Two Physical Regimes, One DOE Innovation Story

Diffractive Optical Elements manipulate light through diffraction rather than refraction — and this fundamental distinction unlocks capabilities that conventional lenses simply cannot provide. Within the 70+ patent records analysed for this landscape, DOE technology clusters around two distinct physical operating regimes: diffractive zone plate and grating structures working in the EUV wavelength range of 5–15 nm for semiconductor mask inspection and lithography illumination, and waveguide-coupled DOEs and pupil expanders operating in visible wavelengths for near-eye AR/VR display systems.

The EUV sub-domain is dominated by Samsung Electronics and Carl Zeiss SMT GmbH, whose zone plate and facet-mirror architectures define the illumination paradigm for sub-15 nm lithography. The AR/VR sub-domain is more distributed, with Microsoft, Huawei, Magic Leap, and multiple Chinese optics firms each staking out differentiated positions in waveguide grating design. A smaller but commercially significant third cluster covers ophthalmic diffractive lenses — multifocal intraocular lenses and extended-depth-of-focus designs — where annular diffractive zone profiles split light into multiple focal orders for presbyopia correction.

Understanding where these two regimes converge — and where they diverge — is the central analytical challenge for R&D and IP teams working in photonics, semiconductor equipment, or display technology. According to WIPO, optics and photonics consistently rank among the most internationally contested patent technology fields, making landscape intelligence particularly valuable for identifying white space before it closes.

Filing Timeline: From Foundational Patents to 2026 Frontiers

The DOE patent filing timeline in this dataset spans approximately 2005 to early 2026, with four discernible development phases that map neatly onto the technology’s maturation arc — from early proof-of-concept integrations through infrastructure build-out, commercialisation ramp, and the current adaptive-optics frontier.

The foundational period before 2010 is anchored by Nokia’s 3D diffractive grating for exit-pupil expansion in VR displays (2009, CN) and Koninklijke Philips Electronics’ offset projection DOE system (2005, KR). These early filings established the conceptual framework for waveguide-integrated DOEs that would not reach commercial scale for another decade.

The infrastructure build-out phase from 2010 to 2017 is dominated by EUV lithography optics. Carl Zeiss SMT filed multiple EUV illumination optics patents in KR and JP between 2011 and 2018, establishing the facet-mirror DOE architecture as the dominant illumination paradigm for EUV lithography. Samsung Electronics filed zone plate lens patents for EUV mask aerial imaging in JP in 2010 and 2014, while ASML Netherlands B.V. filed thermal compensation and EUV metrology system patents in KR between 2014 and 2015.

The commercialisation ramp from 2018 to 2022 saw AR/VR DOE patents accelerate sharply: Huawei Technologies filed a near-eye display waveguide patent in EP in 2021, Microsoft filed a MEMS scanner with DOE waveguide coupling in CN in 2019 (updated 2024), and Magic Leap filed its integrated optical component for head-mounted displays in CN in 2024. Alcon’s multifocal diffractive IOL platform (AU, pending as of 2025) signals that ophthalmic DOEs reached clinical-grade sophistication during this period. Standards bodies including ISO have begun addressing optical performance metrics for diffractive ophthalmic lenses, reflecting the technology’s regulatory maturation.

“The most recent DOE filings concentrate on three directions: EUV source optimisation and overlay correction; advanced AR waveguide DOE architectures combining MEMS scanners, metasurfaces, and polarisation beam splitters; and variable adaptive DOE optics addressing vergence-accommodation conflict.”

Application Domains: Where DOEs Are Winning

The 70+ retrieved patent records distribute across four primary application domains, each with distinct technology requirements, competitive dynamics, and maturity levels. Semiconductor lithography and mask inspection represent the largest single cluster, followed closely by AR/VR near-eye displays, with ophthalmic optics and security authentication as smaller but strategically notable domains.

Semiconductor Lithography and Mask Inspection (~30 records)

The largest cluster in this dataset covers EUV lithography at 13.5 nm, where DOEs — zone plates, reflective multilayer zone plates, and facet mirror arrays — serve as illumination shapers, aerial image measurement tools, and projection optics within EUV scanners. Key assignees include Carl Zeiss SMT GmbH (JP/KR), Samsung Electronics (KR/US/CN), ASML Netherlands B.V. (KR), IMEC VZW (KR), Trumpf Laser Systems for Semiconductor Manufacturing GmbH (KR), and Taiwan Semiconductor Manufacturing Company Limited (KR). Refractive optics cannot operate at EUV wavelengths, making diffractive and reflective DOEs the only viable optical architecture — a structural moat that has concentrated IP in the hands of a small number of specialist suppliers.

AR/VR Near-Eye Displays (~25 records)

The second major domain encompasses waveguide combiners with integrated DOE pupil expanders, holographic optical elements, and light-field displays for AR/VR headsets. DOEs enable see-through combiner functionality and wide-field-of-view image delivery in compact form factors. Polarisation-selective DOEs — including Pancharatnam-Berry phase elements — are a significant sub-class enabling ultra-compact display engines. Microsoft’s MEMS raster-scanning display engine (CN, 2024) couples image light into a waveguide via an in-coupling DOE with 2D exit-pupil expansion via multiple DOE gratings, eliminating conventional relay optics entirely.

Ophthalmic and Medical Optics

DOEs embedded in intraocular lenses for cataract surgery and refractive correction use concentric annular zone profiles to split incident light into multiple diffraction orders corresponding to distinct focal distances. Alcon’s 2025 AU patent demonstrates four-order constructive interference producing near, far-intermediate, near-intermediate, and distance foci — with the far-intermediate add power constrained to less than half of the near add power. Physiol SA’s trifocal IOL (CN, 2018) achieves three focal points through superposition of two partial diffractive profiles while limiting light loss to high diffractive orders. Research published by Nature has documented the clinical performance advantages of diffractive multifocal IOLs over monofocal alternatives in presbyopia correction.

Security and Authentication

A niche but notable application applies variable DOEs for document and product authentication via image analysis. The sole record in this category — from the Institute for Systems and Robotics, Coimbra (ISR Coimbra, PT, 2024) — uses HSV colour space analysis and structural similarity indexing to authenticate variable DOE presence on QR codes or logos. Given the widespread commercial deployment of DOE-based security features in currency, packaging, and luxury goods, this domain appears significantly underpatented relative to its real-world use.

Geographic and Assignee Concentration in the DOE Patent Landscape

South Korea accounts for approximately 40% of the 70+ retrieved records — the single largest jurisdiction by volume — reflecting the filing strategies of Samsung Electronics, ASML, Carl Zeiss SMT, Trumpf Laser Systems, and Korean domestic firms including ISOL Inc. Japan and China each account for approximately 20% of records, with the remaining 20% distributed across EP, US, AU, TW, PT, and IL jurisdictions. This geographic distribution reflects both the strategic importance of Korean semiconductor manufacturing and the emergence of Chinese AR/VR optics firms as significant DOE innovators.

Assignee concentration diverges sharply between the two primary domains. In EUV DOEs, Carl Zeiss SMT GmbH leads with approximately 12 records across JP and KR, providing comprehensive coverage of EUV illumination optics architecture. Samsung Electronics holds approximately 8 records across KR, US, JP, and CN, combining EUV lithography process patents with DOE-based metrology tools. ASML Netherlands B.V. contributes approximately 5 records in KR focused on EUV source metrology and calibration. Trumpf Laser Systems holds approximately 4 records in KR covering EUV source laser beam guidance systems. This concentration means that a handful of established semiconductor equipment players effectively define the EUV DOE IP landscape — a pattern consistent with broader semiconductor equipment market structures documented by OECD in its semiconductor supply chain analyses.

The AR/VR DOE landscape is structurally different. Microsoft Technology Licensing holds approximately 3 records in CN focused on MEMS-DOE waveguide display engines. Magic Leap holds approximately 2 records in JP and CN focused on DOE waveguide combiners with eye imaging. Beyond these named players, filings span Huawei Technologies, Meta Platforms Technology, Goertek Optical Technology, Coretronic Corporation, Tampere University Foundation, Mytecvision Private Limited, Fuzhou University, and Suzhou University — more than a dozen distinct assignees across US, CN, JP, KR, EP, and FI jurisdictions. This fragmentation is a characteristic signal of a technology domain still in competitive flux.

Five Emerging Directions Shaping DOE Innovation in 2025–2026

The most recent filings in this dataset — concentrated in the 2023–2026 window — point toward five distinct innovation vectors that will define the next competitive cycle in diffractive optical element technology.

1. Adaptive DOEs for Vergence-Accommodation Conflict Resolution

Tampere University Foundation filed two patents in 2025 — one in JP and one in CN — demonstrating DOE lenses with spatially varying phase delays that enable multi-depth focus in a single flat optic. The Adjustable Near Eye Display patent shows a DOE lens providing position-dependent phase delays across its aperture to create extended depth-of-field perception, directly addressing the vergence-accommodation conflict that limits the physiological comfort of current AR/VR headsets. This represents one of the most technically differentiated IP positions in the AR/VR DOE space.

2. Polarisation-Selective Diffractive Micro-Optics at the Pixel Level

Meta Platforms Technology’s 2023 CN filing demonstrates per-pixel Pancharatnam-Berry phase microlens arrays aligned to individual Micro OLED emitters, enabling precise beam collimation and steering without macroscopic optics. This approach — integrating polarisation-diffractive function at the emitter level — represents a fundamental architectural shift from waveguide-level DOE integration. Given that only a small number of filings cover PBP microlenses in this dataset, this constitutes a narrow but high-value IP window.

3. Metasurface-DOE Hybridisation in Near-Eye Display Engines

Mytecvision Private Limited’s 2024 CN filing shows deformable metasurface lens assemblies replacing conventional DOE stacks in near-eye display optical engines, enabling dynamic focus adjustment through mechanical deformation. This is an early signal of the convergence between classical diffractive optics and metasurface technology — a boundary that the broader photonics research community, including researchers publishing in IEEE journals, has been anticipating for several years.

4. Machine Learning-Guided EUV Illumination Configuration

Samsung Electronics filed three closely related patents in KR in 2025 covering simulation-driven selection of EUV point source combinations to maximise aerial image fitness values, Fourier approximation-based EUV source configuration, and wavefront correction for EUV illumination systems. These filings collectively signal a shift from fixed DOE mirror configurations to adaptive, ML-driven illumination synthesis that treats the facet mirror array as a programmable DOE — a conceptual step change from the deterministic optical design paradigm that has governed EUV illumination since the 2010s.

5. Korean Domestic Challengers in EUV Inspection Optics

ISOL Inc.’s 2024 and 2025 KR filings covering multilayer reflective zone plates for EUV mask inspection and high-performance EUV microscopes with free-form illumination systems represent the emergence of Korean domestic suppliers directly challenging the Carl Zeiss SMT and ASML duopoly in EUV inspection optics. These filings reflect a broader Korean industrial policy priority to develop domestic EUV supply chain capability, consistent with national semiconductor strategy initiatives documented by bodies including WIPO.

Strategic Implications for IP and R&D Teams

The DOE patent landscape in this dataset presents markedly different strategic environments depending on which sub-domain an organisation is operating in — and the implications for IP positioning, white-space identification, and competitive monitoring differ accordingly.

EUV DOE is a near-duopoly with narrow entry points. Carl Zeiss SMT GmbH and Samsung Electronics collectively account for the majority of EUV diffractive illumination optics filings in this dataset. R&D teams seeking EUV DOE white space should focus on zone plate efficiency enhancement beyond the 50% first-order diffraction threshold demonstrated in Samsung’s 2014 US patent, or on adaptive facet-mirror control algorithms — the direction Samsung’s 2025 KR filings are pointing. New entrants including ISOL Inc. and IMEC are filing in KR, suggesting that Korean domestic supply chain development is an active priority.

AR/VR waveguide DOE is competitively fragmented and strategically open. The AR/VR DOE space shows filings from over a dozen distinct assignees across US, CN, JP, KR, EP, and FI jurisdictions. This fragmentation signals an opportunity for IP position-building through differentiated sub-aperture phase profile designs — particularly for resolving the vergence-accommodation conflict, as demonstrated by the Tampere University Foundation patents filed in 2025.

Polarisation-diffractive hybrid elements are an IP-sparse frontier. PBP microlenses and polarisation-selective DOEs appear in only a small number of filings from Meta Platforms Technology and Mytecvision in this dataset. Given their enabling role in ultra-compact display engines, this represents a narrow but high-value IP window for organisations with relevant photonics fabrication capabilities.

Metasurface-DOE convergence is nascent but directionally clear. The appearance of metasurface lens assemblies with mechanical deformability in 2024 CN filings indicates that the boundary between classical DOEs and metasurfaces is collapsing. IP strategists should monitor PCT and CN filings in this category as a leading indicator of next-generation DOE platform transitions.

Security and authentication DOEs are underexplored. With only one record in this dataset — from an academic institute — covering variable DOE-based authentication, this application domain appears significantly underpatented relative to its commercial deployment in currency, packaging, and luxury goods. This represents a potential gap for industrial applicants with existing DOE manufacturing capability.