III
EO/IR & thermal sensors
Every ISR payload and interceptor seeker needs germanium optics and thermal cores.
The choke is two layers deep
Every Western ISR gimbal and interceptor seeker stares through the same bottleneck twice: once at the lens (germanium long-wave IR optics) and once at the detector (the focal-plane array behind it). China refines roughly two-thirds of the world's germanium and banned its export to the US outright in December 2024. The November 2025 trade truce suspended that ban only until November 27, 2026 — and explicitly kept the military end-user prohibition, so defense optics buyers remain effectively embargoed. Spot germanium has gone from ~$1,200/kg in early 2023 to roughly $8,600/kg by late May 2026 on the strategic-metals index — up nearly 50% in 2026 alone, though Western in-warehouse assessments ran closer to $5,800/kg as recently as April. The material escape valves are few: Teck's Trail smelter is North America's only commercial-scale primary germanium refiner, and Umicore's Electro-Optic Materials unit is the key Western optics-grade processor and recycler.
At the detector layer, merchant US supply of defense-grade thermal cores concentrates in two names. Teledyne FLIR's Lepton/Boson/Hadron families are the default core in Western drone payloads; Leonardo DRS runs merchant domestic IR focal-plane-array fabs in Dallas, spanning uncooled VOx bolometers and cooled MCT for the Army's third-gen FLIR. France's Lynred is the other Western volume producer, and RTX, Lockheed, L3Harris and BAE run captive detector lines for their own programs — but for a US drone payload buying cores on the open market, the funnel narrows to TDY and DRS. The moat isn't IP on paper — it's twenty-plus years of wafer-level vacuum-packaging yield learning, ITAR fences, and NDAA/Blue-UAS compliance rules that keep the Chinese volume leaders (InfiRay, Hikmicro) out of US defense programs. Cores get designed into payloads and re-qualification cycles run years, so share doesn't move between contract cycles.
What it takes to break it
Two vectors. Substitution at the lens is live: LightPath's BlackDiamond chalcogenide glass (exclusive Naval Research Laboratory license) has already moved a defense prime off germanium and is shipping in germanium-free cooled G5 cameras, with a potential Lockheed missile-program ramp behind it — contingent on Lockheed's NGSRI bid winning the Army's two-way Stinger-replacement downselect, with production around 2028. Note what that breaks: the material choke, not the device choke — de-risking the input actually entrenches the US core makers. Competing at the detector means a greenfield FPA fab, years up the yield curve, and program qualifications nobody funds on spec. Until someone does, the duopoly prices like infrastructure.
What forces the reprice
Near term, Teledyne's May 2026 LASSO award for Rogue 1 is underappreciated: the core maker just moved downstream into the munition itself, capturing seeker, optics and airframe margin in one SKU. The award is an initial test-and-evaluation buy — up to 130 systems over two years — so the margin story builds over quarters, not in the next print. The structural kicker is that counter-UAS doctrine turns thermal cores into consumables: every expendable interceptor burns a seeker on impact (Rogue 1 itself is marketed as recoverable, but the doctrinal direction is expendable mass). And the binary sits on November 27, 2026 — if the suspension lapses without a deal, germanium snaps back to full embargo, spot rips, and everything with a de-China'd IR supply chain (LPTH, DRS, TDY) reprices in a week. Own the layer the Pentagon cannot requalify away from.
Who owns the choke
Leonardo DRS
Operates the other US domestic IR FPA fabs (Dallas, TX), producing uncooled VOx microbolometers and cooled MCT detectors, and was Herschel-award-recognized for the third-generation FLIR FPAs going into Army combat-vehicle sights.
- Bull
- Leonardo DRS operates the other US domestic IR focal-plane fabs in Dallas, making the uncooled microbolometers and cooled MCT detectors that every ISR payload and seeker needs.
- Bear
- Drone EO/IR is one product line within Leonardo DRS's broad defense-electronics portfolio, diluting direct exposure to the sensor chokepoint thesis.
Elbit Systems
Israel's vertically integrated EO/IR house: builds its own thermal imagers, third-gen FLIR, SWIR/MWIR stabilized payloads and seekers for the UAS fleet that makes up ~85% of Israeli Air Force drones, rather than buying cores on the merchant market.
- Bull
- Elbit is a vertically integrated EO/IR house building its own thermal imagers, FLIR and seekers rather than buying cores, supplying the fleet behind ~85% of Israeli Air Force drones.
- Bear
- Drone EO/IR is one segment of Elbit's broad, geographically concentrated defense business, diluting direct exposure to the Western sensor chokepoint.
L3Harris Technologies
VAMPIRE — combat-proven against drones in Ukraine since 2023 — entered high-volume production in Huntsville in March 2026, and the family now spans land, maritime, air and an EW 'Killcode' jamming variant, sitting atop L3Harris' broader EW and software-defined radio franchise.
- Bull
- L3Harris wins on counter-drone scale: VAMPIRE, combat-proven in Ukraine, entered high-volume Huntsville production atop a broad EW and software-defined radio franchise spanning land, sea and air.
- Bear
- VAMPIRE and EW sit inside L3Harris's enormous defense portfolio, so even strong counter-drone production is diluted across the whole company.
LightPath Technologies
Its NRL-licensed BlackDiamond chalcogenide glass is the leading germanium-free substitute for IR optics: a defense prime has already qualified it to replace germanium lenses, germanium-free G5 cooled cameras entered production in 2025, and it supplies optics for Lockheed Martin's NGSRI bid — one of two competitors for the Army's Stinger replacement, production decision ~2028.
- Bull
- LightPath wins if germanium supply tightens: its NRL-licensed BlackDiamond glass is the leading germanium-free IR substitute, qualified by a prime and feeding Lockheed's NGSRI Stinger-replacement bid.
- Bear
- It is a speculative small-cap whose key NGSRI optics ride a competitive program with a production decision only around 2028, leaving revenue distant and uncertain.
Mercury Systems
Supplies the rugged GPU-based EO/IR image-processing subsystems that turn raw focal-plane-array output into exploitable ISR product aboard UAVs (e.g., WAMI/Gorgon Stare-class processing and tactical EO/IR subsystem orders); it sits one layer downstream of the optics/core chokepoint rather than inside it.
- Bull
- Mercury supplies the rugged GPU-based EO/IR image-processing subsystems that turn raw focal-plane output into exploitable ISR aboard UAVs, with WAMI/Gorgon Stare-class and tactical subsystem orders.
- Bear
- It sits one layer downstream of the optics/core chokepoint rather than inside it, and the processing work is a fraction of Mercury's broad defense-electronics base.
Teledyne Technologies (Teledyne FLIR)
Teledyne FLIR's Lepton/Boson/Hadron uncooled cores are the default thermal sensor inside Western drone ISR payloads, and the May 2026 Army LASSO award for Rogue 1 puts its seekers inside the interceptor/munition itself.
- Bull
- Teledyne FLIR's Lepton/Boson/Hadron cores are the default thermal sensor in Western drone ISR payloads, and the May 2026 Army LASSO award for Rogue 1 puts its seekers inside the munition itself.
- Bear
- Drone EO/IR cores are one franchise within Teledyne's sprawling instrumentation and imaging conglomerate, diluting direct exposure to the sensor chokepoint.
Umicore SA (ADR)
Umicore Electro-Optic Materials is the West's key integrated germanium refiner and recycler, supplying germanium blanks, substrates, IR coatings and GASIR chalcogenide optics — the principal non-China escape valve for the material layer of this chokepoint.
- Bull
- Umicore is the West's key integrated germanium refiner and recycler, supplying blanks, substrates, IR coatings and GASIR optics, the principal non-China escape valve for the material layer.
- Bear
- Germanium optics are a small unit inside Umicore's broad materials group, and this thin OTC ADR offers only diluted, second-order exposure to the choke.
Catalyst calendar
- 2026-11-27Expiry of China's suspension of the gallium/germanium/antimony export ban to the UShighIf the suspension lapses without renewal, germanium snaps back to full embargo (the military end-user ban never lifted), re-tightening IR optics supply overnight and repricing every de-China'd name in the chain.
- 2026-07-22Teledyne Q2 2026 earnings (first print after LASSO award)mediumFirst quarter to quantify the Rogue 1/LASSO loitering-munition win and Digital Imaging commentary on defense thermal-core demand — evidence the core maker is capturing downstream seeker margin.
- 2026-09-10LightPath fiscal Q4/FY2026 resultsmediumFull-year print shows whether germanium-free BlackDiamond design wins (Lockheed missile program, G5 cooled cameras, ~$40M camera supply deal) are converting into an actual revenue ramp.
- 2026-10-12AUSA Annual Meeting 2026 (Washington, DC, Oct 12-14)lowThe Army's premier land-power expo is where EO/IR payload roadmaps, next-gen FLIR upgrades and counter-UAS interceptor awards get unveiled — a concentrated news window for every name in this chokepoint.