced by diluting the standard concentration with the compatible solvent. The solvent is easily removed by baking at 100°C for 15 minutes.
Optically clear, high refractive index coatings can be used to improve the performance of light gathering/dispersing devices. Many solid state optical devices, i.e. imaging/optical sensors, emissive displays, LEDs, are made of light emitting semiconductors with significantly higher refractive indices (>2) than air (1.0). Light is partially reflected when it encounters a sudden difference of refractive index. Light transmission at such boundaries is improved with a layer of an intermediate refractive index material, thus improving the optical efficiency of the device – effectively raising the numerical aperture (NA) of the optical system. For semiconductors and air, that desirable refractive index is in the >1.6 range. Additionally in this case, the ‘air’ side of the coating directly contacts the environment and must be protective: hardness and durability are required; chemical resistance is a plus.
For questions on specific applications for AL-2264, Randall Elgin, Technical Manager for Specialty Products at FOC can be reached 508-717-8376 or randalle@focenter.com.
Additional resources from the FOC team include:
- View FOC technical solution content
- View the Glossary, Acronyms, Military Specifications for Connectors
- Q&A Resource: email technical questions to AskFOC@focenter.com
This article is an original publication of Fiber Optic Center, Inc. It is shared publicly for educational and reference purposes to support learning and professional development within the fiber optics industry.
You are welcome to read, cite, or reference this material for non-commercial and educational purposes, as long as full credit is given to Fiber Optic Center, Inc. and the author.
Reuse, reproduction, or adaptation of this content — including rewriting, republishing, or incorporating it into new materials (such as websites, blogs, marketing text, technical guides, or AI-generated content) — is not permitted without prior written consent from Fiber Optic Center, Inc.
This material is protected by copyright law upon publication, even if not formally registered.
Use of this content for AI training, automated data extraction, or derivative content generation is prohibited.
Fiber Optic Center monitors and enforces the integrity of its intellectual property through digital identifiers and content tracking.
For more details, please refer to the Fiber Optic Center Content Use and Copyright policy.
