Polymer Light Guides

Polymer light guides are precision optical components designed to efficiently transmit, redirect, and shape light within compact photonics and illumination systems. These guides are fabricated from high-performance optical polymers and engineered to support total internal reflection, tailored light propagation, and controlled output profiles using advanced design and manufacturing techniques.

Polymer light guides offer reliable and efficient light transport in systems where weight, scalability, and optical precision are critical. At G&H, we manufacture custom polymer light guides that combine precision-molded geometries with smooth optical surfaces to achieve predictable light propagation, uniformity, and minimal loss across visible and near-infrared wavelengths.

Light guides can be designed for:

• Edge illumination coupling - transporting light from LEDs, VCSELs, or laser diodes
• Uniform distribution - delivering smooth illumination across displays or sensor arrays
• Bend and routing control - maintaining intensity and profile through curved paths
• Coupling and extraction - directing light to specific targets or interfaces

Applications

• Medical and diagnostic instrumentation - consistent illumination in handheld and benchtop devices
• AR/VR and wearable displays - efficient light routing in compact optical stacks
• Industrial and machine vision lighting - uniform illumination for sensors
• Consumer electronics - backlighting, edge lighting, and indicator illumination modules

Core Capabilities

• Custom light guide geometries from micro-scale to multi-centimetre footprints
• Precision surface quality for low scatter and high throughput
• Controlled light extraction features such as micro-textures and patterned regions
• ISO-class cleanroom assembly and quality control

Advantages of Polymer Light Guides

• Efficient light transport: Designed to maximise internal reflection and minimise propagation loss.
• Tailored output control: Custom features enable uniform or structured illumination.
• Lightweight & compact: Polymer materials reduce weight and support space-constrained designs.
• Design flexibility: Molding and micro-patterning allow bespoke shapes and integrated mounting features
• Cost-effective scalability: Precision molding supports consistent performance at high volume
• Broad material selection: Suitable polymers support a range of optical, mechanical, and environmental requirements

Why G&H | GS Optics

• Decades of polymer optics design, tooling, and manufacturing expertise.
• In-house precision injection molding and CNC machining.
• Integrated optical metrology to verify performance and surface quality.
• Collaborative design-to-production engineering support.
• Proven performance across medical, industrial, display, and defence systems.
• Advanced optical metrology and inspection facilities.

Engineering Expertise

Based on decades of expertise, G&H | GS Optics engineers provide our customers with DFM recommendations to ensure that their polymer optics programs are successful. Using mold flow simulations, we can model how resin will fill the mold during the injection molding process to better position gates, anticipate where knit lines will appear, and locate difficult to fill spots in the mold. G&H | GS Optics specializes in scientific injection molding which is a systematic, data-driven methodology to produce world class polymer optics.

Prototypes are diamond-turned using Precitech Nanoform 200 and Nanoform X systems, achieving nanometric surface finish without post-polishing. The same tooling precision transfers directly into injection molds for scalable production.

Quality Assurance and Process Validation

All polymer optics produced by G&H | GS Optics are subject to rigorous quality standards to ensure consistent, reliable performance. Each lens is measured using a variety of metrology equipment to verify dimensional accuracy, surface quality, and refractive characteristics.

To reduce risk after transferring from development to production, GS Optics can conduct a process validation through a combination of installation (IQ), operational (OQ), and performance (PQ) qualifications, ensuring process repeatability and consistent optical performance.

Material Options