Fly’s Eye Lenses

Precision fly’s eye lenses for uniform illumination are multi-element optical arrays that redistribute and homogenize light from a divergent source into a smooth, uniform field.

At G&H | GS Optics, manufacture custom polymer Fly’s Eye lenses that achieve exceptional beam uniformity and optical efficiency for LED lighting, projection, medical, and defense illumination systems. Our advanced molding and metrology capabilities ensure precise array pitch, curvature, and alignment across every element - enabling tight optical tolerances and repeatable performance at scale.

How Fly’s Eye Lenses Work

A Fly’s Eye array consists of two identical lens plates aligned so that each microlens pair divides and overlaps the incident beam. The result is a highly uniform output profile with minimal hot spots - critical for illumination in imaging, display, and laser systems. Through precision injection molding, we replicate complex surface geometries with sub-micron accuracy, ensuring excellent surface form and element-to-element consistency.

Applications

• LED and laser illumination – beam homogenizers for light engines
• Projection and display systems – uniform brightness and color mixing
• Medical imaging – controlled illumination in diagnostic instruments
• Machine vision and inspection – structured light with consistent intensity
• Defense and aerospace – compact, efficient optical illumination modules

Core Capabilities

• Custom Fly’s Eye arrays up to 100 × 100 mm
• Spherical, aspheric, or freeform element geometries
• Master tooling via diamond turning for sub-micron precision
• Injection-molded replication with multi-cavity tooling
• In-house AR and HR coatings for visible or NIR optimization

Advantages of Polymer Fly’s Eye Lenses

• Uniform illumination: Achieve near-perfect beam homogenization across the field.
• Compact integration: Combine hundreds of elements in one lightweight component.
• Exceptional repeatability: Injection-molded accuracy across all lenslets.
• Reduced system cost: Eliminates need for separate diffusers or complex optical stacks.
• Lightweight durability: Polymers are 2–5× lighter than glass - ideal for portable systems.

Why G&H | GS Optics

• 100+ years of polymer optics manufacturing heritage
• End-to-end manufacture, molding, coating, and metrology in Rochester, NY
• ISO-certified and DDTC-registered facility
• Proven track record in high-precision illumination optics
• Collaborative engineering support from prototype to 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: