NASA Ames / Technion — FLUTE (Fluidic Telescope Experiment)¶
Last updated: Session 79, 2026-04-07
Summary¶
FLUTE is one of the most impressive multi-program arcs in the FO portfolio: 6 projects across 4 programs (FO, GSFC CIF ×2, NIAC Phase I, NIAC Phase II), spanning from parabolic flight validation to a revolutionary 50-meter liquid mirror space telescope concept. The FO parabolic flights provided the critical microgravity empirical data — lenses and mirrors formed by surface tension — that justified both ISS experimentation (Axiom-1) and NIAC selection.
FO Projects¶
| ID | Title | Period | TRL | Notes |
|---|---|---|---|---|
| 106725 | Fluidic Telescope Experiment (FLUTE) | 2021-08 → 2024-08 | 4→6 | Parabolic flights: Dec 2021 (lenses), Nov 2022 (mirrors) |
Full Program Chain (6 projects)¶
FO [106725] (2021-2024, TRL 4→6)
├── Parabolic flights: Dec 2021 (lenses from synthetic oils)
├── ISS Axiom-1 experiment: Apr 2022 (Eytan Stibbe)
└── Parabolic flights: Nov 2022 (mirrors from ionic liquids + gallium alloy)
↓
GSFC CIF [146424] (2021-2022, TRL 1→3)
"Novel Application of Fluidic Structures for Structures & Thermal Management"
PI: Dwivedi (GSFC), co-I: Balaban
└── Explored fluidic radiator applications
↓
GSFC CIF [146537] (2022-2023, TRL 2→3)
"Ionic Fluid Optics for the Next Great Science Flagship"
PI: Dwivedi, co-I: Balaban
└── Demonstrated ionic liquid mirror with reflective coating
↓
NIAC Phase I [158445] (2023-05 → 2024-01, TRL 2→3)
"Fluidic Telescope: Enabling the Next Generation of Large Space Observatories"
PI: Balaban; 11 co-Is including Bercovici, Colaprete, Belikov, Dwivedi, Boston
└── 50m mirror concept study; ionic liquid selection; mission concept
↓
NIAC Phase II [158446] (2024-05 → 2026-05, ACTIVE)
"Fluidic Telescope (FLUTE): Enabling the Next Generation of Large Space Observatories"
PI: Balaban; $600K funding
└── Mirror frame architecture, ML-based reflectivity enhancement, LEO demo concept
Key People¶
- Edward Balaban — PI (NASA Ames). 13+ TechPort projects across FO, NIAC, GSFC CIF
- Moran Bercovici — Co-I (Technion, Israel). Runs the Fluidic Technologies Laboratory
- Vivek H. Dwivedi — PI on GSFC CIF projects (Goddard). Bridge between structural and optical applications
- Anthony Colaprete — Co-I (Ames). Known for LCROSS lunar impact mission
- Ruslan Belikov — Co-I (Ames). Exoplanet coronagraph expert
- Eytan Stibbe — Axiom-1 astronaut who conducted ISS experiment (Apr 2022)
Technology¶
Concept: Use liquid surface tension in microgravity to form optical components (lenses and mirrors) with sub-nanometer surface quality. Liquids naturally form perfect optical surfaces without grinding or polishing. The approach is theoretically scale-invariant — the same physics works at 3 cm and 50 meters.
FO contributions: - Dec 2021: First parabolic flights tested free-standing liquid lenses from synthetic oils of different viscosities - Nov 2022: Second parabolic flights shifted to liquid mirrors using ionic liquids and gallium alloy (reflective metal with extremely low melting point) - Both campaigns provided essential microgravity validation data
ISS Axiom-1 (Apr 2022): Stibbe injected polymers into rings (3–15 cm), forming lenses under microgravity, then UV-cured them to solid. Solidified lenses returned to Earth for optical analysis. This was the first demonstration of forming AND solidifying optical components in actual (not parabolic) microgravity.
Current state (NIAC Phase II): Designing a 50-meter unsegmented liquid primary mirror space telescope. Focus areas: mirror frame architecture, ionic liquid reflectivity enhancement (ML-based), thermal Marangoni effects, subscale LEO demonstrator concept. Target timeline: feasible within 15-20 years.
Downstream Impact¶
| Category | Details | Confidence |
|---|---|---|
| NIAC Phase I | [158445] selected May 2023, completed Jan 2024 | Confirmed |
| NIAC Phase II | [158446] selected May 2024, active through May 2026, $600K | Confirmed |
| ISS experiment | Axiom-1 Apr 2022 (Stibbe); first solidified optic from space | Confirmed |
| GSFC CIF projects | [146424] + [146537] parallel development at Goddard | Confirmed |
| LEO demonstration | Subscale spacecraft demo being designed in NIAC Phase II | Planned |
| Commercial | None yet — revolutionary concept stage | N/A |
Publications¶
- "In-space manufacturing of optical lenses: Fluidic Shaping aboard the International Space Station" — arXiv 2510.06474 (Oct 2025). ISS Axiom-1 results: polymer deformation problem + 172mm water lens success
- "Fluidic Shaping over arbitrary domains: theory and high order finite-elements solver" — arXiv 2602.14856 (Feb 2026). Theory extension to non-circular geometries
- "Structural Requirements and Scaling Analysis of a Fluidic Mirror Space Telescope Support Structure" — IEEE Aerospace Conference (Mar 2024), NTRS 20240000664. Finding: tetrahedral truss design, ~15,000 kg for 50m
- "Fluidic shaping and in-situ measurement of liquid lenses in microgravity" (Sep 2023) — referenced in FO project description
- SpaceNews article: "The NASA Fluidic Telescope (FLUTE) Project"
- NIAC Symposium poster and presentation (2023)
- Multiple media coverage: NASA, Space.com, VOA, Israel Space Agency
Financial Tracking¶
No USASpending search needed — these are intramural NASA center projects (Ames, GSFC) and NIAC grants. NIAC Phase II is $600K. Total federal investment across all 6 projects is likely $1-2M.
Archetype¶
"Revolutionary Concept Incubator" — FO provided the low-cost parabolic flight testing that generated empirical microgravity data for a revolutionary concept. Without the FO flights proving that liquid optics actually work in microgravity (not just in simulation), the NIAC proposals would have lacked experimental grounding. The ISS Axiom-1 experiment bridged the gap between brief parabolic microgravity and sustained orbital conditions.
This is distinct from the typical FO archetype because the technology isn't maturing toward near-term deployment — it's feeding a 15-20 year revolutionary concept pipeline. The FO contribution was validation, not maturation.
Timeline¶
| Date | Event |
|---|---|
| 2021-08 | FO project [106725] starts |
| 2021-10 | GSFC CIF [146424] starts (parallel fluidic structures work) |
| 2021-12 | First parabolic flights: liquid lenses from synthetic oils |
| 2022-04 | ISS Axiom-1: Stibbe creates solidified polymer lenses in orbit |
| 2022-10 | GSFC CIF [146537] starts: ionic fluid optics |
| 2022-11 | Second parabolic flights: liquid mirrors (ionic liquids + gallium) |
| 2023-01 | NIAC Phase I [158445] selected |
| 2023-05 | NIAC Phase I starts |
| 2023-09 | "Fluidic shaping" publication |
| 2024-01 | NIAC Phase I completed |
| 2024-05 | NIAC Phase II [158446] starts ($600K) |
| 2024-08 | FO project [106725] completed |
| ~2025-08 | Additional parabolic flights (NIAC Phase II campaign) |
| 2025-09 | NIAC Symposium 2025: Balaban presents FLUTE Phase II results (mirror frame architectures, ML-based reflectivity, subscale LEO demo) |
| 2026-05 | NIAC Phase II expected completion |
Session 51 update — NIAC Phase II progress: - Balaban presented FLUTE at the NIAC Symposium 2025 (September 9, 2025, NASA HQ). Phase II work advancing on two parallel tracks: (1) technology refinement through additional parabolic flights, and (2) mission architecture for the future 50m telescope. - Additional parabolic flights were conducted in ~August 2025 as part of NIAC Phase II — continuing to refine mirror formation with ionic liquids and reflectivity enhancement. - The Technion partnership remains active — Israel Space Agency highlighted FLUTE as a flagship US-Israel collaboration. Bercovici's Fluidic Technologies Laboratory maintains an active FLUTE project page. - NIAC Phase II ($600K) remains on track for May 2026 completion. Key deliverables: mirror frame architecture analysis, ML-based ionic liquid reflectivity models, and subscale LEO demonstrator concept design. - No NIAC Phase III submission detected yet — Phase III would be unprecedented for FLUTE's concept maturity level, but the sustained cross-program support (FO → GSFC CIF ×2 → NIAC I → NIAC II → additional parabolic flights) suggests strong institutional backing.
Session 79 update — ISS results paper reveals polymer challenge + new theory paper: - ISS Axiom-1 results paper published (arXiv 2510.06474, October 7, 2025): Luria, Elgarski, Stibbe, Lopez-Alegria, Canerday, Razin, Perl, Frumkin, Ericson, Gommed, Widerker, Gabay, Belikov, Balaban, and Bercovici. "In-space manufacturing of optical lenses: Fluidic Shaping aboard the International Space Station." Key findings: (a) Polymer lenses achieved sub-nanometric surface smoothness but showed unexpected thermo-chemical polymerization deformations — a new open problem unique to microgravity that was not observed in parabolic flights or ground testing. (b) Water lens (172 mm diameter) confirmed scalability of fluidic shaping and demonstrated basic optical functionality. The polymer deformation problem is a significant technical hurdle — the team must resolve polymerization dynamics before in-space lens fabrication is practical. - New theory/solver paper (arXiv 2602.14856, February 16, 2026): Hari and Bercovici. "Fluidic Shaping over arbitrary domains: theory and high order finite-elements solver." Extends fluidic shaping theory from circular/elliptical domains to arbitrary geometries using quintic finite elements — directly relevant to non-circular mirror architectures for the 50m telescope concept. - NIAC Phase II still active, last TechPort update December 18, 2025. On track for May 2026 completion. No Phase III selection in the 2025 NIAC cycle (announced January 10, 2025). A Phase III submission, if planned, would come in the 2026 cycle. - LEO demo mission remains in concept maturation (a NIAC Phase II deliverable). No mission selection, partnership, or flight opportunity contract announced. - Assessment: The ISS paper is the most substantive development — it simultaneously validates the fluidic shaping approach (172 mm water lens works) and identifies a material/process challenge (polymer deformations) that the team will need to solve. This is exactly the kind of finding that justifies the FO→ISS escalation: parabolic flights couldn't detect this problem because they're too brief for polymerization to complete.
Cross-References¶
- Part of the broader NASA in-space manufacturing theme (connects to Made in Space, CisLunar Industries, FOMS/ZBLAN)
- Technion/Israel collaboration — international partnership archetype
- Colaprete co-I connection to lunar science (LCROSS heritage)