Optical materials

Optical materials

JGC C&C’s adjustment technology for fine particles, which realizes small particle size and sharp particle distribution, is a strength of the company. By applying this adjustment technology, we produce transparent optical materials. We provide coating liquid that forms a transparent film of hard coating on plastic lenses for spectacles and other optical parts, as well as materials for adjusting refractive index to prevent optical interference. or conversely to harness optical interference for the production of low-reflection film.

Optical metal oxide sol
- Lineup ranging from products with low refractive index to products with high refractive index

High transparency

Sol where nano-sized metal oxide fine particles are highly dispersed in the dispersion medium.

Adjustment of refractive index

Metal oxide fine particles can be used as a material for adjusting refractive index.

Hard coating property

Each type of paint can be compounded to achieve good dispersibility, and given superior hard coating properties.

Product lineup

Particle refractive index: 1.45

Particle type	Functions achieved	Product name
SiO2	Mechanical functions (Hard coating, thermal expansion control)	OSCAL

Particle refractive index: 2.0 - 2.3

Type of particle	Functions achieved	Product name
TiO2	・Optical functions (Adjustment of refractive index) ・Mechanical functions (Hard coating, thermal expansion control)	OPTOLAKE（Titanium oxide type sol） For details, please refer to the listof products.

We also offer a thermal-cured lacquered material for optical use, comprising functional matrix and functional nanoparticles. It can be used as hard coating material with high refractive index, and shock-resistant primer coating.

Particle type	Functions achieved	Product name
Thermal curing hard coating Refractive index of coating film 1.60 - 1.67	・Optical functions (Adjustment of refractive index, UV cutting) ・Mechanical functions (Hard coating, thermal expansion control)	OPTOLEKA(n=1.60) OPTOLEKA(n=1.67)
Thermal dried primer coating Refractive index of coating film 1.67 - 1.70	・Optical functions (Adjustment of refractive index, UV cutting) ・Mechanical functions (Improvements in shock resistance, adhesiveness) ・Chemical functions (Adsorption)	OPTOLEKA (Primer coating)