Freeform Polymer Lenses

Freeform polymer optic lenses are advanced optical components featuring one or more surfaces with no rotational or translational symmetry. These bespoke surfaces enable designers to correct complex aberrations, tailor beam profiles, and reduce component count delivering optical performance that goes beyond traditional spherical or aspheric lenses.

Freeform polymer optics are particularly valuable in compact imaging systems, augmented/virtual reality (AR/VR) displays, high-precision illumination applications, and custom photonics solutions where conventional optics cannot meet performance or packaging requirements.

Applications

Freeform polymer lenses are used in a range of advanced photonics systems, including but not limited to:

• AR/VR & Head-Mounted Displays (HMDs) - compact optics with tailored field shaping
• Machine Vision & Inspection - customized correction for off-axis imaging
• Medical Imaging & Surgical Optics - precision illumination and image quality in compact devices
• Illumination Engineering - non-symmetric light distributions for automotive, architectural, and specialized lighting

Core Capabilities

G&H combines in-house mold manufacture, precision toolmaking, and high-performance polymer injection molding to produce freeform polymer optics with tight dimensional control and optical surface quality.

• Rapid prototyping - to validate design and performance early
• High-volume molding - for production runs with consistent quality
• Custom materials and coatings - to meet application-specific optical, environmental, or regulatory needs

Advantages of Freeform Polymer Optic Lenses

• Design freedom beyond rotational symmetry - Enables bespoke, non-symmetric optical surfaces that cannot be achieved with traditional spherical or aspheric lenses.
• Advanced aberration correction - Corrects complex, off-axis and field-dependent aberrations within a single optical element.
• Reduced optical system complexity - Replaces multiple conventional lenses with a single freeform component, reducing part count and alignment requirements.
• Compact and lightweight optical solutions - Ideal for size- and weight-critical systems where performance must be maintained in minimal form factors.
• Enhanced beam shaping and illumination control- Allows precise tailoring of light distribution, uniformity, and direction for imaging and illumination applications.
• Cost-effective high-volume production - Complex freeform surfaces can be replicated accurately using precision polymer molding, reducing cost versus glass.
• Improved manufacturability and integration - Mechanical features such as mounts, alignment references, and snap-fits can be integrated directly into the optic.
• Material flexibility - Available in a range of optical polymers to optimise transmission, refractive index, durability, and environmental performance.
• Rapid prototyping and scalability - Supports fast design iteration and smooth transition from prototype to volume manufacture.

Why G&H | GS Optics

• Decades of experience in polymer optics and array molding
• Fully integrated manufacture, tooling, coating, and metrology under one roof
• ISO-certified and DDTC-registered U.S. facility
• Collaborative engineering support from concept through production

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 Selection

We use optical-grade polymers optimized for clarity, refractive index stability, and environmental performance: