Invention:
This invention introduces a new class of UV-curable Disulfide Glass (DSG) photoresists and photopolymer resins, designed for high-quality optical component fabrication and complex 3D printing. This polymer features exceptional optical transparency across the visible and infrared spectrum, coupled with robust thermomechanical properties, making it ideal for precision plastic optics. DSG offers a high refractive index (RI) and can be processed into thick, defect-free optical components, such as windows, lenses, and prisms. Its superior transparency surpasses common plastics like PMMA (Plexiglass) while maintaining cost-efficiency. The versatile processing capabilities of DSG allow for the fabrication of precision optical devices using established industrial techniques like diamond turning.
Background:
Traditional commodity optical plastics like PMMA and polycarbonate have limitations in refractive index, optical clarity, and processability. PMMA offers excellent transparency but falls short on refractive index, while polycarbonate exhibits high birefringence and becomes hazy in thicker forms. Other options, such as epoxy resins and perfluorinated polymers, either suffer from poor optical clarity or pose environmental concerns. DSG addresses these gaps by offering high RI and superior optical clarity without relying on environmentally harmful substances. Additionally, unlike existing materials, DSG can be processed into thick, transparent components without introducing haze or significant optical losses.
Applications:
- Precision plastic optics
- Consumer electronics lenses and displays
- Coatings with enhanced IR transparency
- 2-D photopatterning of microstructures
- Photolithography and photoresists
- Optical sensors and microfluidics
Advantages:
- Higher refractive index than common plastics like PMMA and polycarbonate
- Superior transparency across the VIS-NIR-SWIR spectrum
- Cost-effective production using inexpensive sulfur petrochemicals
- Can be processed into large, defect-free optical components
- Environmentally friendly alternative to fluorinated polymers
- Compatible with precision manufacturing methods (e.g., diamond turning)
- Sustainable degradation and upcycling capabilities
