Precision Optical Molding

Advanced Plastic Optics for Medical, Imaging, and Emerging Applications

When Off-the-Shelf Optics Just Won’t Cut It

If you’re designing a product that demands compact form factors, thermal resistance, or custom beam shaping, you already know: precision-molded optics aren’t just a cheaper substitute for glass—they’re often the only solution. At Yighen Ultra Precision, we specialize in injection-molded plastic optics that rival traditional glass in quality, while enabling speed, flexibility, and affordability at scale.

Our clients—ranging from medical device startups to Tier-1 automotive suppliers—come to us when performance matters and timelines are tight.

🏭 Our Dongguan Optical Molding Facility

Unlike many trading companies, Yighen owns and operates its own injection molding plant in Dongguan, China. This gives us total control over quality, cost, and delivery.

Key facts:

• 3,000 m² facility, 30+ dedicated technicians

• 15+ Fanuc injection molding machines (30–280 tons)

• Full in-house tooling center with CNC, slow wire EDM, and polishing lines

• Cleanroom-ready assembly area for optical modules

• Comprehensive metrology lab: Taylor Hobson profilometers, 3D CMMs, stress and focal testers

We don't just make lenses—we co-engineer optical modules that go from CAD to production in weeks, not months.

🧠 What We've Learned from Over 100 Molded Optics Projects

“Mold flow simulation might say your lens will cool evenly—but in real life, heat buildup on the runner side can create a 10 nm surface deviation. We've been there. That’s why we always test gate positioning with both simulation and empirical trials.”

We’ve helped clients avoid:

• Warping and birefringence in high-aspect-ratio aspheres

• Cracking in PC lenses under UV sterilization

• Lens-module misalignment during ultrasonic welding

• IR lens deformation from poor mold temperature control

Our experience means you don’t have to learn the hard way.

👓 What We Can Mold for You

We deliver optics and assemblies for applications in:

• Medical devices (endoscopes, diagnostics, PCR, ophthalmology)

• Automotive (signal lights, HUDs, sensors)

• AR/VR & wearables (waveguides, light pipes)

• Consumer electronics

• Laser systems

• Security & surveillance

Main product types:

• Aspheric lenses

• Fresnel lenses

• Light pipes & homogenizers

• TIR lenses

• Dome lenses

• Microlens arrays

• IR & SWIR polymer lenses

• LED optics modules

We also support multi-cavity mold builds for high-volume projects.

🔬 Optical-Grade Plastics We Use

We’ve worked with over a dozen optical polymers, including:

• PMMA (acrylic) – clear, stable, low-cost

• PC – impact-resistant and tough

• COC/COP – ideal for IR or bio applications

• PEI, PSU, and hybrid thermoplastics

Need advice on material selection? We’ll help you choose based on refractive index, birefringence risk, moldability, and environmental resistance.

🔍 Quality You Can Measure

We back our optics with full metrology reports, including:

• Surface form (PV, RMS)

• Focal length

• Transmission spectrum

• Birefringence and internal stress

• Centration and wedge

We are ISO 9001 and ISO 13485 certified, with traceability for every batch.

💬 What Our Clients Say

“We struggled with consistent molding on a 3 mm Fresnel before switching to Yighen. Their team not only helped us redesign the part for better flow—they got us to pilot run in under 6 weeks.”
— Medical optics startup, Germany

“Yighen’s molding lab in Dongguan is incredibly well-run. Their tooling guys caught an edge case our own simulation missed.”
— Optical Systems Engineer, US-based LIDAR company

✅ Why Yighen

• Fully integrated design–mold–assembly–test workflow

• Proven experience with complex geometries and critical tolerances

• Rapid prototyping with bridge-to-production scalability

• Transparent communication & global project support

🧪 From Mold to Module — We Deliver More Than Just Plastic Lenses

At Yighen, precision molding isn’t just about replicating shapes — it’s about delivering optical performance at scale.
We support custom tooling, mold flow optimization, surface polish control, and full assembly of injection-molded lens systems.

Whether you're developing micro-optics, light pipes, VR lenses, or Fresnel components — we help turn your idea into mass-producible optics.

🔵 Request a Molding Evaluation or Quote
📩 Share your geometry, material preference, or expected volume — we’ll reply within 24 hours.

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Want to explore supported materials and mold capabilities?
📄 Download Our Molding Capability Sheet

Want to see how we support tool development and production transfer?
👤 Learn More About Yighen

🔗 Related Content

• 🧱 Optical Mass Production
  Scale your optics with consistent quality across thousands of molded parts.

• 🧪 Prototyping Optical Components
  Need a few fast samples before mold investment? We support rapid prototyping in PMMA, COP, ZEONEX, and more.

• ⚙️ Opto-Mechanical Design Services
  Ensure your molded optics integrate smoothly into mechanical systems and modules.

• 🔬 Optical Coating Services
  Enhance your plastic lenses with AR, mirror, or beam-splitting coatings — in-house.