Diffractive Optical Element Fabrication Services

We work with a wide variety of metals and polymers including PMMA, polycarbonate, polystyrene, and cyclic olefin polymers. DOE performance is sensitive to micron- or sub-micron-scale depth accuracy, sharp edge definition, consistent feature replication, and dimensional stability across temperature. Fabrication method and process control are not secondary considerations. They are core optical variables.

We use single-point diamond turning (SPDT) and precision polymer injection molding for high-volume production applications. Glass DOEs provide high thermal stability, minimal creep, and stable phase geometry over time. Polymer DOEs enable cost efficiency at scale, integrated mounting features, lightweight components, and complex hybrid optical surfaces. However, polymer introduces higher thermal expansion, shrink during molding, residual stress, potential creep, and sensitivity to tool wear. Phase geometry in polymer must account for material movement.

Applications include vision correction, laser systems, AR/VR displays, medical devices, automotive lighting, and photolithographic alignment systems. DOE phase performance depends on precise surface relief depth. In polymer molding, material shrink affects feature depth, packing pressure alters replication, and cooling gradients create dimensional variation. Even small deviations in phase depth can reduce diffraction efficiency, introduce stray light, alter beam profile, and shift intensity distribution. Fabrication must include shrink compensation modeling.

We are ISO 13485-2016 certified for medical device quality management and maintain comprehensive in-house metrology capabilities. DOE molds rely on ultra-precise inserts, high-fidelity micro-structuring, stable venting, and uniform cooling. Over time, micro-feature edges wear, insert surfaces degrade, and replication fidelity shifts. Performance drift can occur if tooling is not maintained as optical tooling. DOE tooling requires disciplined lifecycle management.

Our manufacturing capabilities support components ranging from 1 mm to 300 mm in diameter with precision tolerances. Injection molding can introduce molecular orientation, internal stress gradients, and birefringence. For DOEs, this may alter phase delay, polarization behavior, and diffraction efficiency. Stress control is critical, especially for wavelength-specific designs.

Yes, we offer complete optical and mechanical design services, design verification, and collaborative design engagement for custom applications. DOE performance is wavelength-sensitive. Fabrication tolerances must reflect intended operating wavelength, spectral bandwidth, and temperature-dependent refractive index changes. Material dispersion in polymers must be considered during design and fabrication.

DOE components may face temperature cycling, humidity exposure, UV radiation, and mechanical stress. Polymer micro-features can relax, creep, and change geometry slightly over time. Small geometry shifts can affect phase performance. Validation must include long-term stability testing.

Polymer may not be appropriate if dimensional stability requirements are extreme, operating temperatures are high, creep cannot be tolerated, or phase tolerances are extremely narrow. Glass or hybrid fabrication methods may provide greater stability in some systems. Material choice must align with performance and lifecycle demands.

Many DOEs perform well in prototype runs. Production ramp introduces resin lot variability, parameter drift, tooling wear, and cycle time pressure. If the DOE design is overly sensitive to small geometric variation, yield decreases. Robust fabrication requires realistic process margins, controlled molding parameters, ongoing tooling validation, and metrology that verifies phase depth and surface fidelity.

Rather than asking 'Can you mold a DOE?', experienced teams ask: How is phase depth accuracy measured? How is shrink modeled and compensated? How stable is feature replication over tool life? What is the long-term creep behavior? How does temperature affect diffraction efficiency? These questions define production viability.